The OS FS-70 is a highly regarded line of single-cylinder, four-stroke glow-plug model aircraft engines manufactured by OS. Engines. Widely praised in the radio-control (RC) hobbyist community for its exceptional reliability, distinct scale sound, and smooth power delivery, it is primarily used to power “.40 to .60 size” sport aircraft, scale warbirds, and trainers.

Core Specifications

The standard FS-70 line carries the following baseline parameters:

Displacement: 11.50 cc (0.702 cu. in.)
Bore: 25.8 mm (1.016 in.)
Stroke: 22.0 mm (0.866 in.)
Practical RPM Range: 2,000 to 12,000 RPM
Power Output: ~1.1 BHP at 11,000 RPM
Weight: 570 g to 580 g (approx. 20 oz.)

Please review the photos carefully, as you will receive the exact items shown. Only the items pictured are included; anything not shown is not part of this listing.

Condition: Unboxed, with signs of age and surface wear. Please see the photos.

• Listing ID: 291309
• County: Hampshire

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