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1G = Ibs. of Earth’s Gravity.
- Gray Outs & Black Outs
- Relives Physical Tension.
Purpose of Anti G- System
- To Eliminate or reduce the adverse effects of such maneuvers , fighter & attack type.
+ 5 Rubber Bladders
+ Compresses - lower parts of the body
+ tightening for adequate blood & oxygen - maintained to the brain.
Anti G- Suit
- a G-FORCE ACTIVATED
+ pnuematicallly operated.
+ controls Anti G- Suit inflation & deflation.
+ Air Source & Low Pressure controls suit inflation & deflation.
Anti G- Suit Valve
- a piece of rubber that creates a seal between the lower spring & lower chamber.
+ Creates a Seal
+ Encloses lower chamber
- valve opens to allow air flow from the lower chamber to the upper changer for suit inflation.
+ closed during static & and suit exhaust conditions.
+ normally closed.
- spring tends to push the demand valve & exhaust valve upward, closing the demand valve.
+ Compressed by G- Forces
+ demand valve will open
- valve opens to release air pressure from the suit during a suit exhaust condition & closes during a suit inflation condition.
+ vents suit air pressure.
+ Closed during 2 G’s or MORE
- provides a seal between the exhaust valve & weight during suit inflation.
- opened by the Upper Spring when G Force is decreased by 2 G’s.
- this valve limits maximum suit pressure (9 to 11 psig) & prevents over-inflation of the suit.
Suit Relief Valve
- is positioned around the exhaust valve.
+ Pushes up on the upper diaphragm & weight to open the exhaust valve.
- Gravity or positive G-forces move it downward to close the exhaust valve and open he demand valve during suit inflation condition.
+ Air from lower chamber to upper to inflate suit.
- weight moves down to close the exhaust valve & open the demand valve (simulating a positive G- force)
+ Leak checks the suit, the supply hose, & the connections before the FLT.
+ Check the suit relief valve for proper operation
+ Provide a massage during long flights.
Manual Inflation Button
- Less and 2 G’s and no air is being released from the suit.
+ Lower Spring pushes demand valve closed
+ exhaust valve is open
+ Partially cooled air is applied to the lower chamber from the ac sys.
+ No air pressure is being relieved from the suit.
- 2Gs or more, weight will push down on the upper diaphragm & seat it against the exhaust valve, closing the exhaust valve.
Air from the Lower Chamber into the Upper Chamber
Thru opened demand valve INTO suit.
+ protected by relief valve.
- G- force stabilizes: air pressure in the upper chamber equals the amount of force applied downward.
+ lower spring will begin to expand to close the demand valve.
+ exhaust valve also remains closed.
+ air pressure in the suit is maintained as long as G-force is constant.
- Excessive G forces end or drop 2 G’s
+ lower spring will push up (expand) & close demand valve.
+ stopping airflow into the suit.
+ The weight & upper diaphragm are pushed up by the upper spring opening exhaust valve.
+ providing an opening for airflow from the suit past the exhaust valve out to ambient.
Suit Exhaust Condition