飛機培訓(xùn)課件英文版：Copy of Pneumatic Air

1、King Air C90,Pneumatic Air Created March 2007,Pneumatic Air,The pneumatic system on the C90 utilizes engine bleed air regulated to 18 psi and cooled. Pneumatic Air operates the following systems: The wing deicing system Door seals Pneumatic air also passed through an ejector and vents overboard unde

2、rneath the aircraft.,Pneumatic Air,The ejector is a Venturi that creates vacuum for air driven instrument gyros, the cabin pressure controller and the deflate function of the wing and stabilizer boots. One engine can supply sufficient bleed air to operate all of the system at power setting of 70% N1

3、 and above. A one way check valve in a common manifold stops bleed air from flowing into the failed engine.,Pneumatic and Vacuum Gauges,Gauges are located on the lower right side of the copilots sub panel. The vacuum gauge indicates vacuum available in inches of mercury. For flights between 30,000 f

4、t and 15,000 ft use the narrow green arc (3.0 4.3” Hg). For flights between 15,000 ft and S.L. use the wide green arc (4.3 5.9 “ Hg).,Pneumatic and Vacuum Gauges,The pneumatic pressure gauge indicates air pressure available to the deice distributor valve in pounds per square inch. Normal operating r

5、ange (green arc) is 12 to 20 psi. A red line is place at the top of the green arc,Cabin Door and Emergency Exit,Pneumatic air pressure is used to inflate the cabin door and emergency exit seal. 18 psi air passes through a 4 psi regulator to a normally open valve. On the ground the valve is held closed electrically, when the aircraft is airborne, the left squat switch de-energizes the valve