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    • UnderDawg

      A Few Simple Rules   05/22/2017

      Sailing Anarchy is a very lightly moderated site. This is by design, to afford a more free atmosphere for discussion. There are plenty of sailing forums you can go to where swearing isn't allowed, confrontation is squelched and, and you can have a moderator finger-wag at you for your attitude. SA tries to avoid that and allow for more adult behavior without moderators editing your posts and whacking knuckles with rulers. We don't have a long list of published "thou shalt nots" either, and this is by design. Too many absolute rules paints us into too many corners. So check the Terms of Service - there IS language there about certain types of behavior that is not permitted. We interpret that lightly and permit a lot of latitude, but we DO reserve the right to take action when something is too extreme to tolerate (too racist, graphic, violent, misogynistic, etc.). Yes, that is subjective, but it allows us discretion. Avoiding a laundry list of rules allows for freedom; don't abuse it. However there ARE a few basic rules that will earn you a suspension, and apparently a brief refresher is in order. 1) Allegations of pedophilia - there is no tolerance for this. So if you make allegations, jokes, innuendo or suggestions about child molestation, child pornography, abuse or inappropriate behavior with minors etc. about someone on this board you will get a time out. This is pretty much automatic; this behavior can have real world effect and is not acceptable. Obviously the subject is not banned when discussion of it is apropos, e.g. talking about an item in the news for instance. But allegations or references directed at or about another poster is verboten. 2) Outing people - providing real world identifiable information about users on the forums who prefer to remain anonymous. Yes, some of us post with our real names - not a problem to use them. However many do NOT, and if you find out someone's name keep it to yourself, first or last. This also goes for other identifying information too - employer information etc. You don't need too many pieces of data to figure out who someone really is these days. Depending on severity you might get anything from a scolding to a suspension - so don't do it. I know it can be confusing sometimes for newcomers, as SA has been around almost twenty years and there are some people that throw their real names around and their current Display Name may not match the name they have out in the public. But if in doubt, you don't want to accidentally out some one so use caution, even if it's a personal friend of yours in real life. 3) Posting While Suspended - If you've earned a timeout (these are fairly rare and hard to get), please observe the suspension. If you create a new account (a "Sock Puppet") and return to the forums to post with it before your suspension is up you WILL get more time added to your original suspension and lose your Socks. This behavior may result a permanent ban, since it shows you have zero respect for the few rules we have and the moderating team that is tasked with supporting them. Check the Terms of Service you agreed to; they apply to the individual agreeing, not the account you created, so don't try to Sea Lawyer us if you get caught. Just don't do it. Those are the three that will almost certainly get you into some trouble. IF YOU SEE SOMEONE DO ONE OF THESE THINGS, please do the following: Refrain from quoting the offending text, it makes the thread cleanup a pain in the rear Press the Report button; it is by far the best way to notify Admins as we will get e-mails. Calling out for Admins in the middle of threads, sending us PM's, etc. - there is no guarantee we will get those in a timely fashion. There are multiple Moderators in multiple time zones around the world, and anyone one of us can handle the Report and all of us will be notified about it. But if you PM one Mod directly and he's off line, the problem will get dealt with much more slowly. Other behaviors that you might want to think twice before doing include: Intentionally disrupting threads and discussions repeatedly. Off topic/content free trolling in threads to disrupt dialog Stalking users around the forums with the intent to disrupt content and discussion Repeated posting of overly graphic or scatological porn content. There are plenty web sites for you to get your freak on, don't do it here. And a brief note to Newbies... No, we will not ban people or censor them for dropping F-bombs on you, using foul language, etc. so please don't report it when one of our members gives you a greeting you may find shocking. We do our best not to censor content here and playing swearword police is not in our job descriptions. Sailing Anarchy is more like a bar than a classroom, so handle it like you would meeting someone a little coarse - don't look for the teacher. Thanks.

