The DLE 40 Twin is a smooth-running, high-performance 40cc opposed-twin petrol engine engineered for pilots who want exceptional reliability, low vibration and outstanding value. Delivering 4.8 horsepower with a compact, lightweight twin-cylinder layout, the DLE 40 Twin offers silky-smooth operation that protects both the airframe and electronics while still providing serious power for aerobatic, scale and sport aircraft.

DLE has equipped this engine with a wide range of premium features as standard, including electronic ignition, two mufflers, paired spark plugs, composite backplate mount, pumper carburettor, and CNC-machined components for maximum durability and precision. The engine benefits from sealed crankshaft bearings, an optimised carburettor, and a phenolic heat-insulated intake to ensure consistent performance in all conditions.

If you're looking for a compact opposed-twin that delivers premium performance without the premium price tag, the DLE 40 Twin is one of the best engines in its class.

Key Features

• Powerful and smooth 40cc opposed-twin petrol engine
• Lightweight piston design for fast throttle response & low vibration
• CNC-machined parts for strength and long service life
• Electronic ignition included as standard
• Updated twin mufflers for reduced noise and improved performance
• Optimised pumper carburettor for consistent fuel delivery
• Sealed crankshaft bearings for enhanced durability
• Phenolic carb isolator reduces heat transfer for stable tuning
• Composite backplate mount for strength and reduced weight
• Opposed cylinder layout dramatically reduces airframe vibration

Perfect For

• 30–50cc scale aircraft
• Twin-engine effect without twin-engine complexity
• High-detail warbirds, Cubs, biplanes & golden-age models
• 3D/sport aircraft requiring smooth, consistent torque
• Pilots seeking lower vibration than single-cylinder engines

Product Summary

A smooth, efficient and powerful 40cc opposed-twin petrol engine offering exceptional value and reduced vibration. Includes electronic ignition, twin mufflers and installation hardware, making it a complete and ready-to-fit solution for 30–50cc class aircraft.

Specifications

Engine Specs

• Displacement: 40.0 cc (2.45 cu in)
• Bore (x2): 32 mm (1.26 in)
• Stroke (x2): 25 mm (0.98 in)
• RPM Range: 1500–8500
• Output: 4.8 hp @ 8500 rpm
• Total Weight: 1.5 kg (3.3 lb)

Technical Data

• Ignition Battery: 4.8–8.4 V NiCd/NiMH, 6.6 V LiFe, or 2S LiPo
• Gas/Oil Mix: 30:1
• Replacement Spark Plug: DLEG4026
• Static Thrust:
• 20.9 lb (9.5 kg) @ 328 ft
• 18.7 lb (8.5 kg) @ 1,800 ft

Weight Breakdown

• Engine: 1170 g (2.58 lb)
• Mufflers (x2): 102 g (3.6 oz)
• Ignition Module: 149 g (5.3 oz)
• Standoffs: 19 g (0.7 oz)
• Misc Hardware: 56 g (2 oz)

Suggested Propellers

• 19 × 8
• 19 × 10
• 20 × 8
• 20 × 10

Included

• Electronic ignition module
• 2 × mufflers
• 2 × spark plugs
• Standoffs
• Spiral wire wrap
• Connector safety clips
• Instruction manual

Requires

• Ignition battery
• Suitable propeller

Why Buy From ProBuild Aircraft Ltd

• ✅ Official UK DLE Stockist – 100% Genuine Engines
• ✅ Trusted by Top International RC Pilots Worldwide
• ✅ Fast UK Shipping & Secure, Protective Packaging
• ✅ Expert Petrol Engine Support & Setup Advice
• ✅ Trusted by Pilots Since 1993