[hpv-boats] Sleeved Shaft

[v garza]

Thanks, Rick you have given me a lot to think about.  Those are quite 
impressive measurements.
How thin will the 1/4" mesh go when stretched tight on a rod, as I am 
shooting for about 1/8" on the rod part. That way I can add another layer 
for strength if needed. Can I get small amounts of the equivalent epoxy in 
USA, is my next question to research....

Vic


----- Original Message ----- 
From: "Rick Willoughby" <rickwill at bigpond.net.au>
To: "HPV Boat" <hpv-boats at bikelist.org>
Sent: Monday, August 16, 2010 3:30 AM
Subject: [hpv-boats] Sleeved Shaft


> Vic
> The sleeved shaft is 24% stiffer while being 6% heavier.
>
> I may have got a bit better if I had been able to get the fibres at  45 
> degrees rather than something less.
>
> The resin ratio is about 1.5x so more than you would use with  multiple 
> layers.  I was aiming for the resin to provide extra  protection for the 
> CF.
>
> Remember the stiffness is a function of the 4th power of diameter so  the 
> improvement is not linear.  Another layer would probably get to  60% 
> better and three layers would be equivalent to the steel alone.
>
> Aluminium is 1/3rd the stiffness of steel so one layer of the CF will 
> almost double what you get from aluminium rod.
>
> Rick --
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