How to remove mainsheet track that is 5200'd on
#1
Posted 19 November 2011 - 04:36 AM
It has 4 1/2 inch bolts each side of the cockpit holding it to the deck.
The builder seemed to use about a gallon of 5200.
I removed the nuts but the bolts are caked with 5200, as is the full contact area of the track to the deck. The bolt heads are not accessible as they are inside the track so I cannot wind them out.
The track is in a bit of a recess in the deck so its hard to get a tool in there to cut into the 5200.
I have tried applying considerable pressure (with the mainsheet) and cannot get it to budge an inch.
Anyone have any tips?!
Thanks!
#3
Posted 19 November 2011 - 05:13 AM
Thanks - saw that on another thread too. I was a bit worried about what it might to do the paintwork, its not a gelcoat boat.
Will probably get some and give it a careful try though.
#4
Posted 19 November 2011 - 06:28 AM
I could get the bolts out, but I could not move the wood. I tried prying and chemicals. In the end, cheesewire was the best. I bought some steel guitar strings, tied one end to a stanchion base and the other to a line around a winch. Then, one click at a time over 30 mins or so, I was able to cheeewire through the 5200 bead with no damage to the wood or the deck.
#5
Posted 19 November 2011 - 06:37 AM
I had the same problem with wooden toe rails stuck on with bolts and 5200.
I could get the bolts out, but I could not move the wood. I tried prying and chemicals. In the end, cheesewire was the best. I bought some steel guitar strings, tied one end to a stanchion base and the other to a line around a winch. Then, one click at a time over 30 mins or so, I was able to cheeewire through the 5200 bead with no damage to the wood or the deck.
Damn, nice trick!
#6
Posted 19 November 2011 - 07:10 AM
"
#7
Posted 19 November 2011 - 02:04 PM
#8
Posted 19 November 2011 - 02:53 PM
The issue I have with the guitar wire is that i cannot take the bolts out, they are captive in the track so I cant wire past those.
I am also concerned about using a head gun with the paint work. Maybe I just need to make sure the track gets hot and not the deck (again, its recessed deeply so not much room).
cheers
Nige
#9
Posted 19 November 2011 - 06:20 PM
Here's a link to actually purchasing Anti-Bond:
Fisheries Supply
This stuff is amazing. I've used it on paint before, I don't think it would ruin it. It's not too pricey, you could buy a can and test out a small area first. Be sure to let it sit for a little while.
#10
Posted 19 November 2011 - 08:05 PM
Can you apply slow, steady pressure up on the bottom of the bolts? Maybe you can start on one end using a combination of the main sheet lifting and pushing the bolts to get a start. Then wedges to work down the length slowly but steadily applying force to separate the track from the boat.
#11
Posted 19 November 2011 - 09:36 PM
What issue are you trying to solve? Is it absolutely necessary to remove the track?
Can you apply slow, steady pressure up on the bottom of the bolts? Maybe you can start on one end using a combination of the main sheet lifting and pushing the bolts to get a start. Then wedges to work down the length slowly but steadily applying force to separate the track from the boat.
Thanks - yes, I am trying to replace the track completely. I may be able to get a car jack under the 4 bolts and get some consistent pressure to help - thanks.
#12
Posted 19 November 2011 - 11:46 PM
You mentioned the track is in a bit of a recess. What are the ends like? Can you insert any type of bar or rod?
If you can get a bar extended out and lift the end, that will give you some more leverage. Again, recommending slow steady pressure. Another alternative is rigging a support like a saw horse over the end and using a turn buckle to twist on some pressure over time. A turn buckle with an "L" shaped bolt inserted into the end or in Eye bolt with the rod/bar inserted into the track and through the eye.
#13
Posted 19 November 2011 - 11:50 PM
Is the track worn or damaged? Changing sizes?
You mentioned the track is in a bit of a recess. What are the ends like? Can you insert any type of bar or rod?
If you can get a bar extended out and lift the end, that will give you some more leverage. Again, recommending slow steady pressure. Another alternative is rigging a support like a saw horse over the end and using a turn buckle to twist on some pressure over time. A turn buckle with an "L" shaped bolt inserted into the end or in Eye bolt with the rod/bar inserted into the track and through the eye.
Replacing a lewmar one with a harken windward sheeting track.
Thanks for the advice on the slow steady pressure - that seems like a good idea whatever way ends up working on the 5200 itself.
I can get a bar int the end of the track, the recess is fore/aft of the track, the ends are open.
Thanks all - think this is a lot to go on.
#14
Posted 20 November 2011 - 05:03 AM
#15
Posted 20 November 2011 - 06:26 PM
Can you get a battery opperated impact driver on the bolts?
You might be able to make up an angled blade for one of those vibrating multi-cutters, and get it under the track.
Mind that nice blue paint though.
Paul
#16
Posted 21 November 2011 - 02:48 AM
#17
Posted 21 November 2011 - 04:48 AM
#18
Posted 21 November 2011 - 05:44 AM
i usually use a blow torch and a knife. oh, and a glove. but, thats to get the scuppers out of a 29er, from the way iread that you dont quite have the same amount of access.
So how is your post even moderately relevant?
#19
Posted 21 November 2011 - 06:00 AM
i usually use a blow torch and a knife. oh, and a glove. but, thats to get the scuppers out of a 29er, from the way iread that you dont quite have the same amount of access.
So how is your post even moderately relevant?
how is yours relevant? or do you just like to search out my posts and derail threads.
#20
Posted 21 November 2011 - 06:50 AM
I think removing the bolts is a key issue before putting too much effort into lifting the track. If you were able to remove the nuts, clearly you have access to the bottom of the bolts (end of the thread). How much thread is exposed? Is there enough to put a nut on, followed by a second nut and tighten the 2 nuts against each other? If you can do this, you can place a spanner or socket on the bottom nut and try to torque the bolt inside the hole to break the 5200. I'd try soaking with the solvent as well to soften it as much as possible. But if you can't budge the bolts within the hole this way, you won't get far trying to move them vertically by applying upward pressure.
