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Topic: Carbon Iso |
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Neil Ashby |
Posted: 17-Jan-09 08:15 |
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Well we now have carbon booms and for anybody who hasnt tried one you really should.
Biggest advantage is the weight saving followed closely by the strength.
I am going to try out a carbon pole as well now, again the weight saving will be huge and better gust response too. Fairly in expensive , if it works well i wwill be puting forward a motion to adopt this as well.
Thirdly i would like to see a carbon space frame made up. Its not that technical to get made up but the weight savings combined with the other parts will be nearly 15kgs i reckon. This will make my iso well under a 100kgs with fittings.
That would increase the performance and make the boat far easier to sail as thr gust response again will be far better.
Would anybody else like to try out a carbon pole. it will only cost you the price of the tube which i think is about a 100 quid.
Neil 1195 |
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Colin Snook |
Posted: 17-Jan-09 11:44 |
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Yes yes yes - I need a new pole anyway, mines bent.
I was thinking of trying a glass pole that I have lying in the garden but a proper carbon one will be much better.
However, to get it to bend wouldn't you have to make it tapered?
Colin 1190 |
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Neil Ashby |
Posted: 17-Jan-09 12:19 |
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I dont think it would have be tapered to bend colin due to the size of the pole and the size of the kite, But feel happy to correct me if my calculations are way off. Not usaully thou 
Certainly food for thought thou for the future.
I will order one for you then colin once i have tested mine to make sure its up to the job.
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Ian Moss |
Posted: 17-Jan-09 18:52 |
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Definately sounds worth testing Neil. I cannot see any reason why the pole needs to bend other than when a real gust hits I would prefer the pole bend than the mast break. We have seen that haven't we Bob? Having said that the pole does seem hopelessly bendy at the moment so on a windy day the pole is already well bent; when the big gust hits I dont think it bends much more anyway.
Ian |
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jean luc |
Posted: 31-Jan-09 09:05 |
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Neil: I would definitively like to try the carbon pole. What are teh specifications for th ecarbon pole (inner/outer diameter and length). Are the standard fitting matching those specs?
Any progress on the carbon spaceframe?
Thanks, |
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Neil Ashby |
Posted: 01-Feb-09 07:40 |
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Progress so far and this isnt very easy is
That the pole we have at the moment are way to big in diameter when it comes to carbon, so ideally a smaller pole is required in diameter, at the moment the rs800 one would fit off the shelf , its the right length and similar loads, found the company that make them too, these are about 220 quid something like that.
The space frame is another whole project and short of me taking the boat to a carbon manufacturer its not going to happen, i am going to try and build one myself given the time , which would be considerable, cant be that difficult? probably yes knowing my luck.
back to the poles they would weigh in at less than half a kilo which is a good saving on the old beasts especially from the front of the boat.
Neil |
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tasarhans |
Posted: 18-Feb-09 23:01 |
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A huge improvement would make a carbom mast... lower weight, easier to keep the boat upright, better response...
Coming nearer to a RS800 performance should be nice...
But all in all... One would need another sailplan... compare the risk taken wirh the Boss... I respect the choices made by the Tech committee ....
Low cost is important, We are still happy with the Iso with the Hyde sails... |
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mmoncia |
Posted: 19-Feb-09 17:55 |
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Hi, I agree that ISO should be a low cost boat...
Said that, what about RudderBlade and Daggerboard ?
in my experience the are one of the items that breaks more easily (or at least, that most often needs to be replaced in used boat...)
I found a guy who offered to start from an existing blade to build new ones, either in FC or Carbon....I still don't have estimation of costs but I was told that price shouldn't change much depending of the type of fiber.
I was wondering if they would be class legal if made outside UK and if they can be make in carbon...
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Pete Lindley |
Posted: 20-Feb-09 07:09 |
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Personally I would get the length of the two reduced - mainly the rudder blade. There is no reason for it's long length.
A shorter blade would require you to sail the boat flatter as when it is heeled over the blade would come out of the water and with it being shorter, there would be no steerage. This sounds scary to the un-initiated, but look at it the other way round... A longer blade is more likely to split if it is not locked down (we know how heavy it is when you have just launched the boat). If it is not set correctly or used heavily when the boat is heeling over, there is more leverage on the blade, causing it to twist and load up, this results in breakage.
So shorter and stiffer blade it is (rudder at first, then dagger board).
Whilst we're at it, a carbon tiller - a couple of inches shorter than the one we have maybe?
Pete
[Edited by Pete Lindley on 20-Feb-09 07:09] |
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tasarhans |
Posted: 20-Feb-09 09:58 |
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I Used a Buzz Tiller on the ISO 788... More space for the helm.
I Agree with Rudder Length... or moreover... the construction of the rudder..
A system like the 49er rudder should be very nice... If not allowed shorter eventually with the same profile.... The 49 rudder system is simple, stiff and easy to handle (Rudder can't come up while sailing...
For the Weight: Weight of rudder and daggerboard is not so bad as long as the minimum weight is unchanged.
Lowering weight of the mast is more effective.
Hans |
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Greg Curtin |
Posted: 20-Feb-09 10:36 |
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After snapping my tiller last week end I have ordered a carbon tube from carbonolgy.com to try. I will definetly be cutting it short after borrowing one of a Spice to keep me on the water. A shorter tiller definitly gave more apce at the back of the boat. I should be trying it this weekend....
Greg 784 |
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Bob Ladell |
Posted: 20-Feb-09 11:04 |
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Greg - make sure you use loads of zinc paste between the carbon and the ally casting as well as any rivets, especially stainless.
Carbon is seriously active stuff and if you don't separate it from metals then electrolytic corrosion will cause failure extremely rapidly. Putting a glass fibre sleeve ( an insulator ) inside the tiller arm for the length of the yolk casting would help avoid these problems.
Carbon is great - but you tend to have to go all carbon for the electrolytic reason - which is why you tend to see all carbon Moths and Cherrubs. Weight saving is the prime - but not only - criteria.
Bob |
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Greg Curtin |
Posted: 20-Feb-09 13:30 |
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Bob
I have bought the tube a little oversized to allow space to insulate... I was going to use some rubber e.g. a cut from a bike innner tube or something bodged like that!!! Then Bolt through (with nylon washers) instead of rivets. What do you think?
Greg |
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Bob Ladell |
Posted: 23-Feb-09 22:34 |
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Sounds like a plan.
Bob |
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