The MD550 engine is a model aircraft/drone engine。
Four cylinder, horizontally opposed, air cooled, two cycle engine, with solid state magneto or battery ignition, mixture lubrication. Suitable for pusher and tractor installations.
MD550 Piston Engine Indicator Parameters
| Performance | 37 kW (50 HP) at 7500 rpm |
| Bore | 66 mm / 2.60 inch |
| Stroke | 40 mm / 1.57 inch |
| Displacement | 548 cm3/ 33.44 cub. inches |
| Crankcase | Aluminum casting |
| Pistons | Cam ground, casted aluminum alloy |
| Cylinders | Casted aluminum alloy, with Ceramic coating |
| Ignition system | Solid state magneto ignition |
| Firing Order | Both cylinders simultaneously |
| Carburetors | 4 diaphragm all position carburetors, without choke |
| Starter | 12 V, 0.3 kW |
| Generator | 28 V, 1200 W |
| Dry weight approx | 16 kg with magneto ignition |
| Fuel | AVGAS 100LL or 90 RON mixed |
| Shielded ignition system, Long and short crankshafts, Exhaust stacks | |
MD550 Piston Engine Application Scenario
MD550 Piston Engine Dimensions
MD550 Piston Engine PowerTorqueSFC Curves
MD550 Piston Engine NEWS
The Shahed 136 drone, which weighs more than 200 kg, uses the MD550 piston engine. The output power of this four cylinder horizontally opposed air-cooled two-stroke engine has reached 50 horsepower, and its deadweight is only 16 kg. The larger and heavier witness – 136 naturally needs a stronger engine. At the same time, the piston engine can also ensure lower fuel consumption, so as to achieve a huge range of 2500 kilometers.
According to professional observation, Shahed 136’s MD550 piston engine is a counterfeit
