On Sun, Jul 3, 2011 at 5:26 PM, Alexey Toptygin <alexeyt at freeshell.org> wrote:
On Sat, 2 Jul 2011, Nick Allen wrote:
Below is a link to the photos of the Titan IV
Missile Test equipment,
... notice the "Air Pressure Equalizer" knob...
Not in space, but on a plane. The air pressure in an aircraft cabin at
altitude is significantly less than 1atm
Civilian cabins are routinely pressurized around 7000-8000 ft, though
it varies gradually throughout the flight.
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.
The nickname for them is "Bunny Boots" - they look like white Micky
Mouse boots and the valve is a source of noob hazing (you tell someone
new that they have to get the glycol changed out in their new boots
and send them to the motor pool/vehicle maintenance facility, where
everyone knows the joke...hilarity ensues).
If you forget to open the valve prior to take-off, they get darn
uncomfortable at altitude, and there's so much pressure that the valve
sticks (I tried it once intentionally, to see how much they swelled
up, and I didn't last until cruising altitude).
-ethan