Assuming you are successful at removing the bolts, I'd try using a strong paint scraper with a bevelled edge as a chisel. Width to suit the rebate within which the track sits. You may have to look around, but here in AUS I have a couple of these multi purpose scrapers. The blade is a bit over 1mm thick, made from stainless steel and has a sharp bevel. The blade edge is also off square by 5 - 10 degrees which also helps. These have a strong wooden handle and tapping away with a hammer forces the scraper under the track like a wedge. But the depth of operation is limited - if you are trying to lift 10' of track, the wire is the only thing I can see that will work.
Good luck and please report back.
Oh, and don't use 5200 on the new track!
#21
Posted 21 November 2011 - 10:12 AM
it's not the track that is 'windward sheeting'Replacing a lewmar one with a harken windward sheeting track.
if the current car is of the right shape, tap into it and add the Harken windward sheeting Retrofit 'Adapter Kit' to it
if the car is not of the right dimensions, get someone to make it fit
#22
Posted 21 November 2011 - 12:54 PM
it's not the track that is 'windward sheeting'
Replacing a lewmar one with a harken windward sheeting track.
if the current car is of the right shape, tap into it and add the Harken windward sheeting Retrofit 'Adapter Kit' to it
if the car is not of the right dimensions, get someone to make it fit
Yeah I get that - I just dont like it, I am not a fan of the bearings or any part of the system. The retrofit also does not fit this car. Admittedly, had I known how much of a headache removing the track would be, I would not have purchased the upgrade so lightly.
But I now have the system I want sitting in my garage and i would much prefer it on the boat.
Recidivist - thanks but the hex nuts are captive in the bottom part of the track, the track holds them in place so they cannot turn, so there is no way to loosen by twisting from the bottom of the bolt.
cheers
Nige
#23
Posted 21 November 2011 - 06:33 PM
#24
Posted 21 November 2011 - 06:39 PM
I know this solution is a bit of a weight issue. Have you thought about tapping the old track and bolt the new track on top of it?
Yeah, someone else mentioned that too but the track is 7ft long, weighs a ton and this is a new boat so I want it to look right too.
Will dig into the fun over thanks giving probably!
Thanks all.
I'll report back on what worked (or didnt)!
#25
Posted 21 November 2011 - 07:03 PM
#26
Posted 21 November 2011 - 07:30 PM
i usually use a blow torch and a knife. oh, and a glove. but, thats to get the scuppers out of a 29er, from the way iread that you dont quite have the same amount of access.
So how is your post even moderately relevant?
how is yours relevant? or do you just like to search out my posts and derail threads.
Each of you boys go sit in your corner. Go study or something.
Back to the thread. Love the cheesewire idea. Thanks.
#27
Posted 21 November 2011 - 07:52 PM
#28
Posted 21 November 2011 - 09:45 PM
Is it the whole track that is bolted down, or just the bolts?
The whole track.
#29
Posted 21 November 2011 - 10:48 PM
#30
Posted 21 November 2011 - 10:52 PM
Can you grind just above the bolts to remove them, then start pulling with the main from one end? And if you can get the bolts out, the wire option comes into play.
Yeah, i think thats the last resort scenario. Its the high beam, high load track so thats a lot of shit to grind away, plus its only a year old and despite the fact I want to replace, it, also want to keep it in a functioning state for whatever reason (mental hoarding issue probably).
I am pretty sure the grinder will come out after I have spent a weekend swearing at it.
Pretty sure the first plan is going to be pressure on the bolts from underneath and pulling from above with a heat gun/guitar wire and see if there is any promise.
#31
Posted 21 November 2011 - 11:23 PM
Kind of pricey, but quality stuff, probably on a par with Harken.
#32
Posted 21 November 2011 - 11:26 PM
Can you grind just above the bolts to remove them, then start pulling with the main from one end? And if you can get the bolts out, the wire option comes into play.
Yeah, i think thats the last resort scenario. Its the high beam, high load track so thats a lot of shit to grind away, plus its only a year old and despite the fact I want to replace, it, also want to keep it in a functioning state for whatever reason (mental hoarding issue probably).
I am pretty sure the grinder will come out after I have spent a weekend swearing at it.
Pretty sure the first plan is going to be pressure on the bolts from underneath and pulling from above with a heat gun/guitar wire and see if there is any promise.
Grumpy has previously advocated using petrol (gas to you?) to soften 5200, but that mightn't be good for your paint. But you'll have to apply masking tape to protect the paint if you bring out the grinder as well.
Is the track straight or curved?
#33
Posted 21 November 2011 - 11:30 PM
The warm 5200 vs the piano or cheese wire idea to pry the track off the deck sounds like a good idea to try.
#34
Posted 21 November 2011 - 11:46 PM
Can you grind just above the bolts to remove them, then start pulling with the main from one end? And if you can get the bolts out, the wire option comes into play.
Yeah, i think thats the last resort scenario. Its the high beam, high load track so thats a lot of shit to grind away, plus its only a year old and despite the fact I want to replace, it, also want to keep it in a functioning state for whatever reason (mental hoarding issue probably).
I am pretty sure the grinder will come out after I have spent a weekend swearing at it.
Pretty sure the first plan is going to be pressure on the bolts from underneath and pulling from above with a heat gun/guitar wire and see if there is any promise.
Grumpy has previously advocated using petrol (gas to you?) to soften 5200, but that mightn't be good for your paint. But you'll have to apply masking tape to protect the paint if you bring out the grinder as well.
Is the track straight or curved?
Its straight. Thanks for all the ideas, for anyone else suggesting i bolt on another track - appreciate the suggestions but its not going to happen. Its a new boat and its going to look right, i have also already bought the harken track so not after other hardware suggestions.
(also, to be clear - i have no access to the head side of the bolts, they are captive inside the track).
I have a plan from the above suggestions - thanks!
Nige
#35
Posted 22 November 2011 - 01:08 AM
I had the same problem with wooden toe rails stuck on with bolts and 5200.
