Pobjoy Niagara
The Pobjoy Niagara was a British air-cooled 7-cylinder radial engine . The engine was manufactured by the Pobjoy Airmotors company from 1934 and was characterized by its unusual design for a radial engine. Due to the reduction gear built into the motor housing, the motor shaft emerged eccentrically from the motor. The Niagara was an engine often used in light and test aircraft. The entire range of engines produced by Pobjoy Motors consisted of 7-cylinder radial engines with very compact dimensions and very high speeds. Pobjoy Airmotors enjoyed a high reputation for their motors due to their small size, low operating costs, low noise level and their original technical solutions.
Technical data (Pobjoy Niagara IV)
- Engine type: 7-cylinder radial engine, air-cooled
- Bore: 80.96 mm (3.1875 in)
- Piston stroke: 87.31 mm (3.4375 in)
- Displacement: 3.15 l (192.0 cuin)
- Length: 558.8 mm (22 in)
- Diameter: 698.5 mm (27.5 in)
- Weight: 74.4 kg (164 lb)
- Valve arrangement: an inlet u. one exhaust valve per cylinder
- Mixture formation: a Claudel carburetor
- Fuel: gasoline, 70 octane
- Cooling system: air cooling
- Maximum output: 79 kW (108 PS) at a speed of 3750 / min (Niagara V: 96 kW (130 PS) at 4000 / min)
- Power standard: 74 kW (100 PS) at 3250 rpm
- Compression ratio : 6.5: 1
- Power-to-weight ratio : 1 kg / kW (1.64 lb / PS) (norm.)
commitment
- Airspeed Fleet Shadower
- General Aircraft Monospar ST-25
- Saro Shrimp
- Short Scion Senior
- Short Scion
- Short Stirling (reduced test sample)
- Spartan clipper
- Pobjoy pirate
swell
- Gunston Bill: World Encyclopedia of Aero Engines. P. 126, Wellingborough: Patrick Stephens 1986
- http://www.oldengine.org/members/diesel/Duxford/ukaero3.htm
Web links
Commons : Pobjoy Niagara - collection of pictures, videos and audio files
