Horizontally Opposed 4-Cylinder · Two-Stroke
xinhua.shi1987@gmail FQ-550 Aviation Engine
The FQ-550 is an aviation-grade, air-cooled two-stroke engine with a horizontally opposed four-cylinder layout. Automatic-advance CDI ignition and premix lubrication deliver stable output at high altitude and under demanding conditions. Every engine is dynamometer-tested and flight-verified before delivery, backed by worldwide technical support.
- Forced air cooling with ceramic nickel-silicon coated aluminum cylinders for sustained high-power operation
- CDI automatic-advance ignition with synchronized opposed-cylinder firing from 500 rpm
- Forged seven-piece crankshaft for high strength, low vibration and long service life
- Wide speed range (1300–7500 rpm) balancing low-speed torque and high-rpm power
Specifications
| Model | FQ-550CC |
|---|---|
| Layout | Horizontally opposed, 4-cylinder |
| Stroke | Two-stroke |
| Displacement | 550 cc |
| Bore × Stroke | 66 mm × 40 mm |
| Power | 49.62 hp / 37 kW |
| Speed Range | 1300–7500 rpm |
| Static Thrust (100 m) | 70 kg |
| Static Thrust (1800 m) | 61.8 kg |
| Max Takeoff Weight | 220 kg |
| Recommended Propeller | 32×20; 30×23; 30×25 |
| Weight | 18.3 kg |
| Crankshaft | Forged, seven-piece assembly |
| Fuel/Oil Ratio | 50:1 |
| Ignition | CDI automatic-advance |
| Carburetor / EFI | 2 diaphragm all-position carburetors, no choke / injection port |
| Generator | 800 W / 2000 W |
| Fuel Consumption (Carb) | 14 L/h |
| Fuel Consumption (EFI) | 10 L/h |
| Dimensions (L×W×H) | 430 × 340 × 400 mm |