I could get the bolts out, but I could not move the wood. I tried prying and chemicals. In the end, cheesewire was the best. I bought some steel guitar strings, tied one end to a stanchion base and the other to a line around a winch. Then, one click at a time over 30 mins or so, I was able to cheeewire through the 5200 bead with no damage to the wood or the deck.
time consuming, but it works. We used that technique at the boat yard I used to work at when trying to take 5200'd toerails off
#36
Posted 22 November 2011 - 06:27 AM
now that you have the nuts off, pull the track sideways with a chain block to slide it off the heads of the bolts?, with a lot of heat gun usage you might have a half a chance.
I'm thinking chain block hooked in the the outboard edge of the track and pulling inboard to a pad eye or anything else really strong
#37
Posted 22 November 2011 - 04:56 PM
I know this solution is a bit of a weight issue. Have you thought about tapping the old track and bolt the new track on top of it?
Yeah, someone else mentioned that too but the track is 7ft long, weighs a ton and this is a new boat so I want it to look right too.
Will dig into the fun over thanks giving probably!
Thanks all.
I'll report back on what worked (or didnt)!
Drill out the old bolts? Since you don't care about the track, and since you seem to have access to the bolts from below, drill off the old head and then using a rod the size of the bolt - hammer the bolt through to the underside.
then use the guitar string approach to cut through the 5200... Note - remember not to run the wire onto the winch itself
#38
Posted 22 November 2011 - 05:01 PM
I know this solution is a bit of a weight issue. Have you thought about tapping the old track and bolt the new track on top of it?
Yeah, someone else mentioned that too but the track is 7ft long, weighs a ton and this is a new boat so I want it to look right too.
Will dig into the fun over thanks giving probably!
Thanks all.
I'll report back on what worked (or didnt)!
Drill out the old bolts? Since you don't care about the track, and since you seem to have access to the bolts from below, drill off the old head and then using a rod the size of the bolt - hammer the bolt through to the underside.
then use the guitar string approach to cut through the 5200... Note - remember not to run the wire onto the winch itself
The heads are captive inside the track - I dont have access to them without grinding out the track and if i did that I could just unwind the bolts.
I do have access to the thread end of the bolt but cutting them off and drilling up is sounds like an even more daunting task.
Stevo - like the idea of pulling the track sideways off the heads but with the amount of 5200 holding the track down, that would take a huge amount of force....
#39
Posted 22 November 2011 - 11:10 PM
If you know where the bolt heads are inside the track, why not drill down trhough the track to the heads, drill off the heads, and then PULL the bolts out from below?
I know this solution is a bit of a weight issue. Have you thought about tapping the old track and bolt the new track on top of it?
Yeah, someone else mentioned that too but the track is 7ft long, weighs a ton and this is a new boat so I want it to look right too.
Will dig into the fun over thanks giving probably!
Thanks all.
I'll report back on what worked (or didnt)!
Drill out the old bolts? Since you don't care about the track, and since you seem to have access to the bolts from below, drill off the old head and then using a rod the size of the bolt - hammer the bolt through to the underside.
then use the guitar string approach to cut through the 5200... Note - remember not to run the wire onto the winch itself
The heads are captive inside the track - I dont have access to them without grinding out the track and if i did that I could just unwind the bolts.
I do have access to the thread end of the bolt but cutting them off and drilling up is sounds like an even more daunting task.
Stevo - like the idea of pulling the track sideways off the heads but with the amount of 5200 holding the track down, that would take a huge amount of force....
#40
Posted 22 November 2011 - 11:18 PM
If you know where the bolt heads are inside the track, why not drill down trhough the track to the heads, drill off the heads, and then PULL the bolts out from below?
I know this solution is a bit of a weight issue. Have you thought about tapping the old track and bolt the new track on top of it?
Yeah, someone else mentioned that too but the track is 7ft long, weighs a ton and this is a new boat so I want it to look right too.
Will dig into the fun over thanks giving probably!
Thanks all.
I'll report back on what worked (or didnt)!
Drill out the old bolts? Since you don't care about the track, and since you seem to have access to the bolts from below, drill off the old head and then using a rod the size of the bolt - hammer the bolt through to the underside.
then use the guitar string approach to cut through the 5200... Note - remember not to run the wire onto the winch itself
The heads are captive inside the track - I dont have access to them without grinding out the track and if i did that I could just unwind the bolts.
I do have access to the thread end of the bolt but cutting them off and drilling up is sounds like an even more daunting task.
Stevo - like the idea of pulling the track sideways off the heads but with the amount of 5200 holding the track down, that would take a huge amount of force....
I would like to not destroy the current track unless I really need to - obviously it may come to that pretty quickly, I am not known for my patience...
The thought of drilling the heads off of 8 1/2 inch stainless hex bolts is daunting enough before then trying to pull them out from limited space below.
I think if i was going to attack the track itself, I would just grind a hole in it then wind the bolts out.
#41
Posted 22 November 2011 - 11:22 PM
Hmm? Now that idea isn't so bad. I think that might be filed away for future swearing contests when dealing with removing a track. LOLIf you know where the bolt heads are inside the track, why not drill down trhough the track to the heads, drill off the heads, and then PULL the bolts out from below?
I know this solution is a bit of a weight issue. Have you thought about tapping the old track and bolt the new track on top of it?
Yeah, someone else mentioned that too but the track is 7ft long, weighs a ton and this is a new boat so I want it to look right too.
Will dig into the fun over thanks giving probably!
Thanks all.
I'll report back on what worked (or didnt)!
Drill out the old bolts? Since you don't care about the track, and since you seem to have access to the bolts from below, drill off the old head and then using a rod the size of the bolt - hammer the bolt through to the underside.
then use the guitar string approach to cut through the 5200... Note - remember not to run the wire onto the winch itself
The heads are captive inside the track - I dont have access to them without grinding out the track and if i did that I could just unwind the bolts.
I do have access to the thread end of the bolt but cutting them off and drilling up is sounds like an even more daunting task.
Stevo - like the idea of pulling the track sideways off the heads but with the amount of 5200 holding the track down, that would take a huge amount of force....
Let us know how it goes
#42
Posted 22 November 2011 - 11:27 PM
Just askin.
