2007-08-14 05:20:38 · 5 answers · asked by Aftab Banoori 2 in Science & Mathematics ➔ Astronomy & Space
excess helium gas being vented. Since helium is an inert gas, it is used to pressurize the fuel tanks.
2007-08-14 05:35:54 · answer #1 · answered by minorchord2000 6 · 0⤊ 0⤋
The vapors are from the on board microwave that is warming up the pre-flight ham dingers and Trader Joe's turkey pot pies for the crew. The hissing is caused by the out gassing of the keg of Watney's Reg Barrel located in the main fuel tank. ts
2007-08-14 05:56:23 · answer #2 · answered by Knick Knox 7 · 3⤊ 0⤋
Some of the sound is from escaping gas being vented but some of the hissing sounds you hear especially after landing is the sound that the A.P.U. makes.
2007-08-14 07:32:01 · answer #3 · answered by ericbryce2 7 · 0⤊ 0⤋
because gas is escaping they do that so that when they have to ignite it it will catch fire fast and send the shuttle off to space. The vapors could be from the heat cause it heats up and liquids could evaporate
hope it helps
2007-08-14 05:26:12 · answer #4 · answered by scarface 2 · 0⤊ 0⤋
Those sounds come from the liquid-fuel tank (..that's the big, orangeish tank..) venting excess fuel.
2007-08-14 05:27:41 · answer #5 · answered by Chug-a-Lug 7 · 0⤊ 0⤋