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FergWorld: Airplanes : Hughes 500 (369/OH-6A)

12/18/17    Home | Articles | Training | Instructor's Corner | Airplanes | Travelogues | PIREPS | For CFIs | ATPs | Pilot for Hire


Hughes 500

Resources for the Hughes 500 / OH-6A, including checklist and technical data, will be found here over time.


3 views of OH-6A
ManufacturerHughes (McDonnell Douglas)
RoleASW, scout, antitank, multimission
Blades Main rotor: 4
Tail rotor: 2
Rotor diameter 26 ft, 4 in (8 m)
Length Length (rotors turning): 30.8 ft.
Length (fuselage): 24.9 ft.
Height8.5 ft.
Width 6.2 ft.
Rotor Diameter Main Rotor Diameter: 26.2 ft.
Weight Maximum Gross: 2,400 lbs. Empty: 1,400 lbs.
EngineAllison 250-C18
Fuel Internal: 352 lbs.
Internal Aux Tank: 125 lbs.
Speed Maximum (level): 130 knots
Cruise: 119 knots (530)
Range Normal Load (est.): 260 nm
Ceiling Service: 15,000 ft.
Hover (out of ground effect): 6,000 ft.
Hover (in ground effect): 8,500 ft.


Allison 250-C18/T63-700 Specification

Power Output.....................................317 Bhp (C18) 420 Bhp (C20)
RPM...................................................52,000 (Compressor) 35,000 Power Turbine, O/P Shaft 6,000 rpm
Compressor.......................................6 Stage Axial with Bleed Valve + Centrifugal Impeller
Combustion Chamber.........................Single Can with Single Burner, Rear Mounted Side Entry
Compressor Turbine...........................2 Stage Axial
Power Turbine....................................2 Stage Axial with 5.8:1 reduction gear
Layout...............................................Twin Spool Turboshaft with combined accessory and output gearbox
Starting..............................................Starter Generator
Ignition..............................................High energy ignitor
Fuel System......................................Separate Fuel Pump, Gas generator Governor and Power Turbine Governor
Oil System.........................................Return System with Pressure and Scavenge pumps, External Oil Cooler and Tank.
Oil Spec.............................................MIL-L-7808, Aeroshell 390
Weight...............................................158 Lbs
Dimensions.........................................L 41in, W 21in, H 24in
Applications.......................................Helicopters: Jet Ranger, OH58, AS355, BO 105, A109 Also Turbo-prop A/C