#43
Posted 22 November 2011 - 11:34 PM
Sounds like a PITA on a brand new boat. Can't you just live with it or retrofit the existing car with something......
Just askin.
Thats the route a sensible person would take for sure.
But in short - no! I dont like the setup, I could adjust the cleats and lines to make it useable but this is a cool and great looking boat and I want to keep the upgrades going as some of the parts it was built with are not quite right for racing.
I am very aware that the pain/benefit ratio of this task is terrible, but I am going to do it anyway.
#44
Posted 22 November 2011 - 11:47 PM
#45
Posted 22 November 2011 - 11:50 PM
you forgot this is a family cruising boat, didn't you!
Funny - that's what my wife said when I (stupidly) showed her this pic from Round the County last week:
Attached Files
#46
Posted 23 November 2011 - 12:14 AM
#47
Posted 23 November 2011 - 12:48 AM
Can you grind just above the bolts to remove them, then start pulling with the main from one end? And if you can get the bolts out, the wire option comes into play.
Yeah, i think thats the last resort scenario. Its the high beam, high load track so thats a lot of shit to grind away, plus its only a year old and despite the fact I want to replace, it, also want to keep it in a functioning state for whatever reason (mental hoarding issue probably).
I am pretty sure the grinder will come out after I have spent a weekend swearing at it.
Pretty sure the first plan is going to be pressure on the bolts from underneath and pulling from above with a heat gun/guitar wire and see if there is any promise.
Grumpy has previously advocated using petrol (gas to you?) to soften 5200, but that mightn't be good for your paint. But you'll have to apply masking tape to protect the paint if you bring out the grinder as well.
Is the track straight or curved?
Cool for exposed clean up. Don't reckon it would work in this situation by the sound of it.
#48
Posted 23 November 2011 - 04:46 AM
#49
Posted 23 November 2011 - 06:15 AM
I did exactly this except for the line gashing to get my old Schaefer track off the aluminum I-beam supporting it. 30 minutes, done. Have spare bits on hand, you will break some.
#50
Posted 27 November 2011 - 05:39 AM
Cheers.
#51
Posted 27 November 2011 - 04:43 PM
#52
Posted 28 November 2011 - 02:36 AM
clever ideaFrom below start the nuts till they are just less than flush, then using cribbing on the interior start at one end and bridge 2-3 nuts with a piece of 1/2 inch bar stock and place a bottle jack between the cribbing and the bar and apply a good amount of pressure. make sure you spread the load on the interior with blocks and boards to spread the load out over as much area as is reasonable. The point load on the nuts and bolts will cause the track end to want to lift. now go up and apply heat to the end of the track and it will separate on its own. shoot a lubricant like wd40 in the gap to prevent re-adhesion and move to the next 2-3 nut/bolt combos repeating as required. you should be able to remove a 6 foot track factory bedded in about an hour using this method. Do not pry from above as this can mar or bend the track.
Cheers.
#53
Posted 28 November 2011 - 05:36 PM
another way is a multifunction tool to cut it loose.
any hd or Lowe's has them. Or go cheap
http://www.harborfre...tool-67707.html
comes with an offset blade for wood.
it will cut right through the 5200
I would heavily mask both sides next to track to reduce chances of scratching boat
for trimming inside a boat,this tool is the bomb!
#54
Posted 30 November 2011 - 05:16 PM
Any update on the project?
Heat is an interesting idea. Wonder if there is a way to apply heat to the aluminum and let it conduct that to the 5200 without tempering the alum.
#55
Posted 30 November 2011 - 05:23 PM
Nige,
Any update on the project?
Heat is an interesting idea. Wonder if there is a way to apply heat to the aluminum and let it conduct that to the 5200 without tempering the alum.
the only update is a little procrastination so far. The weather was pretty shite over the weekend so I put it off and worked on some indoor stuff.
I am trying to think through the heat idea, I really like the idea of applying a good amount of pressure from beneath and above then heat it but as this pic shows, the area is so restricted, I would have to only heat the track and hope it conducted but I am not convinced I could get enough area hot enough that way. I think it would be very hard to not damage the paint work if I tried to heat the edge of the 5200 directly.
The grinder is still the backup plan but I am mulling over all the other options first.
Attached Files
#56
Posted 30 November 2011 - 06:05 PM
Go the drill route before the grinder. After all, with the drill approach the track can still be recycled for use
Nige,
Any update on the project?
Heat is an interesting idea. Wonder if there is a way to apply heat to the aluminum and let it conduct that to the 5200 without tempering the alum.
the only update is a little procrastination so far. The weather was pretty shite over the weekend so I put it off and worked on some indoor stuff.
I am trying to think through the heat idea, I really like the idea of applying a good amount of pressure from beneath and above then heat it but as this pic shows, the area is so restricted, I would have to only heat the track and hope it conducted but I am not convinced I could get enough area hot enough that way. I think it would be very hard to not damage the paint work if I tried to heat the edge of the 5200 directly.
The grinder is still the backup plan but I am mulling over all the other options first.
#57
Posted 01 December 2011 - 04:07 AM
Cheers
#58
Posted 01 December 2011 - 04:56 AM
How many bolts do you have to remove? I'm wondering if you can heat up a wire and lace it through between the bolts. Or maybe do something with a heated putty knife bent into a hook shape of some kind.
#59
Posted 01 December 2011 - 12:13 PM
Nige,
Any update on the project?
Heat is an interesting idea. Wonder if there is a way to apply heat to the aluminum and let it conduct that to the 5200 without tempering the alum.
the only update is a little procrastination so far. The weather was pretty shite over the weekend so I put it off and worked on some indoor stuff.
I am trying to think through the heat idea, I really like the idea of applying a good amount of pressure from beneath and above then heat it but as this pic shows, the area is so restricted, I would have to only heat the track and hope it conducted but I am not convinced I could get enough area hot enough that way. I think it would be very hard to not damage the paint work if I tried to heat the edge of the 5200 directly.
The grinder is still the backup plan but I am mulling over all the other options first.
