3 Jul
2011
3 Jul
'11
3:26 p.m.
On Sat, 2 Jul 2011, Nick Allen wrote:
Below is a link to the photos of the Titan IV Missile
Test equipment, notice
it comes with paper tape ribbon (I assume some code is on it). Also notice
the "Air Pressure Equalizer" knob, this lets air in/our of the case (it is
sealed with a gasket). Do you know why it would have an "Air Pressure
Equalizer" knob? I assume this means it is used in different air pressures,
would this therefore be used in space as opposed to on the ground in your
opinion?
Not in space, but on a plane. The air pressure in an aircraft cabin at
altitude is significantly less than 1atm, so most good air-tight equipment
cases will have one of these knobs. The military even has air-insulated
boots for use in the arctic that have a valve on them so they don't crush
your feet when you're flying.
Alexey