HS-990 2-stroke UAV Engine

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Description
2-stroke UAV Engine

2-stroke UAV Engine
Introduce
HS-990 UAV Engine is a small aviation four cylinder horizontal opposed air-cooled two-stroke gasoline engine. The air intake system adopts two diaphragm carburetors and the air intake is controlled by the reed valve. The fuel system adopts two diaphragm fuel pumps. The ignition system adopts CDI contactless magneto ignition, and the engine is started by external motor.

Technical indicators
Engine type: two stroke, four cylinder horizontal opposed
Total displacement: 989cmm ³
Compression ratio: theoretical compression ratio: 10.2, actual compression ratio: 7.8
Output power: 55.5kw75hp) / 6000rpm
Net mass: 27kg
Fuel consumption rate: 0.51kg/kw. H at max.power, 0.38kg/kw. H at cruise
Cooling mode: air cooling
Ignition mode: contactless magneto
Spark plug: NGK bpr8hs
Electrode gap: 0.7mm
Carburetor: diaphragm carburetor
Exhaust system: straight through short exhaust pipe
Fuel pump; Diaphragm fuel pump (pulse pressure driven)
Fuel: 93ron
Lubricating oil: Mobil 2-T
Mixing ratio: 36 ~ 40:1
Propeller rotation direction: counterclockwise (viewed from the propeller end)
Start mode: start through external motor
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