- Source: Pobjoy P
The Pobjoy P was a British seven-cylinder, air-cooled, aircraft engine designed by Douglas Rudolf Pobjoy and built by Pobjoy Airmotors. It became the progenitor of the Pobjoy R/Niagara/Cataract family of small radial engines. A notable feature of the Pobjoy P was the propeller reduction gear which allowed the small engine to operate at more desirable higher speeds.
Applications
Comper C.L.A.7 Swift
Parnall Imp
Specifications (Pobjoy P)
Data from Jane's all the World's Aircraft 1928
= General characteristics
=Type: 7-cylinder air-cooled, radial, left-hand tractor
Bore: 2.83 in (72 mm)
Stroke: 3.43 in (87 mm)
Displacement: 151.05 cu in (2.48 L)
Diameter: 25 in (640 mm)
Dry weight: 115 lb (52.16 kg)
Designer: Douglas Rudolf Pobjoy
= Components
=Valvetrain: overhead valves operated by rockers, push-rods and tappets driven by a cam-plate at the rear of the engine
Fuel system: One Zenith carburetor
Fuel type: 80% Petrol, 20% Benzol
Oil system: Dry sump, pressure system at 45 psi (310 kPa)
Cooling system: Air-cooled
Reduction gear: Double-helical spur gear 0.524:1
= Performance
=Power output: 60 hp (45 kW) at 3,000 rpm rated output; 67.5 hp (50.3 kW) at 3,300 rpm maximum
Specific power: 0.397 hp/cu in (18.1 kW/L)
Specific fuel consumption: 0.35 kg/kWh (0.57 lb/(hp⋅h))
Oil consumption: 0.018 L/kWh (0.023 imp pt/(hp⋅h))
Power-to-weight ratio: 0.858 kW/kg (0.522 hp/lb)
References
Kata Kunci Pencarian:
- Walraven 2
- Giesecke+Devrient
- Pobjoy P
- Pobjoy Niagara
- Pobjoy Airmotors
- Pobjoy R
- Comper Swift
- Nicholas-Beazley Pobjoy Special
- Lympne light aircraft trials
- Parnall Imp
- Emley
- List of aircraft engines