I know someone else mentioned it, but I would double check the width of the Harken car; the Midrange car is 2.75" wide (70mm) but you will need at least 3.125" opening, which looks tight as shown in your picture. Perhaps you could use a tandem set of Smallboat cars with a coupler, but based upon your 4-1 traveler controls, Midrange looks like the right size selection.
As for removing the track, if you are committed to changing it, I would cut out the center clear span of the track and use a heater of some sort to blow warm air down the middle of the track tube. While that is heating up, I would drill and tap a padeye to the top of the track and attach the main sheet and start pulling straight up. Of course you will have to attach your main halyard to the boom, but a reasonable amount of steady pressure, combined with the slow heating of track should break the seal of 5200. 5200 has a upper temperature service limit of 190 degrees (http://multimedia.3m...s6EVs6E666666--), so it wont take much for the material to soften up and let go.
I think that slow heating and reasonable amounts of vertical pressure should lift that off with no damage to the surrounding paintwork; dont rush it.
Bam Miller
#60
Posted 01 December 2011 - 12:29 PM
#61
Posted 19 December 2011 - 06:46 AM
#62
Posted 22 December 2011 - 03:26 AM
I know this doesn't apply here, but the best thing to do with 5200 is leave it in the tube or take it back to the store. I once saw a guy remove all his keel bolts and still could not get the keel off -- 5200.
#63
Posted 22 December 2011 - 04:35 AM
Has anyone ever considered passing a current through a track so that it becomes the heater element? It might take a welding power supply to do it though. I know the resistance would be very low so the current would need to be high and the voltage low. May not be practical but it would get the heat where you want it.
I know this doesn't apply here, but the best thing to do with 5200 is leave it in the tube or take it back to the store. I once saw a guy remove all his keel bolts and still could not get the keel off -- 5200.
Chainsaw time.
#64
Posted 23 December 2011 - 09:48 PM
Ran out of time to get started on it and am now out of the country for a couple of weeks. Will see if I can tackle it the last weekend of the year.
Thought about the electricity to heat it up but quickly dismissed it as the most likely way of killing myself.
#65
Posted 23 December 2011 - 10:32 PM
Sorry for keeping everyone on the edge of their seats...
Ran out of time to get started on it and am now out of the country for a couple of weeks. Will see if I can tackle it the last weekend of the year.
Thought about the electricity to heat it up but quickly dismissed it as the most likely way of killing myself.
The voltage you would need to heat it would be very low so you would not electrocute yourself. You could, however, burn yourself to death if it did work :-)
A car battery would be a great source of current if you could find out if the battery would blow up if you short it out. Hey, another way to kill yourself. Maybe you are right.
Best of luck, it sounds like a very difficult task.
Allen
#66
Posted 25 December 2011 - 06:36 AM
Sorry for keeping everyone on the edge of their seats...
Ran out of time to get started on it and am now out of the country for a couple of weeks. Will see if I can tackle it the last weekend of the year.
Thought about the electricity to heat it up but quickly dismissed it as the most likely way of killing myself.
The voltage you would need to heat it would be very low so you would not electrocute yourself. You could, however, burn yourself to death if it did work :-)
A car battery would be a great source of current if you could find out if the battery would blow up if you short it out. Hey, another way to kill yourself. Maybe you are right.
Best of luck, it sounds like a very difficult task.
Allen
Do not under ANY circumstance attempt to use a battery or electricity to heat that up. They used to use aluminum in wires back in the 40's when copper was scarce. It's a good conductor. A boat battery will put out enough amperage to spot-weld the wires to the aluminum, and then you'll get either a nice fire, or a wonderful explosion.
#67
Posted 25 December 2011 - 07:13 AM
Sorry for keeping everyone on the edge of their seats...
Ran out of time to get started on it and am now out of the country for a couple of weeks. Will see if I can tackle it the last weekend of the year.
Thought about the electricity to heat it up but quickly dismissed it as the most likely way of killing myself.
The voltage you would need to heat it would be very low so you would not electrocute yourself. You could, however, burn yourself to death if it did work :-)
A car battery would be a great source of current if you could find out if the battery would blow up if you short it out. Hey, another way to kill yourself. Maybe you are right.
Best of luck, it sounds like a very difficult task.
Allen
Do not under ANY circumstance attempt to use a battery or electricity to heat that up. They used to use aluminum in wires back in the 40's when copper was scarce. It's a good conductor. A boat battery will put out enough amperage to spot-weld the wires to the aluminum, and then you'll get either a nice fire, or a wonderful explosion.
Well, if anything was going to explode it would be the battery, which is why I said I wouldn't try it without knowing from someone who had tried it that it would work. As you said, aluminum is a good conductor, almost as good as copper. A traveler rail also has a good cross section so the resistance would be very low. That means to get several hundred watts into it you are going to need a lot of current. Power is I^2 x R and if R is low, I has to be high. And now that I think of it, it is likely that the traveler is going to be lower resistance than the wires used to attach to it and in that case it is going to be the wires that get hot so just forget the whole thing.
Allen
#68
Posted 26 December 2011 - 04:00 PM
#69
Posted 26 December 2011 - 05:31 PM
I looked at a cheap arch welder and it puts out 200 amps. Using that you could get 4 watts of heating into our hypothetical traveler. That might not be enough and it might be hard on the welder, which might require 220 volts.
The battery could probably deliver more current than the arc welder but it would probably explode or catch fire at these levels. I wouldn't try it.
In summary, use a grinder.
#70
Posted 26 December 2011 - 06:55 PM
I did a rough calculation, just an order of magnitude thing. Resistivity of Aluminum is 2.7x10-8ohm-meters. Assume traveler is 1 square inch cross section or 6.5x10-4 square meters. Assume traveler is 2 meters long. Then the resistance is 2.7x10-8 x 2 / 6.5x10-4 or .83x10-4 ohms. Call it 10-4 ohms. If we want to heat it with 100 watts then we need to use the equation for power of P = I^2 x R so the current is sqrt ( P / R) or sqrt ( 10^2 / 10^4) or 1,000 amps. To get 1,000 amps through 10-4 ohms we need 0.1 volts.