clivee1

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About clivee1

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  1. Hi Michele, I am glad you liked the Cherubs. You should have introduced your self. See you next year. Clive
  2. And power will go up with V cubed
  3. Try direct heating. If you can get a large soldering iron on them, preferably with a bit of silver solder to make a wetted thermal contact the heat will soon break down any glue. The heat will not conduct far into the fibreglass. The resin breakdown will be at the interface to the stainless.
  4. And increase righting moment. Touchdown could be interesting. Greenbird did it effectively for the land sail record.
  5. We could pull the leeward shroud on rather than letting the windward one off. Still wound not make tacking any quicker.
  6. Hi Simon, It is certainly possible. It would add a lot of complexity that I am not keen on and would do nothing to speed up our tacks. I has also considered canting the foil by letting the leeward dagger board rise a bit. A more practical solution might be to attacher our trap lines much lower down the mast. Plan A is to do more sailing this year. It was in the garage for a lot of last year and early on a lot of days were missed waiting for easy conditions. Clive
  7. I designed the 600 this is not a 600.
  8. Unfortunately Seats are banned. Though I do want to sail a Canoe before I am much too old. I suspect that it really needs practice and possibly someone younger on the helm. Looking at the Pics we should be able to get the mast tip a meter to windward and still have significant pressure holding us to the gunwale even without sheet loads. We are finding that the roll rates are a lot faster than when low riding. Our rigs are very light. If we crack off slightly in a header, whilst going up wind the higher CoG whilst foiling makes it roll to windward much faster and similarly to leeward when luffing. It therefore requires a lot more action on the main. At the moment I am still playing the main. It is a skill Alex has not yet learnt. We tried swapping earlier this year but I suspect that it would be better if he tried it in something like a 29er rather than a foiling Cherub to start with. One advantage of trapezing is that whilst clipped on you cannot get near the foils. Our next mod is going to be to move the mast step forward and sail with a smaller jib, bigger main and a more raked mast so that we do not have to move aft as much during gybes. We have successfully gybed on the foils a couple of times but the transom collapses 99% of the time.
  9. It would be great to know a bit more about this boat. It is fantastic to see people trying new solutions. The additional righting moment from having the foil to leeward looks useful. Also looks very useful having the angle on the leeward foil so that the lift is vectored in the right sort of direction. As RobG said it might need more. At least the main foil is not dragging you to leeward as soon as you heel. We are finding it very hard in the Cherub hang on when heeled to windward but the more windward heel we get the faster it goes. My experience is that the heave stability generated from surface piercing dihedral is not as positive as a wand controlled system. We were not able to race until we had sorted the control. Our foil tips are in a similar position though not as far out. We do not feel unduly threatened by them. We are far more scared of a potential high speed impact with the rig. I agree that there has been limited success with 2 man foilers but there has been limited development effort put in by a very few people. We are at a stage with the Cherub where we can win races, at times by significant distance, but are not yet consistent enough through an event.
  10. UK Cherubs Foiling in Class with twin wires and 14 year old crew.
  11. Thanks Clive. Very helpful. Couple questions for you: A. What was the wind speed that day? B. Were you in an Aero? Rig size (5, 7, or 9)? C. Mind me asking your weight? D. X axis = distance traveled; Y axis = boat speed, right? E. Do you optimize control lines for the tack you're on? (upwind vs. reaching vs. downwind)? I admit to being a lazy sailor that optimizes control lines for the first 15 minutes or so and then says "screw it - I'll just put them all at some generic setting and forget about it." I'm just asking so that I can get a feel for how much better I might be able to do by optimizing control line settings. Wind speed 15 to 25 kts. Quite gusty. Aero 7. I normally sail the 9. There was a 9 out. Very little difference in performance. the 7 was faster upwind. 90kg D. Correct E. Yes. Not much gain in real terms but crucial if racing.
  12. Recorded GPS speed profile for a sail in Chichester Harbour when HISC club racing was called off 31/5/2015.
  13. The water is getting cold, its viscosity is higher, the flow does not stay attached. Move somewhere hot.
  14. We fitted a mk 2 foil to our Cherub for our recent nationals. This had an increase in span from 1450mm to 1750mm just below our max beam. We reduced the area very slightly to 0.204m^2. We modified the camber line on the DAE41 section to add some reflex to reduce the movement of the Cp with changes in Cl. The increase in Aspect ratio makes it a bit less practical. We need help lifting it off the Combi trailer and have to be careful when rolling to rig. It should have significantly less induced drag at take off and at upwind speeds. We got to sail with it once before the nationals. It was quite clear that light weather take off had been improved. With the 9m code zero kite we can possibly fly in less wind than the Moths. Without it we need a little bit more. It was also clear that the changes to the camber line have helped and that we could run with less wand pressure and still retain control during take off etc. At the Nationals we were unlucky with the conditions. On the first 2 days we had near drifting conditions. Occasional we could get foiling downwind but were pretty uncompetitive. On the third day we had some wind. We won the first race convincingly whilst being very cautions. For the second race the wind dropped. Somehow we got to the windward mark third without foiling but lost a lot downwind with the small kite. On the last lap the wind returned .We took off and got back to 3rd. We were leading the next race when the jib cleat fell off. A part that had been there for three years and had nothing to do with the foils. On the final day it was 20+ kts and large waves so we went surfing. When flying we are faster than the conventional boats but not by a huge margin. At every design choice we have chosen ease of use and extended wind range over speed. There is a lot of refinement that we can do. 'Conventional' UK Cherubs are not slow boats in medium conditions. Looking at the photos we need to try shortening our trap lines and sailing with a bit of windward heal. Since the nationals we have managed to win am open pursuit race in perfect conditions at Hayling starting 10 minutes after the 29ers.
  15. I have not updated for some time. We did not do much over the winter but this summer have been steadily developing the boat. Most of the work has been in controlling the stretch in the control system. Getting the tail plane set right. It is now all glued up and faired in. Adjusting wand length and gearing. We still have a long way to go in terms of learning how to sail to its potential. We have had a 9m code zero style kite made from 1.5oz cloth. The normal kites are 23m and half the cloth weight. We have found that we need to run a lot of load on the wand or else it can become unloaded during take off or in waves. It is clear that the centre of lift moves around a lot, especially under transient conditions. This will not be a surprise to anyone that ever used an original Windsurfer regatta sail. We have started making a MK2 main foil. The Span is increasing from 1.45 to 1.75m. Just inside the gunwale beam. The area is dropping slightly and the cord significantly. We have modified the section to put a reflex in the camber line to try and stabilise the centre of pressure. Hopefully these mods will allow us to run with lower wand load and no tailplane. We hope to complete it in time for the nationals in mid August. We take off in similar wind strengths to the moths and have been out when gusting 20kts+. Last weekend we completed 2 in race foiling gybes for the first time. So far we have only tried to do 4 races. We are still very slow in manoeuvres. Particularly tacking and at leeward marks if we do not line up correctly. Our speed around the course has so far been similar to no foils but at times we are much faster. In the races that we have done the courses have been short and restricted. Sailing up wind fast is hard. As soon as you get windward heel the speed increases dramatically. It becomes very difficult to stay on the gunwale. If you try and steer to shifts and gusts the centrifugal roll rates are much faster than before due to the increased height and speed. A the sheets have to be worked much harder than before. We have some on-board video clips but unfortunately no external ones. https://youtu.be/_l7PtVJQRJg https://youtu.be/o0yrJBhxOfU https://youtu.be/XAyU8LjikBg https://youtu.be/-y-FDQVSId4