NASA's Super Guppy

[SarDragon]

Regarding pressurizing the entire plane, it's not like it's being pumped up to a couple of hundred PSI. The absolute maximum pressure differential is less than 15 PSI. Sure, there's a huge volume, and a large leak would be interesting to watch. I'd think that a pump big enough to supply that much air would be the limiting factor.

[PHall]

Regarding pressurizing the entire plane, it's not like it's being pumped up to a couple of hundred PSI. The absolute maximum pressure differential is less than 15 PSI. Sure, there's a huge volume, and a large leak would be interesting to watch. I'd think that a pump big enough to supply that much air would be the limiting factor.

Max pressure is usually in the neighborhood of 8 psid with the safety valves opening at 9 psid or so.    (psid = pounds per square inch differental)

On the C-141 and the C-5 it was 8.3 psid with the safeties opening at 8.7 psid.