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Location:
Brisbane
Registered:
October 2002
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Re: Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 05:24
 
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| draven wrote on Sun, 03 October 2004 13:31 |
(Pi.R1^2) - (Pi.R2^2)
if I understand the question correctly.... that's SA for 1 face. if you want total 3d SA, that's 2x the above, + Pi.2.R1.T + Pi.2.R2.T where T is the thickness
edit: Just finished my coffee and realised what an O-ring looks like, thus my formula being useless (but I like the way it looks)
for an o-ring, it'll be (Pi.R1.2).(Pi.R2^2), where R1 is radius from centre of o-ring to middle of the rubber, and R2 is radius of the actual rubber piece.
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thats what i'd have said 
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