Sky Power International is a leading manufacturer of high-performance 2-stroke combustion and Wankel rotary engines for UAS (Unmanned Aerial Systems) and hybrid applications.
Sky Power designs, develops and manufactures all engines in Germany. In addition to complete COTS propulsion units, we can also provide custom variants to our products as well as capacity extension of other combustion engines to suit precise customer requirements.
Gasoline and Heavy Fuel Engines (HFE)
Our gasoline engines and Heavy Fuel engines for UAV are available in one- or two-cylinder models and have been tested under the harshest of conditions to ensure the highest performance and reliability. We can also provide our patented engine mufflers to further reduce noise levels.
All engines with a capacity of 55 cc or higher can be delivered as a twin-spark version, with independently operating ignitions. This provides quieter running, increased safety and reliability and redundant operation. Fuel injection options are also available.
Single-Cylinder Multi-Fuel Engines
SP-28 Single-Cylinder UAV engine
The SP-28 is the smallest single-cylinder engine our portfolio, weighing just 2.95lbs.
The engine is equipped with a carburettor and an improved cylinder design for higher thermal stability, and will soon be upgraded with our new updated SP-IGU ignition design.
Learn more: SP-28 Single-Cylinder UAV engine
SP-55 Single-Cylinder UAV engine
The SP-55 single-cylinder drone engine can be equipped with either carburettor or fuel injection, as well as a twin-spark plug option. The compact design features a rear output shaft, allowing a generator to be mounted on the back of the engine. All engine variants are equipped with our HKZ215 ignition and ECU030 control unit.
The SP-55 FI TS ROS is the smallest one cylinder engine with rear output shaft in the Sky Power portfolio. SP-55 HF FI TS ROS heavy fuel variant available upon request.
Learn more: SP-55 Single-Cylinder UAV engine
Two-Cylinder Gasoline & Multi-Fuel Engines
SP-56 Two-Cylinder UAV Engine
The SP-56 is the smallest 2-cylinder engine in the Sky Power portfolio, with a generator that can be mounted on the rear output shaft.
The gasoline-powered engine is equipped with a carburettor and features an improved cylinder design for higher thermal stability.
Learn more: SP-56 Two-Cylinder UAV Engine
SP-110 Two-Cylinder drone engine
The SP-110 engine weighs 6.39 lbs and can be equipped with either carburettor or fuel injection, as well as a twin-spark plug option.
A generator can be mounted on the rear output shaft, and fuel injection electronics can be installed in an optional external enclosure which is mounted on top of the cylinders.
Heavy fuel variant upon request.
Learn more: SP-110 Two-Cylinder drone engine
SP-170 Two-Cylinder UAV engine
The SP-170 is a 170cc two-cylinder engine that can be equipped with either carburettor or fuel injection, as well as a twin-spark plug option.
A generator can be mounted on the rear output shaft, and fuel injection electronics can be installed in an optional external enclosure which is mounted on top of the cylinders.
Heavy fuel variant upon request.
Learn more: SP-170 Two-Cylinder UAV engine
SP-210 Two-Cylinder UAV engine
The SP-210 is a 170cc two-cylinder engine with a power output of up to 13.41 hp/ 10 kW at 6000 RPM. It can be equipped with either carburettor or fuel injection, as well as a twin-spark plug option.
A generator can be mounted on the rear output shaft, and fuel injection electronics can be installed in an optional external enclosure which is mounted on top of the cylinders.
The heavy fuel variant of the SP-210, featuring fuel injection and twin-spark operation, runs on a kerosene-oil mix of 50:1 using JET A, JET A1 or JP-8. The high-reliability system incorporates a newly-designed kerosene heating unit that jointly manages the startup process with the engine management unit.
Learn more: SP-210 Two-Cylinder UAV engine
SP-275 Two-Cylinder UAV engine
The SP-275 is our most powerful twin-cylinder UAS engine, providing up to 25.73 hp/18.92 kW of power. It can be equipped with either carburettor or fuel injection, as well as a twin-spark plug option. Heavy fuel variant upon request
The SP-275 TS CR variant has been specially designed for target drone applications, with a rear carburettor and a low-profile design optimized for high-speed training flights requiring minimal aerodynamic cross section.
