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Alternatively, a constant-speed propeller is one where the pilot sets the desired engine speed , and the blade pitch is controlled automatically without the pilot's intervention so that the rotational speed remains constant. The device which controls the propeller pitch and thus speed is called a propeller governor or constant speed unit.
Feathering of these propellers is performed by the propeller control lever. [14] The constant-speed propeller is distinguished from the reciprocating engine constant-speed propeller by the control system. The turboprop system consists of 3 propeller governors, a governor, and overspeed governor, and a fuel-topping governor. [14]
Propellers: 5-bladed Hartzell constant speed propellers, 9 ft 7 in (2.92 m) diameter; Performance. Maximum speed: 285 kn (328 mph, 528 km/h)
Propellers: 3 or 4-bladed MT-Propeller, 1.95 m (6 ft 5 in) diameter constant-speed fully-feathering propeller Performance Maximum speed: 359 km/h (223 mph, 194 kn) at 10,000 ft (3,000 m)
[2] O-235-E1 Power 115 hp (86 kW) at 2800 rpm, dry weight 250 lb (113 kg) Similar to O-235-C1 except crankcase and crankshaft supply pressurized oil to a constant speed propeller. Accessory case changed to accommodate a standard propeller governor drive. [2] O-235-E1B
A controllable-pitch propeller (which includes airplanes with constant-speed propellers and airplanes with FADEC which controls both the engine and propeller; turbojet and turbofan airplanes, except very rare mixed-propulsion airplanes, are not considered complex). Movable or adjustable flaps.
Data from Jane's All the World's Aircraft 1976–77 General characteristics Crew: 2 Capacity: 4–6 passengers Length: 34 ft 8 in (10.57 m) Wingspan: 42 ft 8 + 1 ⁄ 4 in (13.011 m) (over tip tanks) Height: 12 ft 9 in (3.89 m) Wing area: 229 sq ft (21.3 m 2) Airfoil: NACA 63 2 -415 at root, 63A212 at tip Empty weight: 4,870 lb (2,209 kg) Max takeoff weight: 9,000 lb (4,082 kg) Fuel capacity ...
The constant-speed propeller was popularly known as the "gearshift of the air." [12] [13] [14] Caldwell and Ernest G. McCauley hold three joint patents for propeller innovations. [6] In 1990, the Hydromatic Propeller, on display at the New England Air Museum of Windsor Locks, was pronounced as an International Historic Mechanical Engineering ...