O.S. 50SX-H Helicopter Engine Owner's Instruction Manual

About this manual

This manual provides instructions for the O.S. 50SX-H, an increased power version of the 50SX-H RING developed for F3C M class helicopter competition. Key features include a blue Alumite heatsink head for increased cooling capacity, a newly designed combustion chamber for stable output, and a 60LH carburetor with a 10mm bore for power increase. The engine is supplied with Glow Plug No.8 and an instruction manual.

What's inside

• SAFETY INSTRUCTIONS AND WARNINGS
• NOTES ON INSTALLING COOLING-FAN AND CLUTCH
• NOTES WHEN APPLYING AN ELECTRIC STARTER
• NOTE ON HEATING THE GLOW PLUG
• INTRODUCTION
• BEFORE STARTING
• ENGINE PARTS NAME
• ENGINE EXPLODED VIEW & PARTS LIST
• INSTALLATION OF THE ENGINE
• STARTING, RUNNING-IN

Specifications

Frequently asked questions

What is the O.S. 50SX-H engine designed for?

It is designed for F3C M class helicopter competition and should not be used for any other purpose.

What fuel is recommended for the O.S. 50SX-H?

A fuel containing 10% to 30% nitromethane is preferable for the best throttle response.

What is the minimum lubricant content required for the fuel?

The fuel must contain at least 18% lubricant by volume for consistent performance and long engine life.

What tools are necessary for operating the engine?

Necessary tools include Hex Wrenches (1.5mm to 3mm), Phillips Screwdrivers, Socket Wrenches (5mm to 7mm), and a Long Socket Wrench with Plug Grip.