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Author Topic: Build of E5 number 6 (i think)  (Read 64148 times)

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Offline john_hamilton

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Re: Build of E5 number 6 (i think)
« Reply #90 on: March 11, 2011, 11:33:38 AM »
sorted hopefully :)
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Offline john_hamilton

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Re: Build of E5 number 6 (i think)
« Reply #91 on: April 18, 2011, 09:43:10 PM »
might change the name to "nomad" for personal reasons!
just managed to destroy my first attempt at a centerboard with far too low density foam!!!
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The pessimist complains about the wind; the optimist hopes it will change; the realist adjusts the sail

cherub 2645 - cheese before bedtime

Offline phil_kirk

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Re: Build of E5 number 6 (i think)
« Reply #92 on: April 19, 2011, 12:35:47 PM »
I would reccomend that you use 200kg/m^3 foam for the centreboard.

It is easier to router and a little bit more stable when you get to the very thin bits.
No stringers required.  1 sheet should be plenty although you may need to be inventive with the sizeable off cuts to get the full length required.
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Offline john_hamilton

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Re: Build of E5 number 6 (i think)
« Reply #93 on: March 31, 2012, 07:05:26 PM »
is using 1mm dyneema for the new trap wires brave or stupid? its got a avg breaking load of 154kg, but i would assume thats from a static load, and also that splices weaken it?
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The pessimist complains about the wind; the optimist hopes it will change; the realist adjusts the sail

cherub 2645 - cheese before bedtime

Offline simon_jones

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Re: Build of E5 number 6 (i think)
« Reply #94 on: March 31, 2012, 07:32:12 PM »
Bearing in mind that you often run through a cherub and grab the wire as you jump out before hooking on, I hope you plan on wearing gloves. At least all your fingers will be findable after.
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Offline john_hamilton

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Re: Build of E5 number 6 (i think)
« Reply #95 on: April 01, 2012, 12:43:40 AM »
davro said the dynamic loads may be a bit too much, so moving up to 2mm with a big trap handle
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The pessimist complains about the wind; the optimist hopes it will change; the realist adjusts the sail

cherub 2645 - cheese before bedtime

Offline Torchy

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Re: Build of E5 number 6 (i think)
« Reply #96 on: April 01, 2012, 03:27:05 PM »
1mm dyneema - I agree with Simon that it is more a sliced finger issue. I think the elastic rope on the hook will take care of dynamic loading...probably
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Offline phil_kirk

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Re: Build of E5 number 6 (i think)
« Reply #97 on: April 05, 2012, 09:30:06 PM »
We had 1.5mm for a while  (breaking load of 300kg).  and have now changed to 2.5mm.  The big enemy was chafe around the metal trapeeze adjuster. We had a similar problem near the top but solved that by using earth sheathing on the eye of the splice which attached the trap line to the mast.  basically dynema against dynema is ok for chafe but against anything harder can be a problem. especially if you didn't really have much margin for chafe in the first place.
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