Not So Airtight Fuselage? — Tech Ops Forum

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Not So Airtight Fuselage?

BayouFlyer From United States of America, joined Oct 2004, 4 posts, RR: 0
Posted (8 years 7 months 1 hour ago) and read 2454 times:

I am curious about some details in this picture taken by Antti Salo.....

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Photo © Antti Salo

I get the impression from the evenly spaced "dashes" in the snow on the fuselage that warm air from the cabin is escaping through the rivet lines on the rib stations. Of course, if this were the case, the aircraft could never hold pressure at altitude....right? Can anyone shed some light on what would cause this pattern in the snowfall?

5 replies: All unread, jump to last

SPREE34 From United States of America, joined Jun 2004, 2114 posts, RR: 10
Reply 1, posted (8 years 7 months ago) and read 2390 times:

Heat from inside is transmitting quicker through the frame members to the outside, than throug hthe space between frame members which is insulated. You can see this happen in cars as well, sometimes on buildings.

I don't understand everything I don't know about this.

Jfkaua From United States of America, joined Aug 2004, 1000 posts, RR: 3
Reply 2, posted (8 years 7 months ago) and read 2377 times:

yea it seems that the metal transmits the heat from point a to point b faster then hollow air.

SATL382G From , joined Dec 1969, posts, RR:
Reply 3, posted (8 years 6 months 4 weeks 1 day 23 hours ago) and read 2348 times:

Metal is a conductor of heat whereas air tends to be an insulator. Your clothes and the insulation in your house trap air which is why they keep you warm.

BayouFlyer From United States of America, joined Oct 2004, 4 posts, RR: 0
Reply 4, posted (8 years 6 months 4 weeks 1 day 21 hours ago) and read 2298 times:

Thanks folks. Now I can sleep tonight! Smile/happy/getting dizzy

Aviopic From Netherlands, joined Mar 2004, 2681 posts, RR: 46
Reply 5, posted (8 years 6 months 4 weeks 1 day 21 hours ago) and read 2306 times:

All true, on the other hand not a single airframe is 100% air tight and they all lose pressure at the moment you stop doing something about it.
Even a bullet hole does not lead to loss of pressure as many people seem to think, the system can easily cope with that as it does not add much to the amount of air you are loosing anyway.
By the time the hole becomes as big as a window you are in serious trouble though.

The truth lives in one’s mind, it doesn’t really exist

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