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Old 14 March 2008, 19:24   #21
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Originally Posted by jwalker View Post
I agree with codders, I can't speak for aluminium alloys but stainless can certainly be a problem. Given that many aluminium alloys age harden and work harden then.....
He's right-certain grades of ally do work harden.
Aluminium alloys are a big can of worms though. It'd take an essay and data sheets to show what can happen to them after welding.
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Old 14 March 2008, 21:47   #22
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Quote:
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GRP tanks have certain advantages - stainless and ali tanks can fracture quite easily with the constant pounding.
Oh don't tell me that Cod... like I need another thing to worry about...
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Old 14 March 2008, 22:51   #23
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Oh don't tell me that Cod... like I need another thing to worry about...
It all depends how they are made - how they are mounted - and what sort of alloys they are made from.

Also the bigger the RIB the less of a hammering they get. My hull gives such a soft ride I could probably have glass tanks.................
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Old 09 April 2008, 06:53   #24
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Most race boats in the classes I have raced in have Ally tanks - stainless ones have a habit of splitting at unfortunate times - ask Richard Strawford about having an above deck tank made in Egypt to replace his built in for life Stainless tank in a race Pascoe Rib. We have done diesel tanks built in and part of the hull as per CE regs, but Scott Bader will not commit themselves as to the suitability of their resins with the new additives in petrol (insert Codders comments here), and if they won't commit then they won't get past the CE or worse still the coroner when it blows up.
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When a boat looks that good who needs tubes!!!
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Old 09 April 2008, 13:33   #25
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The resin for fuel tanks is Neo Pentyl Glycol.
more information below.

Neo Pentyl Glycol

Nick.
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Old 09 April 2008, 14:30   #26
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Scorpion

My Scorpion has a GRP tank.

Comments about ethanol are interesting to note - Tesco 99 octane has bio ethanol in it. Probably best stick to the regular petrol!
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Old 09 April 2008, 14:44   #27
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Scott Bader NPG resin data sheet. Resin recommended for use up to 25% alcohol.

Maybe there's something else about petrol which worries them.
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Old 09 April 2008, 15:15   #28
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Quote:
Originally Posted by Searider View Post
My Scorpion has a GRP tank.

Comments about ethanol are interesting to note - Tesco 99 octane has bio ethanol in it. Probably best stick to the regular petrol!
In the US the % ethanol must be declared by a sticker on the pump. Have not heard of anywhere selling more than 10%. Generaly the higher the octane the lower the ethanol. It still makes me very nervous of damage caused to engines, which is the big risk not leaking tanks.
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Old 09 April 2008, 15:31   #29
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Quote:
Originally Posted by Cookee View Post
built in for life Stainless tank in a race Pascoe Rib.
Pascoe's tanks were ally!
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Old 10 April 2008, 09:40   #30
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Boat owners in US sue 'Big Oil

Topical news item on MBM

http://www.ybw.com/auto/newsdesk/200...17mbmnews.html

Quote:
Originally Posted by Dirk Diggler View Post
Pascoe's tanks were ally!
and it leaked oh dear, Mark should have listened and used titanium then , we used to have a real expert on here called JF who had the ideal solution and wouldn't have added much to the overall cost of a Pascoe Rib.

http://rib.net/forum/showthread.php?...tanium&page=14



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