These instructions cover the O.S. MAX-46SF-H and MAX-46SF-HS engines, which are described as developed for radio-controlled helicopters. The MAX-46SF-HS differs from the MAX-46SF-H by incorporating a rear starting device.
The document explains running-in and first flights, fuel and lubricant requirements, the recommended glowplug, the rear starter cone, and carburetor adjustment, including provisional settings for the needle-valve, mixture control screw and throttle stop screw.
| Recommended glowplug | No.8 |
|---|---|
| Fuel nitromethane content | 5% to 15% |
| Total oil content of fuel | not less than 18% |
| Carburetor type | Type 4D |
| Rear starter | Fitted to MAX-46SF-HS |
The MAX-46SF-HS incorporates a rear starting device, while the MAX-46SF-H does not.
The instructions recommend O.S. glowplug No.8.
The fuel should contain between 5% and 15% nitromethane.
The total oil content of the fuel should not be less than 18%.