This manual introduces the safety operation methods, precautions and maintenance methods of the seven-cylinder radial overhead-valve four-stroke engine.
This document is the owner's instruction manual for the O.S. FR7-420 (Sirius 7), a seven-cylinder radial overhead-valve four-stroke engine with a 70cc displacement designed specifically for model aircraft. It emphasizes safety warnings regarding propeller hazards, fuel toxicity, and carbon monoxide exhaust before detailing operational procedures.
| Cylinder Configuration | Seven-cylinder radial overhead-valve four-stroke engine |
|---|---|
| Displacement | 70cc |
| Carburetor Type | Type 80T |
The engine has a 70cc displacement.
No, the manual states not to attempt using it for any other purpose as it was designed specifically for model aircraft.
The standard accessory includes Glow Plug Type F.