Thermal engine O.S. Engines GF 30 II Gasoline + F-6040

O.S. GF-30 II: a 4-stroke gasoline engine designed for demanding aeromodellers

The O.S. GF-30 II Gasoline engine illustrates all the expertise of O.S. Engines in the development of 4-stroke engines for radio-controlled aircraft.

This second generation benefits from numerous technical advancements aimed at improving reliability, operational consistency, and user comfort, while retaining the qualities that have built the reputation of the GF range.

With a displacement of 29.94 cm³, this engine offers an excellent balance between power, torque, and flexibility.

Its progressive behavior allows for realistic flights on scale models as well as dynamic maneuvers on sport or aerobatic aircraft.

Its robust design and high-precision machining make it a particularly favored powerplant among modelers seeking enduring performance.

A modern engine designed for reliability

The GF-30 II stands out not only for its performance. O.S. Engines has also worked on its overall architecture to enhance reliability and reduce maintenance operations.

A robust 4-stroke design

Like all engines from the Japanese brand, the GF-30 II benefits from extremely precise machining and materials selected for their mechanical strength. The crankshaft, distribution system, valves, and all internal components are designed to withstand intensive use while maintaining excellent operational consistency.

This quality of manufacturing helps limit parts wear and enables the engine to maintain its performance over hours of flight.

The PCV system: a cleaner engine

The GF-30 II also incorporates a PCV (Positive Crankcase Ventilation) system.

This system recovers gases from the engine crankcase to reintroduce them into the intake. This technology allows for:

• limiting oil splashes on the fuselage;
• maintaining a cleaner engine compartment;
• improving user comfort after each flight.

This solution, rarely found in model engines, demonstrates the level of refinement provided by O.S. Engines.

An engine perfectly suited for various RC aircraft

Thanks to its excellent power-to-weight ratio, the GF-30 II equips both leisure aircraft and more demanding models.

Great versatility

This engine is perfectly suitable for:

• sport aircraft;
• aerobatic aircraft;
• warbirds;
• semi-scale models;
• towing aircraft;
• large-scale models.

Its significant torque available at low speeds allows for confident takeoffs, excellent traction, and particularly enjoyable piloting.

Recommended propellers

O.S. recommends using propellers ranging from:

• 17 × 8
• 17 × 10
• 18 × 8
• 18 × 10

The choice of propeller can naturally be adapted to the type of aircraft and the desired piloting style.

Appreciable autonomy thanks to gasoline fuel

Operating on gasoline has several advantages for modelers who perform long flight sessions.

The consumption of GF-30 II remains particularly controlled, allowing for a significant increase in autonomy without the need for a large capacity tank.

Depending on the conditions of use, a tank of approximately 230 ml generally allows between 10 and 15 minutes of flight, while maintaining a perfectly regular power supply.

This low consumption also helps reduce operating costs in the long term.

A complete equipment ready to be installed

The O.S. GF-30 II Gasoline comes with all the main elements necessary for its installation:

Box contents

• O.S. GF-30 II engine;
• complete F-6040 muffler;
• exhaust manifold;
• ignition module IG-07;
• ignition sensor;
• spark plug;
• mounting accessories;
• manufacturer documentation.

The set allows for a quick installation on the majority of compatible aircraft.

Why choose an O.S. GF-30 II engine?

For several decades, O.S. Engines has been one of the most reputable manufacturers in the modeling world. Each engine benefits from a particularly high level of finish, excellent availability of spare parts, and a reputation for reliability recognized by modelers worldwide.

The GF-30 II fully embodies this philosophy. Its modern mechanics, significant torque, low consumption, and particularly smooth operation make it an ideal engine for those looking for a performant, durable, and pleasant to use 4-stroke gasoline engine, suitable for both leisure flying and the most demanding models.

Characteristics

• Displacement: 29.94cc
• Bore: 38mm
• Stroke: 26.4mm
• Power: 2.76hp @ 9000rpm
• Speed range: 2500-18000rpm
• Weight: 1010g (engine), 113g (muffler), 95g (ignition)