UAV28-EFI Turnkey Fuel Injected Engine

Developed to enable reliable long endurance flights of small fixed wing UAVs with up to 55 lbs. takeoff weight

Key Features

• Electronic fuel injection with superior atomization
• Does not contain ITAR or EAR components
• Optimum performance under broad environmental conditions
• Integrated 100W onboard generator system
• Proprietary silent muffler as standard equipment
• Operator software for plug & play integration
• Non-detectable at 700 m distance
• 30 % fuel consumption improvement over carbureted engines
• Smooth and stable operation
• -30 C cold weather starting
• Optional automatic cooling system
• Comes fully assembled, calibrated and tested
• Onboard telemetry logging on 4 Gb flash card

The engine is particularly suitable for the long endurance unmanned aircraft due to the excellent fuel consumption. Low accoustic signature enables covert surveillance and reconnaissance missions.

UAV28-EFI system is a fully integrated and cost-efficient engine system targeted to replace carbureted engines and significantly enhance unmanned aircraft reliability, endurance, and performance as well as to expand operational conditions.

Fuel Injection Advantage

UAV28-EFI system was developed to address deficiencies of small carbureted engines that are well known for low inherent reliability and large fuel consumption. Engine reliability is a limiting factor in small unmanned aircraft vehicle reliability. Small carbureted engines are very difficult to tune and maintain- engine failure is a number one cause of unmanned aircraft loss.

UAV28-EFI utilizes automotive fuel injection processor with a miniature fuel injector capable of very fine atomization of fuel. Engine is controlled by purpose-developed ECU that takes into account Manifold Air Pressure, Manifold Air Temperature, RPM, Cylinder Head Temperature, Barometric pressure and Throttle Position to automatically calculate optimum fuel amount and spark timing. As result, UAV28-EFI does not need any tuning, operates efficiently and reliably. The time between maintenance is increased due to the clean, efficient fuel burn.

Simple Plug & Play Integration with autopilots

  • Throttle control through PWM, Serial RS232 or CAN
  • Standalone EFI monitor software works through serial pass-through with any datalink or autopilot
  • Precise real-time fuel consumption and fuel amount data
  • Seamless compatibility with Piccolo
  •  Protocol available for engine integrators
EFI Monitoring software is included with the UAV28-EFI engine system. Software can be used as a part of the aircraft ground control software by simply connecting ECU with the operator computer, through a serial pass-through. EFI monitor is compatible with any autopilot system and data link system that has a serial pass-through.
EFI Monitor displays visual bar indicators of all critical engine parameters. A color indication gives an operator a clear visual overview of the system status and allows troubleshooting potential issues during the flight, before the parameter would exceed safe value.
EFI Monitor software adds vital engine information to the standard ground control software without the need of custom software development.
EFI monitor provides very precise fuel flow as well as the amount of fuel available on board in real time, therefore eliminating the need of a separate fuel level sensor. An operator can use this data to optimize the endurance of the system during the flight.

Integrated Turnkey Engine System
UAV28-EFI system is a turnkey solution that comes fully integrated with mature onboard generator system, high performance proprietary muffler system as well as fully automatic Temperature Control Duct (TCD). System includes generator power unit (GPU), Electronic Control Unit (ECU) as well as Fuel Pump Unit (FPU). The temperature control duct has a servo flap that is controlled by ECU in order to keep the engine at optimum operational temperature. Fuel filter unit and air filter unit are supplied with the system as standard option.

Product Specification

Engine Type Fuel Injected two-stroke, single cylinder, air cooled
Power 2.5 kW (3.4 hp)
Fuel Consumption 400 g/kWh in cruise
Fuel type Automotive 95+ octane (RON)
Displacement 28 cc (1.74 cu in)
Speed range 1600-8500 rpm
Engine Life >500 hours 1)
Oil / Gasoline Ratio 1:50 / 2% mix
Recommended 2-bladed Propellers 16x10, 18x8, 18x10, 19x11, 20x8
Recommended 3-bladed Propellers 16x8, 16x10
Engine weight (including sensors, generator, cooling system, servos, air filter, muffler assembly) 2200 grams
Muffler Combined reactive-dissipative, proprietary design
Sound level, measured from 30 m distance 59 dB
Detectability range @ 5000 RPM <700m (<2300 ft)
Fuel Pump Lifetime Over 2000 hours
Fuel priming Self-priming
Weight 70 grams (0.15 lbs)
Throttle control CAN (Piccolo autopilot compatible), RS232, PWM, Analog (0-5V)
Autopilot compatibility Compatible with all autopilot systems
Pump control Integrated pump controller
Cylinder head temperature control Integrated controller with PWM output
Weight 170 grams (0.37 lbs)
Input Voltage 10-24V
Power (ignition module, ECU, pump, servo , injectors) <15W @ maximum RPM
Environmental protection Fully sealed, IP64
Size 86x107x22.3 mm
1) depends on operational conditions. The maintenance program needs to be performed at prescribed intervals.

UAV28-EFI Dimensions

ECU Dimensions

Product Downloads

UAV28-EFI Datasheet V1.1

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Product Video

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