We supply reliable DLE (DL Engine) gasoline and hybrid aircraft propulsion powerplants for commercial unmanned aerial vehicles (UAVs), tactical reconnaissance drones, target tugs, and light aircraft. The lineup spans single-cylinder, horizontally opposed boxer, and multi-cylinder engines from 2.5 hp to 45 hp, as well as integrated 28V/48V starter-generator configurations and hybrid HEV systems delivering up to 6 hours of continuous multicopter endurance. We deliver direct factory shipments from manufacturing facilities in China with dedicated engineering support and integration verification.
DLE Engine & Powerplant Catalog
A comprehensive spectrum of professional DLE propulsion solutions for unmanned aviation: from ultralight single-cylinder engines to heavy multi-cylinder and hybrid range extenders.
DLE single-cylinder two-stroke aviation gasoline engines covering DLE20, DLE20RA, DLE30, DLE35RA, DLE55, DLE55RA, DLE61, DLE65, and DLE85 provide robust propulsion for lightweight tactical UAVs, aerial targets, training platforms, and scale aircraft.
Delivering power outputs from 2.5 hp to 8.5 hp with engine weights between 820 g and 2100 g, they combine high power-to-weight ratios with proven field reliability. Rear-exhaust (RA) models allow ultra-compact aerodynamic cowlings without compromising exhaust flow.
Each powerplant integrates a genuine Walbro diaphragm carburetor with built-in pulse fuel pump and a microprocessor CDI electronic ignition system operating across 4.8V to 8.4V with automated timing advance.
Precision needle bearings installed in both connecting rod journals significantly reduce frictional drag, ensuring sustained thermal stability throughout continuous flight sorties.
Supplied in complete factory configuration with muffler, spark plug, CDI module, and CNC mounting standoffs.
DLE40–DLE170 Twin-Cylinder Boxer Aviation Engines
DLE twin-cylinder horizontally opposed (boxer) aircraft engines include DLE40, DLE60, DLE111, DLE120, DLE130, and DLE170. The boxer architecture provides inherent dynamic balance by cancelling reciprocating piston inertia forces, drastically minimizing airframe vibration.
This structural smoothness is vital for stabilizing electro-optical payloads, gimbal sensors, and sensitive onboard avionics. Engine ratings span 4.8 hp to 17.5 hp, generating static propeller thrust from 9.5 kg to over 35 kg.
Heavy-duty nitrided crankshafts supported by triple precision ball bearings ensure exceptional durability during prolonged surveillance operations. Precision dynamic balancing across the crank assembly prevents destructive airframe resonance harmonics throughout throttle transitions.
Boxer geometry ensures smooth vibration profiles and extended airframe structural fatigue life.
DLE222 & DLE120T4 Four-Cylinder Aircraft Engines
DLE four-cylinder aircraft powerplants represent the pinnacle of two-stroke engineering, led by the flagship DLE222 (222cc) and the smooth DLE120T4. The DLE222 produces 21.5 hp at 7500 RPM, delivering over 50 kg of static thrust at an all-up dry weight of only 4950 g.
Built with an aerospace-grade CNC engine block and a monolithic crankshaft riding on five heavy-duty main bearings, it withstands rigorous aerodynamic loading.
Dual synchronized Walbro carburetors and independent reed valve blocks guarantee balanced fuel distribution across all four combustion chambers for demanding mission profiles.
With four power strokes per crankshaft revolution, torque output is remarkably uniform, providing instant throttle spool-up under demanding flight maneuvers.
Dual synchronized CDI modules deliver dependable ignition timing across all four combustion chambers.
Industrial UAV Engines with Starter-Generator DLE130G / DLE170G
The DLE industrial starter-generator series (DLE130G, DLE170G, and DLE170MG) is purpose-engineered for tactical surveillance UAVs and extended-endurance aerial platforms.
By integrating an ultra-compact brushless BLDC starter-generator onto the forward crankshaft, the system delivers both remote autonomous engine restart capability and continuous onboard electrical generation.
Regulated power outputs of 28V or 48V with capacities from 500W to 1200W ensure uninterrupted supply to flight controllers, synthetic aperture radars, and satcom transceivers without draining primary batteries.
An internal sprag overrunning clutch mechanism automatically disengages starter gears once combustion commences, preserving electro-mechanical longevity.
Shipped with dedicated generator control unit (GCU) and shielded heavy-gauge harness.
Engineered for cargo logistics drones, heavy target complexes, and long-range strategic UAVs, the heavy-duty DLE industrial lineup includes DLE200, DLE400, and DLE430 powerplants. Developing between 20 hp and 45 hp, these engines readily power aircraft with maximum takeoff weights reaching 150 kg.
Key structural innovations include high-tensile forged pistons, heavily finned heat-dissipation housings, and optional closed-loop electronic fuel injection (EFI).
