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Some of you will have read my other post a few months back.
Took a Ross 930 and put a Mumm 30 rig in it.
We are using the stock Mumm sail plan.
Ross 930 were usually retrofit with a 250 lbs bulb on the keel as it a fairly narrow boat with not much righting moment.
We just have the stock lead fin with no bulb.
Our ballast is about 1500lbs. A Mumm 30 has about 2000lbs. The Mumm is a wider boat too and the keel is a blade with a lead bulb.
I want to look at getting a different keel to put on the boat. I have been in touch with Mars Metals and they don't seem to have a quite what I want... although if did get one designed they might be a great place to have it made.
Who has the Mumm 30 keel molds in North America?
Any other ideas?
I may end up having to have a keel designed and built, but I am hoping there might be an existing shape and mold.....
Any ideas?
Mark
New keel lookin' for a new keel
MultiQuote
#2
jeff E of the GWN 
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Posted 22 March 2004 - 09:26 PM
did mars have any bulbs on hand ??? called them awhile back bu they had nothing at that time .
#5
Bull Gator
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Posted 23 March 2004 - 02:51 AM
If you get the molds you can save yourself some money buy pouring yourself...
Or find someone local to do it..
I've heard Mars is a joke...
Or find someone local to do it..
I've heard Mars is a joke...
#7
Jeff K
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Posted 23 March 2004 - 03:16 AM
[QUOTE]Mars Metals is a fucking cruel joke. They make Hunter keels! that is the quality you can expect, hunter type quality, thats it.
I'm not sure what's going on now but they did a hell of a job designing and building a sweet keel for me. They used a senergy keel as a base and adapted it to fit my boat (carrera 290). I won't talk about what happened to the factory one...
Anyway I'll have to hit the bullshit button on the famous (GUEST) post. Nothing but a positive from me about Mars. sy jeff
I'm not sure what's going on now but they did a hell of a job designing and building a sweet keel for me. They used a senergy keel as a base and adapted it to fit my boat (carrera 290). I won't talk about what happened to the factory one...
Anyway I'll have to hit the bullshit button on the famous (GUEST) post. Nothing but a positive from me about Mars. sy jeff
#9
Jeff K
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Posted 23 March 2004 - 03:36 AM
dude, not sure but I can look it up but no lifting. it was 1.5 inches shorter and had a lighter bulb but the trunk was made out of stainless which made the overall weight a little heavier. Mars did send me a letter saying the COE was approx. 10" higher than the orginal. The phrf committee still hit the boat (1 of 4 times in 3 years). Stiffer was a plus and not breaking off was also nice... I can't say enough good things about Mars in my dealings with them. Now I'm sure some guest will call me out as an hack... sy jeff
#11
Jeff K
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Posted 23 March 2004 - 03:44 AM
dude, i take it, the sail made it up? we did the first regatta for the sr and came home with a really big pickle dish. kinda proud... sy jeff
btw; what are odds of Jody's boat making to kw next year? I say 20-80... but your closer. sy jeff
btw; what are odds of Jody's boat making to kw next year? I say 20-80... but your closer. sy jeff
#17 Guest Anarchist Guest Anarchist Mark_*
Posted 23 March 2004 - 04:41 AM
Thanks for the responses.....
Any other stock boats with good keel shapes I should look at?
Any other stock boats with good keel shapes I should look at?
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#18
Heriberto
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Posted 23 March 2004 - 04:55 AM
What you are talking about is a pretty rad refit with a lot of extra load on the structure of the boat as well. You seem to be talking about increasing the keel moment by a VERY healthy percentage.
I would be very careful about what you are doing and would definitely get a designer involved. Design cost would be around 10% of the project and even less and could save you your entire investment in your boat. Start first with the original designer who would preferably tell you if it was even desireable to try this.
