The landing gear blowdown system is used aboard commercial and military aircraft to unlock, lower and relock the main landing gear structure in the down position in the event of failure of the main hydraulic extension system.
Carleton's lightweight landing gear blowdown system (part number B40721-3) has been designed and qualified for use aboard the V-22/MV-22 Osprey.
Features:
The system consists of a lightweight composite gas storage vessel and valve manifold. The manifold includes a charging valve with standard schraeder style fill port, pressure gauge, solenoid actuation valve and over-pressure relief valve. The gas storage vessel is constructed using a seamless aluminum liner and fiberglass wrap with pressure embedded resign.
The solenoid valve is actuated with a 28 VDC command and initiates flow through the manifold outlet at 70 SCFM. A relief valve provides overpressure protection by limiting system pressure to 3600 psi. The system has been environmentally qualified to MIL-STD-810 and has successfully passed .50 caliber gunfire testing.
Specifications:
Medium
Dry Air, Nitrogen or both
Fill Pressure
2800 psig
(194 bar)
Proof Pressure
5,000 psig
(345 bar)
Burst Pressure
8,400 psig
(580 bar)
Flow Rate
0.10lb/min
(39 slpm)
Internal Leakage
<0.01 scc/min
External Leakage
<0.5 scc/min
Weight (Empty)
11.5 lbs
(4.3 kg)
Internal Volume
300 cubic inches
Electrical Characteristics
Voltage
Coil Current
Duty Cycle
18 to 30 VDC
0.50a max at 27.5 VDC
Continuous
Operating Environment:
Temperature
-65 to 160 deg F
(-54 to 71 deg C)
Humidity
0 to 95%
Shock
6 g operational
20 g crash
Vibration
3 Grms each axis
Non-Operating Environment:
Temperature
-65 to 160 deg F
(-54 to 71 deg C)
Salt Fog
MIL-STD-810, Method 509.2 Procedure I @ 200 ppm
Sand and Dust
MIL-STD-810, Method 510.2 Procedure I @ 1750 ft/min
