Fiala Prop Wooden 20×10 2-blade natural propeller

Fiala Prop Wooden 20×10 2-blade natural propeller

The Fiala Prop Wooden 20×10 2-blade natural propeller is an elite, competition-grade wooden propeller engineered by Fiala Propellers specifically for large-scale, gasoline-powered RC model aircraft. Widely recognized as some of the finest wood airfoils available on the global market, Fiala props balance exceptional aerodynamic efficiency with an affordable price point. This premium 20-inch blade is precisely carved to shape, structurally optimized to handle the high vibration and harsh torque curves of 30cc to 40cc two-stroke or four-stroke petrol engines, and finished in a classic natural wood aesthetic that adds a scale look to any giant-scale warbird, aerobatic plane, or vintage model.

Precision Airfoil Carving and Factory Balancing

Running large-scale single-cylinder gasoline model engines can subject an airframe to punishing structural vibrations if the propeller is even slightly out of balance. To eliminate this issue, Fiala propellers are carved using state-of-the-art multi-axis CNC machinery from premium, hand-selected sustainably sourced European hardwood. This precise machining guarantees flawless symmetry across both blades. Every single propeller undergoes rigorous factory static and dynamic balancing before leaving the production line. This careful quality control protects your engine’s front crankshaft bearings from premature wear, smooths out mid-range throttle transitions, and reduces resonance across airframe joints.

Key Features

• Premium European hardwood construction delivers an exceptional strength-to-weight ratio.

• Optimized 20-inch diameter with a 10-inch pitch profile designed specifically for gasoline engines.

• Factory pre-balanced to eliminate harmful high-amplitude engine vibrations.

• Coated in a fuel-proof, high-gloss transparent varnish to resist oil and gas staining.

• Low rotational mass enables crisp throttle tracking and rapid RPM acceleration curves.

• Features a standard 10mm pilot shaft hole, easily reamed for custom multi-bolt hubs.

• High-efficiency 2-blade design maximizes static thrust and top-end airspeed performance.

• Classically styled natural wood grain finish complements scale and aerobatic RC aircraft.

Aerodynamic Efficiency and Protective Finishing

Large-scale RC flight demands a rigid propeller that maintains its true pitch shape under heavy G-loads and aggressive snapping maneuvers. Unlike composite plastic or nylon blades that can flex and lose aerodynamic efficiency under load, the dense wooden structure of the Fiala 20×10 prop remains completely rigid. This structural stability provides predictable vertical climbing power and excellent braking performance during downward flight lines. To safeguard the wood from environmental damage, each prop is sealed in a specialized, fuel-resistant clear lacquer. This transparent varnish highlights the natural wood grain while shielding the core fibers from raw gasoline, exhaust residue, rain, and high field humidity.

Technical Integration and Safety

Investing in authentic Fiala hardware ensures type-certification readiness and exceptional mechanical safety buffers for your large-scale giant aircraft. The prop features a standard 10 mm center shaft pilot hole, which can be custom-drilled using a precision propeller guide to match standard multi-bolt gas engine hubs like DLE, DA, or OS Engines. Due to its lightweight wooden composition, it possesses significantly lower rotational inertia than equivalent carbon fiber or plastic blades, allowing your engine’s carburetor to track throttle changes rapidly without bogging down, giving you total control during critical low-altitude 3D hovers and landing flares.