I looked at a cheap arch welder and it puts out 200 amps. Using that you could get 4 watts of heating into our hypothetical traveler. That might not be enough and it might be hard on the welder, which might require 220 volts.
The battery could probably deliver more current than the arc welder but it would probably explode or catch fire at these levels. I wouldn't try it.
In summary, use a grinder.
Nice Calculations. Do Not Attempt To heat the track using current!!! If you do it will become the element in a very large flash bulb reaction. Unless that is there is some other weak link like the wiring which would need to be MT250 (1.5 inch diameter) or the source Car battery (Boom).
It can be done using a Step up transformer of say 500VA ($$$) and a proper resister 6K Ohm in line after the track rated for the output of the Transformer like an array of several Pringle can sized ones used to regulate the charge rate of large UMGE vehicles. So like 10 grand and an engineer like Allen or!
One of these will work perfectly. http://www.mcmaster....heaters/=fj7dg5
If you don't have a temp controller, they can get very hot if you oversize them, so again use a heat gun and start at the end like I suggested, It works, I've used the method on brand new Deliveries to upgrade the exact system your doing on some very pricey boats.
#71
Posted 26 December 2011 - 07:59 PM
I did a rough calculation, just an order of magnitude thing. Resistivity of Aluminum is 2.7x10-8ohm-meters. Assume traveler is 1 square inch cross section or 6.5x10-4 square meters. Assume traveler is 2 meters long. Then the resistance is 2.7x10-8 x 2 / 6.5x10-4 or .83x10-4 ohms. Call it 10-4 ohms. If we want to heat it with 100 watts then we need to use the equation for power of P = I^2 x R so the current is sqrt ( P / R) or sqrt ( 10^2 / 10^4) or 1,000 amps. To get 1,000 amps through 10-4 ohms we need 0.1 volts.
I looked at a cheap arch welder and it puts out 200 amps. Using that you could get 4 watts of heating into our hypothetical traveler. That might not be enough and it might be hard on the welder, which might require 220 volts.
The battery could probably deliver more current than the arc welder but it would probably explode or catch fire at these levels. I wouldn't try it.
In summary, use a grinder.
Nice Calculations. Do Not Attempt To heat the track using current!!! If you do it will become the element in a very large flash bulb reaction. Unless that is there is some other weak link like the wiring which would need to be MT250 (1.5 inch diameter) or the source Car battery (Boom).
It can be done using a Step up transformer of say 500VA ($$) and a proper resister 6K Ohm in line after the track rated for the output of the Transformer like an array of several Pringle can sized ones used to regulate the charge rate of large UMGE vehicles. So like 10 grand and an engineer like Allen or!
One of these will work perfectly. http://www.mcmaster....heaters/=fj7dg5
If you don't have a temp controller, they can get very hot if you oversize them, so again use a heat gun and start at the end like I suggested, It works, I've used the method on brand new Deliveries to upgrade the exact system your doing on some very pricey boats.
Actually, you want a step down transformer because you need low voltage and high current and low resistance wire like maybe 10/0 but let's just not go there.
Just follow the voice of experience above, use the heat gun, and don't listen to me on this :-) Just be careful you don't point the heat gun at your deck and do some serious damage.
Allen
#72
Posted 26 December 2011 - 10:02 PM
Somewhere, in prowling the web, I've seen grit-coated wire, in spooled lengths of several feet. Local hobby stores stock it cut into 4-5 inch lenghts as refills for jeweler's saws. Dunno if that can work for the situation you've got, but it might be worth looking into. If you can get a loop of it around the end of the track and work towards the footwell, it should cut the glue instead of the track.
G4B
#73
Posted 27 December 2011 - 05:24 PM
I did a rough calculation, just an order of magnitude thing. Resistivity of Aluminum is 2.7x10-8ohm-meters. Assume traveler is 1 square inch cross section or 6.5x10-4 square meters. Assume traveler is 2 meters long. Then the resistance is 2.7x10-8 x 2 / 6.5x10-4 or .83x10-4 ohms. Call it 10-4 ohms. If we want to heat it with 100 watts then we need to use the equation for power of P = I^2 x R so the current is sqrt ( P / R) or sqrt ( 10^2 / 10^4) or 1,000 amps. To get 1,000 amps through 10-4 ohms we need 0.1 volts.
I looked at a cheap arch welder and it puts out 200 amps. Using that you could get 4 watts of heating into our hypothetical traveler. That might not be enough and it might be hard on the welder, which might require 220 volts.
The battery could probably deliver more current than the arc welder but it would probably explode or catch fire at these levels. I wouldn't try it.
In summary, use a grinder.
Nice Calculations. Do Not Attempt To heat the track using current!!! If you do it will become the element in a very large flash bulb reaction. Unless that is there is some other weak link like the wiring which would need to be MT250 (1.5 inch diameter) or the source Car battery (Boom).
It can be done using a Step up transformer of say 500VA ($) and a proper resister 6K Ohm in line after the track rated for the output of the Transformer like an array of several Pringle can sized ones used to regulate the charge rate of large UMGE vehicles. So like 10 grand and an engineer like Allen or!
One of these will work perfectly. http://www.mcmaster....heaters/=fj7dg5
If you don't have a temp controller, they can get very hot if you oversize them, so again use a heat gun and start at the end like I suggested, It works, I've used the method on brand new Deliveries to upgrade the exact system your doing on some very pricey boats.
Actually, you want a step down transformer because you need low voltage and high current and low resistance wire like maybe 10/0 but let's just not go there.
Just follow the voice of experience above, use the heat gun, and don't listen to me on this :-) Just be careful you don't point the heat gun at your deck and do some serious damage.
Allen
Allen you are absolutely right that your ratios of voltage current and resistance will work. the trouble is we are trying not to kill the poor fucker doing the work. many combinations of Current voltage and resistance can do the job but you need to design to the Electrical engineering concept of finger safe. you don't want to explode if you touch it in other words.
OSHA Agrees- http://www.osha.gov/...leccurrent.html
My reasoning for the big voltage, and big resistors was to keep the Current low, real low.