The EFI system dynamically adapts air-fuel ratios to density altitudes up to 5,000 m and extreme ambient operating temperatures from -30°C to +50°C.
Standardized analog and CAN telemetry interfaces stream real-time cylinder head temperatures, fuel delivery pressures, and engine RPM back to ground control.
Time between overhauls (TBO) reaches up to 300 operating hours under recommended maintenance protocols.
DLE35HD, DLE70HD & DLE128HD Hybrid HEV Power Systems
DLE Hybrid Electric Vehicle (HEV) series power systems (DLE35HD, DLE70HD, and DLE128HD) combine an internal combustion engine with a high-efficiency brushless generator.
Configured as a series hybrid range-extender, the engine drives the generator to supply continuous 48V–56V direct current to electric propulsion motors on multicopters and VTOL aircraft while continuously replenishing the backup LiPo battery.
Delivering electrical outputs from 2.5 kW to 9.5 kW, this system extends flight endurance from typical battery limits of 30 minutes up to 4 to 6 continuous hours with payload.
Fast-acting digital current-limiting and short-circuit protection safeguards the complete airborne power grid from catastrophic transients.
Engineered for agricultural spraying UAVs, long-duration corridor inspection, and aerial LiDAR.
Microprocessor DLE CDI Electronic Ignition Systems & Sensors
DLE Capacitive Discharge Ignition (CDI) systems provide high-energy ignition voltage and automated dynamic timing advance across the full operational spectrum from 1200 to 9500 RPM.
Engineered in single-, twin-, and quad-cylinder variants, these units feature a wide supply voltage tolerance of 4.8V to 8.4V, enabling direct connection to 2S LiPo or LiFe receiver packs without voltage-dropping regulators.
Fully shielded spark plug caps and tin-plated braided spark leads prevent electromagnetic radiation from interfering with sensitive onboard avionics, magnetometer compasses, and GPS antennas.
Built-in reverse polarity protection safeguards internal surface-mount circuitry from inadvertent battery terminal swapping during field setup.
Fully compatible with industry-standard NGK CM-6 and proprietary DLE spark plugs.
DLE fuel induction systems integrate genuine Walbro diaphragm carburetors with optimized composite reed valve assemblies. Driven by crank pulses, the internal diaphragm fuel pump delivers consistent gasoline delivery regardless of flight attitude, inverted flight, or negative G-loads.
Independent low-speed (L) and high-speed (H) needle valves permit fine fuel-air mixture adjustment across ambient temperatures and altitudes. V-shaped composite reed valve cages eliminate mixture spit-back, improving volumetric efficiency, rapid throttle response, and fuel economy.
Lightweight aluminum canister expansion mufflers suppress engine acoustic sound pressure signatures by 8 to 12 dB without sacrificing propulsive horsepower.
Supplied with composite thermal isolator blocks and tuned aluminum canister mufflers.
DLE engines are engineered for 92 or 95 octane aviation or premium unleaded gasoline blended with premium synthetic two-stroke oil at 30:1 during break-in and 40:1 for normal mission cycles.
Deep cylinder head and engine block finning maintains balanced thermal dissipation in tractor and pusher cowling ducts.
Genuine Walbro diaphragm carburetors ensure uninterrupted fuel flow under sustained high-G maneuvers, while digital CDI ignition units with Hall-effect timing sensors deliver effortless hand or electric starting with stable low-idle behavior across changing climates.
All rotating assemblies and crankshafts are machined to micron-level tolerances on state-of-the-art multi-axis CNC centers, ensuring precision interchangeable components and rapid field serviceability.
Each engine shipment includes standard factory documentation, user manual, and verified propeller performance recommendations.
Starter-Generator & Hybrid Integration
For long-range tactical UAVs requiring extensive onboard payload power, DLE offers factory-integrated brushless BLDC starter-generator systems (DLE130G and DLE170G series).
Matched Generator Control Units (GCUs) output up to 1.2 kW of clean 28V or 48V DC power while enabling in-flight engine restart.
The DLE hybrid HEV series (DLE35HD, DLE70HD, DLE128HD) acts as an onboard airborne power station for multicopter and VTOL platforms, multiplying airborne operational endurance by 500% to 800% over conventional lithium batteries.
The generator management electronics interface with autopilot systems over telemetry buses, broadcasting live readings of bus voltage, load current, winding temperature, and instantaneous power draw across mission operational envelopes.
Undisclosed Technical Information
Public manufacturer brochures do not disclose detailed high-altitude brake-specific fuel consumption (BSFC) matrices, propeller performance polars under varied air densities, or military-grade vibration test certificates.
Certified MTBF test logs, custom wiring schematics for Pixhawk and industrial autopilot architectures, and volume fleet delivery schedules are provided upon formal technical request.
