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Old 22 May 2010, 07:28   #1
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Air pressure on a 6mtr rib

Hi
Does anybody know how much air I should have in the tubes in a 6mtr Humber? and in this warm weather should you let air out so they dont pop?
Thanks
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Old 22 May 2010, 07:31   #2
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Roughly 2.5psi, you can either use or gauge or whack it with your fist. When your fist bounces off they're about right.

No doubt someone will come along trying to sell gauges shortly and call me rough for using my fist.....
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Old 22 May 2010, 07:34   #3
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When I first got mine I was worried about too soft / too hard but yes the fist/thumb/knee test is as good as any

You can buy gauges but they are quite pricey. I think Ribshop do them. Everything I ever own in the future will have pressure relief valves - anything with dark tubes or tube-top patches gets really hot in direct sunlight and very very hard.
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Old 24 May 2010, 10:14   #4
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Quote:
how much air
when it feels right it is right!
Quote:
should you let air out
yes! a certain ILB (no names-no pack drill) was popped when they left it out in the sun to pose and rattle the tin and even with pressure relief valves which we have always specced on ours as they are black it makes sense not to rely on them entirely, but to anticipate them warming if you are leaving it where it will end up in the sunshine.
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Old 24 May 2010, 12:12   #5
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the MOD use 1.5psi working pressure and 2.5psi max pressure
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Old 26 May 2010, 19:32   #6
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Quote:
Originally Posted by wavelength View Post
when it feels right it is right!

yes! a certain ILB (no names-no pack drill) was popped when they left it out in the sun to pose and rattle the tin
They have a few ILBs that station though!
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Old 27 May 2010, 09:09   #7
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They have a few ILBs that station though
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Old 27 May 2010, 09:15   #8
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Quote:
Originally Posted by paul tilley View Post
the MOD use 1.5psi working pressure and 2.5psi max pressure
What Paul said, had a look on the Atlantic and its the same, minimum 0.5psi.
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