The electrical resistance of the human body depends on the condition of your skin at the time of measurement. If your skin is wet, you could have a resistance of only about 1100 Ohms. With dry skin, the amount is much higher at around 495,000 Ohms.
When working with any kind of electricity, you need to make sure you are staying dry as we discovered above. If you get shocked while wet, you are much more likely to feel the jolt, and in some cases this can be the difference between life and death. Now let's discuss the reason that getting shocked could lead to death. Whenever you hear on the news or internet, "Oh wow, he just got shocked by 50,000 volts", how in the world is he still alive? Well here is the answer to this time aged question.
The amount of voltage is not the issue, it's the amount of current (amperage) introduced into the human body that can kill. It only takes about .015 amps across the heart to kill a person.That's it, .015 amps!(See Linky above) So the bottom line is no matter how little the voltage might be, its the current (Amperage) that will kill you. Have fun, BE SAFE, and always respect electricity.
Allen i'm just having fun So I decided to go there.
Cheers happy new year.
#74
Posted 27 December 2011 - 06:08 PM
I did a rough calculation, just an order of magnitude thing. Resistivity of Aluminum is 2.7x10-8ohm-meters. Assume traveler is 1 square inch cross section or 6.5x10-4 square meters. Assume traveler is 2 meters long. Then the resistance is 2.7x10-8 x 2 / 6.5x10-4 or .83x10-4 ohms. Call it 10-4 ohms. If we want to heat it with 100 watts then we need to use the equation for power of P = I^2 x R so the current is sqrt ( P / R) or sqrt ( 10^2 / 10^4) or 1,000 amps. To get 1,000 amps through 10-4 ohms we need 0.1 volts.
I looked at a cheap arch welder and it puts out 200 amps. Using that you could get 4 watts of heating into our hypothetical traveler. That might not be enough and it might be hard on the welder, which might require 220 volts.
The battery could probably deliver more current than the arc welder but it would probably explode or catch fire at these levels. I wouldn't try it.
In summary, use a grinder.
Nice Calculations. Do Not Attempt To heat the track using current!!! If you do it will become the element in a very large flash bulb reaction. Unless that is there is some other weak link like the wiring which would need to be MT250 (1.5 inch diameter) or the source Car battery (Boom).
It can be done using a Step up transformer of say 500VA ($) and a proper resister 6K Ohm in line after the track rated for the output of the Transformer like an array of several Pringle can sized ones used to regulate the charge rate of large UMGE vehicles. So like 10 grand and an engineer like Allen or!
One of these will work perfectly. http://www.mcmaster....heaters/=fj7dg5
If you don't have a temp controller, they can get very hot if you oversize them, so again use a heat gun and start at the end like I suggested, It works, I've used the method on brand new Deliveries to upgrade the exact system your doing on some very pricey boats.
Actually, you want a step down transformer because you need low voltage and high current and low resistance wire like maybe 10/0 but let's just not go there.
Just follow the voice of experience above, use the heat gun, and don't listen to me on this :-) Just be careful you don't point the heat gun at your deck and do some serious damage.
Allen
Allen you are absolutely right that your ratios of voltage current and resistance will work. the trouble is we are trying not to kill the poor fucker doing the work. many combinations of Current voltage and resistance can do the job but you need to design to the Electrical engineering concept of finger safe. you don't want to explode if you touch it in other words.
OSHA Agrees- http://www.osha.gov/...leccurrent.html
My reasoning for the big voltage, and big resistors was to keep the Current low, real low.
The electrical resistance of the human body depends on the condition of your skin at the time of measurement. If your skin is wet, you could have a resistance of only about 1100 Ohms. With dry skin, the amount is much higher at around 495,000 Ohms.
When working with any kind of electricity, you need to make sure you are staying dry as we discovered above. If you get shocked while wet, you are much more likely to feel the jolt, and in some cases this can be the difference between life and death. Now let's discuss the reason that getting shocked could lead to death. Whenever you hear on the news or internet, "Oh wow, he just got shocked by 50,000 volts", how in the world is he still alive? Well here is the answer to this time aged question.
The amount of voltage is not the issue, it's the amount of current (amperage) introduced into the human body that can kill. It only takes about .015 amps across the heart to kill a person.That's it, .015 amps!(See Linky above) So the bottom line is no matter how little the voltage might be, its the current (Amperage) that will kill you. Have fun, BE SAFE, and always respect electricity.
Allen i'm just having fun So I decided to go there.
Cheers happy new year.
OK, as long as we are going there, your example of 500 volts (you said VA but I assume you meant volts) and 6000 ohms is enough to kill someone (.08 amps). So basically you have a good idea but went in the wrong direction. You want to limit the voltage to a very low level. Then it doesn't matter that the step down transformer can source 1000 amps, it cannot put that through the human body because the resistance of the human body will keep the current low. We all know that a 12 volts is safe and 120 volts is not even though the 12 volt starter battery can source hundreds of amps. Keep the voltage low to keep the circuit safe.
I don't really want to hijack the thread with this discussion but as suggesting 500 volts with 6000 ohms could actually kill someone I thought perhaps I should comment. If anyone does want to heat up a strip of metal using current, keep the voltage low and use something that will not blow up to do it. In the case of the traveler, this probably does not exist so the other ideas, a strip heater or a blow dryer heater are superior ideas.
Happy New Year to all.
Allen
#75
Posted 27 December 2011 - 08:02 PM
No Snow and and the boats are put up for the season!!
PS from Wiki
A volt-ampere (VA) is the unit used for the apparent power in an electrical circuit, equal to the product of root-mean-square (RMS) voltage and RMS current.[1] In direct current (DC) circuits, this product is equal to the real power (active power) [2] in watts. Volt-amperes are useful only in the context of alternating current (AC) circuits (sinusoidal voltages and currents of the same frequency).
While both the volt-ampere (abbreviated VA) and the watt have the dimension of power (time rate of energy), they do not have the same meaning. Some devices, includingUninterruptible Power Supplies (UPSs), have ratings both for maximum volt-amperes and maximum watts.
