Sky Power International stands out as a premier producer of high-efficiency 2-stroke combustion and Wankel rotary engines tailored for Unmanned Aerial Systems (UAS) and hybrid applications.
All engine designs, developments, and manufacturing processes are conducted in Germany. Beyond offering complete Commercial Off-The-Shelf (COTS) propulsion systems, we also specialize in creating customized engine variants and enhancing the capacity of existing combustion engines to meet specific client needs.
gasoline and Heavy Fuel Engines (HFE)
Our gasoline and Heavy fuel engines for UAVs come in one- or two-cylinder configurations, rigorously tested to withstand extreme conditions, ensuring optimal performance and reliability. We also offer patented engine mufflers to minimize noise emissions.
Engines with a displacement of 55 cc or more can be supplied in a twin-spark configuration, featuring independent ignition systems. This enhances quiet operation, boosts safety, and ensures redundancy. Fuel injection options are also available.
Single-Cylinder Multi-Fuel Engines
SP-28 Single-Cylinder UAV Engine
The SP-28 is our lightest single-cylinder engine,weighing only 2.95 lbs.
This engine features a carburettor and an enhanced cylinder design for improved thermal stability, with plans for an upgrade to our latest SP-IGU ignition system.Discover more: SP-28 Single-Cylinder UAV Engine
SP-55 Single-Cylinder UAV Engine
The SP-55 single-cylinder engine can be configured with either a carburettor or fuel injection, along with a twin-spark plug option. Its compact design includes a rear output shaft, facilitating generator attachment. All variants are equipped with our HKZ215 ignition and ECU030 control unit.
The SP-55 FI TS ROS is the smallest single-cylinder engine with a rear output shaft in our lineup. A heavy fuel variant of the SP-55 is available upon request.
Discover 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 two-cylinder engine in our lineup, designed to accommodate a generator on its rear output shaft.
This gasoline engine features a carburettor and an enhanced cylinder design for superior thermal stability.Learn more: SP-56 Two-Cylinder UAV Engine
SP-110 Two-Cylinder drone Engine
The SP-110 weighs 6.39 lbs and can be configured with either a carburettor or fuel injection, along with a twin-spark plug option.
A generator can be attached to the rear output shaft, and fuel injection electronics can be housed in an optional external enclosure mounted atop the cylinders.
Heavy fuel variants are available upon request.
Discover 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 configured with either a carburettor or fuel injection, along with a twin-spark plug option.
A generator can be mounted on the rear output shaft, and fuel injection electronics can be housed in an optional external enclosure mounted atop the cylinders.
Heavy fuel variants are available upon request.
discover more: SP-170 Two-cylinder UAV Engine
SP-210 Two-Cylinder UAV Engine
The SP-210 is a 170cc two-cylinder engine capable of delivering up to 13.41 hp/10 kW at 6000 RPM.It can be configured with either a carburettor or fuel injection,along with a twin-spark plug option.
A generator can be mounted on the rear output shaft, and fuel injection electronics can be housed in an optional external enclosure mounted atop the cylinders.
The heavy fuel variant of the SP-210, featuring fuel injection and twin-spark operation, utilizes a kerosene-oil mix of 50:1 with JET A, JET A1, or JP-8.This high-reliability system includes a newly designed kerosene heating unit that works in tandem with the engine management unit during startup.
Discover more: SP-210 Two-Cylinder UAV Engine
SP-275 Two-Cylinder UAV Engine
The SP-275 is our most powerful twin-cylinder UAS engine, delivering up to 25.73 hp/18.92 kW. It can be configured with either a carburettor or fuel injection, along with a twin-spark plug option. heavy fuel variants are available upon request.
The SP-275 TS CR variant is specifically designed for target drone applications, featuring a rear carburettor and a low-profile design optimized for high-speed training flights with minimal aerodynamic drag.
Discover 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 housed in an optional external enclosure mounted atop the cylinders.
Wankel Rotary engine
SP-180 SRE Wankel Rotary Engine for UAV
The SP-180 SRE is a Wankel engine designed for UAVs, featuring a compact hybrid electrical architecture and an extraordinary power-to-weight ratio. An optional hybrid-boost mode can provide an additional 15 kW of power,enhancing payload capacity and take-off performance for both fixed-wing and VTOL UAVs.
The SP-180 SRE can operate on either gasoline or heavy fuel. Its housing is water-cooled, while the rotor is oil-cooled, ensuring reliable performance even in challenging flight conditions. standard fuel injection is included, with an optional high-pressure fuel injection (HPI) system available upon request.
Discover more: SP-180 SRE Wankel Rotary Engine
Our drone engine construction kit is based on one of our essential engine designs, which can be outfitted with a carburettor and our latest fuel injection technology. Optional components include an exhaust system, silencer, or ECU (engine control unit).Additionally, the engine can be supplied with an e-drive or generator, utilizing a converter to produce electrical energy for batteries and super-capacitors. This allows the engine to function as a pure power generator for electric motors or as a hybrid system combining electrical and combustion energy.Discover more: UAS Engine Construction Kit
With over 35 years of expertise in engine development and associated systems, our expert Engineering Services provide a complete service catalog for the development of tailored propulsion concepts, optimization of existing systems, and integration of propulsion solutions into UAS platforms.
Engine Break-In Testing
Sky Power can perform break-in testing for your UAV engines on our in-house test stands, tailored to your specifications. This process ensures you receive a ready-to-fly engine that can be deployed instantly in your UAS or provided to customers, saving readiness time and enhancing convenience.
Endurance and Specification Testing
Sky Power conducts engine tests based on your specifications, simulating each unique usage parameter and thoroughly documenting the results. Our precise instruments allow for accurate measurement of fuel consumption, engine parameters, and exhaust gas temperatures.
We also perform endurance tests, subjecting your engines to 50 to 200 hours of continuous loading on our in-house test stands, along with climate tests. After each test,the engines are disassembled and inspected,with complete test results provided to you.
Our comprehensive testing capabilities include:
- General performance assessment of combustion engines
- Thrust and power measurement
- Exhaust analysis
- Engine indexing
- Endurance testing
- Blower,water,and oil pump analysis
- Cylinder-head measurement
- Load-change calculations
- EMC measurements
- Climate and temperature testing.
Overhaul and Maintenance
Detailed maintenance steps for each engine, which can be performed by the operator, are outlined in the operating manual, along with maintenance intervals. We can provide a spare parts kit for each engine, enabling you to conduct these tasks independently at any time.
More extensive maintenance tasks can be carried out by sky Power at our facility in Germany – please reach out to our Service Department for further details.
Upon reaching the maximum time between overhauls (TBO), which varies based on operating conditions and maintenance frequency, Sky Power can perform the overhaul at our facility.
Repair
In the event of a crash or significant incident, engines must be repaired by Sky Power’s Service Team – please contact us for an initial assessment of repair feasibility before sending in the engine. Comprehensive engine tests are conducted as part of the repair process to document the engine’s operational readiness.
Custom Service Options
We can create tailored service plans and modifications based on your specific requirements. Please contact our Service Department for more data.
Discover more: Engineering Services
UAS Project Development
Whether developing a single engine or a complex propulsion system, Sky Power collaborates with you throughout all phases of product development. Our project consulting service offers technical expertise and experience to define the project scope and the level of support required, which may include program development and system integration services.
Sky Power can manage the entire project lifecycle, from initial concept to serial production. Early collaboration ensures a more comprehensive service from Sky Power. Technical specifications, timelines, and budgets must be clearly established in advance to facilitate agile management of the complete UAS project development.Discover more: UAS Project Development
