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Ephil - 40cc Twin Gasoline Engine - X-40cc-T
Bring dependable twin-cylinder power to your RC aircraft with the EPHIL X-40cc-T — a compact, precision-built 40 cc gasoline engine that delivers 4.6 HP of smooth and consistent performance.
Designed for pilots who want reliability without unnecessary complexity, this engine features electronic ignition, dual CM6 Iridium spark plugs, and excellent power-to-weight balance for stable operation and reduced vibration.
Perfect for large sport or scale aircraft, the X-40cc-T offers easy starting, crisp throttle response, and the unmistakable sound of a true twin-gas engine.
Usage
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Recommended aircraft: Large fixed-wing RC models with a wingspan around 2 m (78–85 in) or in the 8–12 kg weight range.
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Ideal for: Sport, scale, and aerobatic aircraft requiring smooth power and compact twin-cylinder balance.
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Propeller sizes: 20×8 | 20×10 | 19×8 | 19×10 — select according to altitude and aircraft setup.
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Fuel mix: 30 : 1 (Gasoline : 2-stroke motor oil).
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Ignition voltage: 6 – 14 V.
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Ensure proper airflow for cooling and secure engine mounting to handle torque and vibration.
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Break-in period: Run at rich mixture with moderate throttle for the first few tanks to ensure smooth operation and long engine life.
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No electric starter on this model — traditional manual start for lightweight simplicity.
Technical Specifications
Model: X-40cc-T
Displacement: 40 cc (2.44 cu in)
Performance: 4.6 HP
Speed Range: 1800 – 7300 RPM (Tested with 20×8 propeller)
Bore: 32 mm (1.26 in)
Stroke: 27 mm (1.06 in)
Compression Ratio: 9 : 1
Static Thrust:
10.5 kg @ 100 m altitude (23.2 lb @ 328 ft)
8.8 kg @ 1800 m altitude (19.4 lb @ 5900 ft)
Lubrication Ratio: 30 : 1 (Fuel : 2-stroke motor oil)
Ignition Voltage: 6 – 14 V
Spark Plug Type: CM6 Iridium spark plug
Recommended Propellers: 20×8 | 20×10 | 19×8 | 19×10
Component Weights:
Main Engine: 1150 g
Muffler Set (L & R + Screws): 136 g
Aluminum Standoff Set: 84 g
Spark Plugs (×2 CM6): 13.5 g each
CDI (Ignition): 173 g
Total Weight: 1570 g (3.46 lb)