The VA rating is limited by the maximum permissible current, and the watt rating by the power-handling capacity of the device. When a UPS powers equipment which presents a reactive load with a low power factor, neither limit may safely be exceeded.
#76
Posted 27 December 2011 - 08:26 PM
All mechanical and not likely to blow yourself up with from what I can see.
Best of luck and make sure you report back
HW
#77
Posted 29 December 2011 - 03:48 PM
he gets back and sign the work order love mainsheet track removal
fairy
#78
Posted 29 December 2011 - 05:39 PM
#79
Posted 29 December 2011 - 07:20 PM
#80
Posted 30 December 2011 - 04:11 AM
You guys realize he cannot get the guitar wire past the first bolt. If he could get the bolts out this would be easy but they are captured somehow inside the track. Seems odd to me as most things can be disassembled because they were assembled.
You are obviously correct but the key diff between assembly and dis assembly is half the worlds supply of 5200..... Without that it would be easy.
Looks like this - you can see where the bolt heads go.
http://www.harkenindustrial.com/mm5/merchant.mvc?Screen=PROD&Store_Code=hi&Product_Code=2721-3-6m
Will see if I can apply pressure to both sides and eat this weekend..... Unless te track fairy came.
When patience runs out I will get destructive.
#81
Posted 30 December 2011 - 06:50 AM
You guys realize he cannot get the guitar wire past the first bolt. If he could get the bolts out this would be easy but they are captured somehow inside the track. Seems odd to me as most things can be disassembled because they were assembled.
You are obviously correct but the key diff between assembly and dis assembly is half the worlds supply of 5200..... Without that it would be easy.
Looks like this - you can see where the bolt heads go.
http://www.harkenind..._Code=2721-3-6m
Will see if I can apply pressure to both sides and eat this weekend..... Unless te track fairy came.
When patience runs out I will get destructive.
Nige, I am surprised no one has suggested a small amount of semtex
Yeah OK I'm gone....
Cheers,
Jim
#82
Posted 30 December 2011 - 11:59 AM
I would also suggest that you cut off as much of the track that is spanning the cockpit; no sense having more aluminum to heat that necessary.
Bam Miller
#83
Posted 30 December 2011 - 06:20 PM
.png)
on a boat a couple of slips down. Seems the guy couldn't get his engine to start, but now it runs like a champ.
Could have just been a coincidence though.
#84
Posted 30 December 2011 - 07:11 PM
I still think this is a matter of time, heat and force. If you slowly heat the track, the bolts that are going through the deck will also get hot, and all the 5200 will lose its adhesive qualities at less than the temperature of boiling water. Apply a vertical force of 500 lbs to the top of the tracks and let it sit all day. Eventually the track and connecting bolts will lift off; you just have to be patient.
I would also suggest that you cut off as much of the track that is spanning the cockpit; no sense having more aluminum to heat that necessary.
Bam Miller
Yep - constant pressure and time is the key (although heat can be necessary if it is really cold). Same when taking off a keel that has been 5200'ed in place: Take off the keel nuts, remove a bit of the support under the keel (leave a 1-2" gap) - go to lunch, and the keel will 9 times out of 10 be sitting down on the support when you come back.
This is also the reason 5200 is NOT a good adhesive for joints that are under constant stress in one direction
#85
Posted 31 December 2011 - 02:35 PM
Good luck. Heat, tension, and time will probably prevail.
US 307
#86
Posted 18 January 2012 - 03:49 PM
#87
Posted 18 January 2012 - 03:57 PM
I would have guessed the aluminum would be a great conductor to get the heat to exactly where you want it.I still think this is a matter of time, heat and force. If you slowly heat the track, the bolts that are going through the deck will also get hot, and all the 5200 will lose its adhesive qualities at less than the temperature of boiling water. Apply a vertical force of 500 lbs to the top of the tracks and let it sit all day. Eventually the track and connecting bolts will lift off; you just have to be patient.
I would also suggest that you cut off as much of the track that is spanning the cockpit; no sense having more aluminum to heat that necessary.
Bam Miller
#88
Posted 18 January 2012 - 06:53 PM
Services are pending.
#89
Posted 18 January 2012 - 06:56 PM
I regret to report that due to the extensive amount of time that this has been under discussion and not under action, Nige has died of old age.
Services are pending.
Not dead yet but cant argue with all talk no action.
Had to go on the road as soon as I got back, wife is away for a few days so might be able to find time this weekend to get the pressure on...
Sorry to keep everyone waiting on this thrilling drama but fear not, I will update when I have pulled my finger out!
#90
Posted 18 January 2012 - 06:59 PM
#91
Posted 18 January 2012 - 07:02 PM
not this weekend - you guys have the fluffy white stuff falling….
Its meant to just be the wetter variety by the weekend. 6 inches so far this morning though.
#92
Posted 18 January 2012 - 10:18 PM
#93
Posted 19 January 2012 - 07:36 AM
#94
Posted 19 January 2012 - 06:52 PM
Lets get-er-done!
Snow, pftt....
#95
Posted 19 January 2012 - 08:04 PM
not this weekend - you guys have the fluffy white stuff falling….
Its meant to just be the wetter variety by the weekend. 6 inches so far this morning though.
The snow will just keep everything else from melting once it starts heating up..
#96
Posted 19 January 2012 - 10:52 PM
Cheers,
Jim
#97
Posted 22 January 2012 - 09:03 PM
I used 4 bottle car jacks and some iron C channel to push the bolts/track up from below. Once the pressure was applied, it only took a few hours for the tack to start popping up. I had to then use a jack and a 3/th bolt to push the bolts past flush with the bottom of the deck.
It did not take any heat.
Now I just need to clean up the residue - will get a can of the stuff recommended earlier.
Thanks for all the suggestions- the track is off with no damage to the boat or track.
#98
Posted 22 January 2012 - 11:02 PM
Ordered any new sails?
#99
Posted 22 January 2012 - 11:04 PM
Congrats, dude.
Ordered any new sails?
Dan came up to measure for a new main last week... a couple of months apparently...
#100
Posted 23 January 2012 - 02:06 AM
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