Sirius7 FR7-420 7-Cylinder Engine
The brightest star in 4-stroke appearance and performance!
The "Golden Era" looks of the FR7-420 Sirius are matched by its superb power output and rich, realistic sound! Its vintage, 7-cylinder design is an airplane pilot's dream, while individual V-shaped valve covers add to the engine's superior scale appearance.
- The vintage 7-cylinder design is a scale airplane modeler's dream.
- Individual V-shaped valve covers add to the scale appearance, and make this engine compatible with several airplane styles.
- Main internal parts such as the crankshaft, cam holder and reduction gear are all plated to resist corrosion.
- Air-fuel mixture is distributed equally to each cylinder to ensure high performance and superb idle.
Specifications
Displacement: 0.60 cu in x 7 (9.95 cc x 7)
Bore: 0.94 in (24 mm)
Stroke: 0.87 in (22 mm)
Practical RPM: 1,500-7,000
Weight: 111.7 oz (3.167 kg)
Requirements: 5-10% blend nitro airplane fuel with 8-10% lubricant content
22x10-12, 23x8-12, 24x8-12 or 26x8 propeller
Features
Click Images for larger view.
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The V-shaped valve layout matches various scale model airplanes.
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Main internal parts such as the crankshaft, cam holder and reduction gear are all plated for corrosion resistance. Select, high-quality materials and proper thermal treatment ensure durability.
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The inner propeller distributes balanced air-fuel mixture to each cylinder, resulting in stable idling.
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