Learn more: SP-275 Two-Cylinder UAV engine
All engine variants, except for the SP-275 TS CR, are equipped with our HKZ215 ignition and ECU030 control unit. Fuel injection electronics can be installed in an optional external enclosure which is mounted on top of the cylinders.
Wankel Rotary Engine
SP-180 SRE Wankel Rotary Engine for UAV
The SP-180 SRE is a UAV Wankel engine featuring a compact hybrid electrical design and an outstanding power-to-weight ratio. An optional hybrid-boost mode provides up to 15 kW of additional power, enabling a higher payload capacity and improved take-off performance for fixed-wing and VTOL UAV platforms.
The SP-180 SRE can run on gasoline or heavy fuel. The housing is water-cooled and the rotor is oil-cooled, allowing the system to maintain highly reliable operation under even the most challenging of flight conditions. Fuel injection is offered as standard, with an additional high-pressure fuel injection (HPI) option available upon request.
Learn more: SP-180 SRE Wankel Rotary Engine
Our drone engine construction kit is centred around one of our basic engine designs, which can be equipped with a carburettor and our new fuel injection technology. An optional exhaust, silencer, or ECU (engine control unit) can also be added.
Finally, the engine can be supplied with an e-drive or generator, which uses a converter to generate electrical energy for batteries and super-capacitors. This allows the engine to be used as a pure power generator for electrical motors, or as a combined system in which electrical and combustion energy can be used in combination.
Learn more: UAS Engine Construction Kit
With over 35 years of experience in the development of engines and their ancillary systems our expert Engineering Services offer customers a comprehensive service catalogue pertaining to the development of individual propulsion concepts, optimization of existing propulsion structures as well as to the integration of propulsion solutions into UAS cassis.
Engine break-in testing
Sky Power can carry out break-in testing for your UAV engines on our in-house engine test stands according to your specifications. This process provides you with a ready-to-fly engine that can be used immediately in your UAS or provided to customers for instant deployment, saving preparation time and increasing convenience.
Endurance and specification testing
Sky Power conducts engine tests according to your specifications, simulating each individual usage parameter and extensively documenting each test. Our precise instruments allow us to accurately measure fuel consumption, engine parameters, and exhaust-gas temperatures.
We can also undertake endurance tests, during which your engines are subjected to between 50 and 200 hours of uninterrupted loading on our in-house engine test stands, as well as climate tests. After each test, the engines are disassembled and examined, and full test results are made available to you.
Our complete test capabilities include:
- General performance measurement of combustion engines
- Thrust and power measurement
- Exhaust analysis
- Engine indexing
- Endurance testing
- Blower, water, and oil pump analysis
- Cylinder-head measurement
- Load-change calculation
- EMC measurements
- Climate and temperature tests.
Overhaul and maintenance
Individual maintenance steps for each engine that can be completed by the operator are described in detail in the operating manual, along with maintenance intervals. We can provide a spare parts pack for each engine that will allow you to conduct these tasks yourself at any time.
Larger maintenance tasks can be completed by Sky Power at our facility in Germany – please contact our Service Department for more information.
After reaching the maximum time between overhaul (TBO), which can vary depending upon operating environment and maintenance regularity, Sky Power can overhaul the engine at our facility.
Repair
Following a crash or other serious incident, engines must be repaired by Sky Power’s Service Team – please contact us for an initial determination of the feasibility of repair before sending in the engine. Detailed engine tests are carried out as part of the repair work, in order to document the engine’s operational readiness.
Customer-specific service on request
We can develop individual service plans and amendments for you, based on your requirements. Please contact our Service Department for more information.
Learn more: Engineering Services
UAS Project Development
Whether a single engine or complex propulsion development, Sky Power can work with you through all stages of the product development. Our project consulting service will support you with technical knowledge and experience to determine the project and also the level of support required, which may include program development as well as system integration services.
Sky Power can undertake the complete project management lifecycle, from initial concept through to serial production. The earlier the cooperation starts means the more comprehensive service received from Sky Power. Technical parameters, schedules and budgets must be clearly defined in advance to allow for Sky Power’s agile management of the complete UAS project development.
Learn more: UAS Project Development