Beyond that, if you are willing to trash your current keel you already own the lead so the balance of the work would be in the design, implementation, shipping and installation. Ballpark would be 8-10K minimum unless you are remarkably skilled in boatwork which if you were, face it, you wouldn't be asking for advice here.
I would be interested to know opinions on Finkl and Mayville.
From what I understand about Mars, their design is a joke (the "add-a-bulb") but they make high-end keels just fine.
I would be very careful about what you are doing and would definitely get a designer involved. Design cost would be around 10% of the project and even less and could save you your entire investment in your boat. Start first with the original designer who would preferably tell you if it was even desireable to try this.
Beyond that, if you are willing to trash your current keel you already own the lead so the balance of the work would be in the design, implementation, shipping and installation. Ballpark would be 8-10K minimum unless you are remarkably skilled in boatwork which if you were, face it, you wouldn't be asking for advice here.
I would be interested to know opinions on Finkl and Mayville.
From what I understand about Mars, their design is a joke (the "add-a-bulb") but they make high-end keels just fine.
#19
Heriberto
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Posted 23 March 2004 - 04:57 AM
Guest Mark,
One more thing. Why don't you just go ahead and register? There is a quite extensive keel thread going on in Registered Anarchy.
One more thing. Why don't you just go ahead and register? There is a quite extensive keel thread going on in Registered Anarchy.
#20 Guest Anarchist fucking guest_*
Posted 23 March 2004 - 05:04 AM
Jeff K, on Mar 23 2004, 03:16 AM, said:
Anyway I'll have to hit the bullshit button on the famous (GUEST) post. Nothing but a positive from me about Mars. sy jeff
For all of those who have had positive dealings with Mars. What is the exact criteria you used to gauge the product? How does Mars know something is fair they don't use templates!
#21
jeff E of the GWN
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Posted 23 March 2004 - 05:37 AM
sorry that above post was me Jeff E not jeff K typo .... ;) :rolleyes:
#23
Seattle lite
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Posted 28 March 2004 - 12:24 AM
Heriberto, on Mar 27 2004, 11:43 PM, said:
Asking again, any info on Finkl and Mayville tool for steel fin and lead bulb one off?
I have never personaly dealt with Mayville but the word I have heard is that there main business is creating large dyes for metal pressings for the automitive industry. That is their first and foremost priority so there are times where keel builds suffer from un-expierenced workers working and the worst equipment they own. With that being said if Mayville tool is creating highly precise dyes they are very competent machinists and foundry people. I have heard positive reports on smaller keel projects which i would put your keel into the small category. Where are you located? have you looked into the fabricator in Mexico? or there is also a company in California called Champ. The steel fin portion opens up many many foundry's who deal with steel. The most important thing is to know exactly what you want so you know wether someone can make it for you.
#25
Heriberto
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Posted 28 March 2004 - 05:26 AM
Seattle lite, on Mar 27 2004, 07:24 PM, said:
I have never personaly dealt with Mayville but the word I have heard is that there main business is creating large dyes for metal pressings for the automitive industry. That is their first and foremost priority so there are times where keel builds suffer from un-expierenced workers working and the worst equipment they own. With that being said if Mayville tool is creating highly precise dyes they are very competent machinists and foundry people. I have heard positive reports on smaller keel projects which i would put your keel into the small category. Where are you located? have you looked into the fabricator in Mexico? or there is also a company in California called Champ. The steel fin portion opens up many many foundry's who deal with steel. The most important thing is to know exactly what you want so you know wether someone can make it for you.
I'm in Minnesota so these are places where shipping wouldn't be an issue since I could just drive a trailer down. That would be a considerable savings. Plus I could get them the lead I already own (my current keel). Does that really work in practice?
My current late 80's fin weighs 1350 and is about 5 feet. I would be looking at something just a bit deeper and a lighter. I'm actually a little torn about a bulb keel and no bulb and a lot deeper fin (that I can lift for launching).
I hadn't ever heard about a fabricator in Mexico.
So what is the opinion about steel fins with lead bulbs?
