O.S. Engine (GF30 II (70T2) W/F-6040 SILENCER)

O.S. Engine GF30 II (70T2) with F-6040 Silencer

The O.S. GF30 II is the ideal choice for large-scale RC and UAV fixed-wing aircraft requiring reliable performance and the unmistakable sound of a 4-stroke engine. Perfectly suited for models designed for 120/150 size glow engines, this 30cc gasoline powerhouse delivers smooth, linear throttle response—making it equally capable in both scale and aerobatic flight applications.

Featuring the newly designed 70T carburetor for easy adjustments and excellent operational stability, the GF30 II ensures consistent performance. The IG-07 ignition system comes with an innovative spark plug cap that allows flexible positioning to suit various engine layouts. Paired with the F-6040 silencer, this setup not only reduces noise but also produces the classic deep exhaust tone of a 4-stroke engine.

A long-awaited radial mount is also available as an optional accessory for more versatile installation options.

Technical Specifications:

• Displacement: 33 cm³ (29.94 ccm)
• Power Output: 3.9 kW (5.5 HP) at 7000 RPM
• RPM Range: 1700 – 9000 RPM
• Recommended Propellers: 18x8" to 20x10"
• Carburetor Type: WT1024
• Fuel Mixture: Gasoline/Oil 1:30
• Engine Weight: 980 g (without silencer)
• Silencer Weight: 140 g
• Total Height (with Spark Plug): 161 mm
• Engine Width: 80 mm
• Length to Hub: 155 mm
• Bore x Stroke: 36 mm x 32.4 mm
• Mounting Hole Spacing (Transverse): 70 mm
  
• Mounting Hole Spacing (Lengthwise): 54 mm
• Shaft Thread: 5/16"-24 UNF-2A
• Muffler Included: Yes

This engine combines performance, efficiency, and that authentic 4-stroke sound enthusiasts love. Perfect for those looking to elevate their aircraft’s realism and reliability.