Item No. 16685
Discription

Discounted Price
O.S. FR7-420 SIRIUS 7 CYLINDER RADIAL

Displacement: 0.6071cu in x 7 (9.95cc x 7)
Bore: 0.944" (24.0mm)
Stroke: 0.866" (22.0mm)
Practical RPM: 1,500 - 7,000
Weight: 111.7 oz (3.167g)

FEATURES:
V-shaped individual valve covers for vintage scale appearance
Impeller system distributes air-fuel mixture equally to each cylinder
ensuring high performance and smooth idle

REQUIRES:
Fuel: Aircraft blend 5-25% nitro content and at least 16% lubricant content.
Propeller: 22x10-12, 23x8-12, 24x8-12, 26x8
Suppliers Comments
The O.S. Engines® Sirius 4-stroke engine is ready and waiting to give vintage 7-cylinder design to any scale aeroplane modeller's dream. The “Golden Era” looks of the FR7-420 Sirius are matched by its superb power output and rich, realistic sound. The V-shaped valve layout makes this engine compatible with several aeroplane styles. The main internal parts like the crankshaft, cam holder and reduction gear are all plated to resist corrosion while the air-fuel mix is distributed equally to each cylinder to ensure a stable, long-lasting idle.

$3505.50