Armstrong-Siddeley Cheetah X

The Armstrong-Siddeley Cheetah is a British air-cooled aircraft radial engine. Radial engine of a biplane. ...

Development

The basic design of the Cheetah remained unchanged since its introduction in 1919. It was the first engine of its type to be certified for 1,200 hours of operational time between overhauls. Over 35,000 engines were built. This is a list of aviation-related events from 1919: Events Avianca begins services. ...

Cheetah was used to power many British trainer aircraft during World War II including the Avro Anson and Airspeed Oxford. Combatants Major Allied powers: United Kingdom Soviet Union United States Republic of China and others Major Axis powers: Nazi Germany Italy Japan and others Commanders Winston Churchill Joseph Stalin Franklin Roosevelt Harry Truman Chiang Kai-Shek Adolf Hitler Benito Mussolini Hideki Tojo Casualties Military dead: 17,000,000 Civilian dead... The Avro Anson was a twin-engine, multi-role aircraft that served with the Royal Air Force, Fleet Air Arm and numerous other air forces during World War II and afterwards. ... The Airspeed AS10 Oxford was a twin-engine aircraft used for training British Commonwealth aircrews in navigation, radio-operating, bombing and gunnery during World War II. // History The Oxford was based on Airspeeds commercial 8-seater Envoy III, seven of which had been modified for the South African Air...

Variants

• Cheetah IX - 355 hp (265 kW) at 2,425 rpm
• Cheetah X - 375 hp (280 kW) at 2,300 rpm
• Cheetah XV - supercharger, 420 hp (315 kW) at 2,550 rpm
• Cheetah 25 - Cheetah XV uprated to 475 hp (355 kW) at 2,700 rpm

A supercharger (also known as a blower) is an air compressor used to compress air into the cylinders of an internal combustion engine. ...

Specifications (Cheetah XV)

General characteristics

• Type: Seven-cylinder supercharged air-cooled radial engine
• Bore: 5.25 in (133 mm)
• Stroke: 5.5 in (140 mm)
• Displacement: 834 in³ (13.65 L)
• Length: 49.6 in (1,261 mm)
• Diameter: 47.7 in (1,210 mm)
• Dry weight: 805 lb (365 kg)

Components

• Valvetrain: Two pushrod-actuated valves per cylinder with sodium-cooled exhaust valve
• Cooling system: Air-cooled.

Performance

• Power output:
  
  • 420 hp (315 kW) at 2,550 rpm for takeoff at sea level
  • 400 hp (300 kW) at 2,425 rpm for cruise at 4,000 ft (1,220 m)
• Specific power: 0.50 hp/in³ (23.1 kW/L)
• Compression ratio: 6.35:1
• Fuel consumption: 1.11 US gal/h (4.27 L/h) at economical cruise
• Power-to-weight ratio: 0.52 lb/hp (0.86 kW/kg)

Radial engine of a biplane. ... A pushrod engine or overhead valve (OHV) engine is a type of piston engine that places the camshaft below the pistons (usually beside and slightly above the crankshaft in a straight engine or directly above the crankshaft in the V of a V engine) and uses pushrods or rods to... General Name, Symbol, Number sodium, Na, 11 Chemical series alkali metals Group, Period, Block 1, 3, s Appearance silvery white Atomic mass 22. ... In engineering, specific power (sometimes also power per unit mass or power density) refers to the amount of power delivered by an energy source, divided by some measure of the sources size or mass. ... The compression ratio is a single number that can be used to predict the performance of any engine (such as an internal-combustion engine or a Stirling Engine). ... Power-to-weight ratio is a measure commonly used when comparing various vehicles (or engines), including automobiles, motorcycles and aircraft. ...

References

• Bridgman, L, (ed.) (1998) Jane's fighting aircraft of World War II. Crescent. ISBN 0-517-67964-7

See also