Heavy Fuel, Gasoline Engines & Wankel Rotary UAV Engines

Sky Power GmbH Visit Website

Sky Power GmbH 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 (HFE) UAV Engines

Our gasoline and Heavy Fuel engines for UAVs 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.

All gasoline engines can also be upgraded to Competition series, optimized for enhanced performance with modified transfer ports and individually adjusted compression for each cylinder. Competition series engines benefit from increased power and torque, as well as improved throttle response at lower RPM ranges, and are painted with two coats of highly temperature-resistant metallic orange 2K engine paint.

Single-Cylinder Multi-Fuel UAV Engines

SP-28 Single-Cylinder Gas UAV Engine

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.

SP-28 Cylinder Design
SP-28 Single-cylinder Engine
SP-28 Single-cylinder Gas Engine
SP-28 1 Cylinder Gas Engine
SP-55 TS single cylinder UAV engine

SP-55 TS

SP-55 Single-Cylinder UAV engine

The SP-55 single-cylinder UAV 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.

SP-55 FI TS ROS compact 1-cylinder UAV engine
SP-55 FI TS ROS
SP-55-FI-TS-hybrid UAV engine
SP-55-FI-TS hybrid

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.

SP-55 single cylinder compact engine
SP-55 TS compact 1-cylinder engine
SP-55 TS Compact Single Cylinder Engine
SP-55 TS single cylinder engine compact

Compare our Single-Cylinder Multi-Fuel Engines:

SP-28 SP-55
Capacity 28 cc / 1.71 cu. in 55 cc / 3.35 cu. in.
Power 2.19 hp / 1.6 kW 4.18 hp / 3.1 kW
Speed Range 1500 – 10,000 rpm 2000 – 10,000 RPM
Weight 2.95 lbs / 1.34 kg 4.55 lbs (2.06 kg)
Fuel Injection No Yes
Electronic Ignition No Yes
Twin Spark No Yes

View our entire range of UAV engines >

Two-Cylinder Gasoline & Multi-Fuel UAV Engines

SP-56 Two-Cylinder UAV EngineSP-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.

SP-110 Two-Cylinder UAV 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.

SP-110 TS Twin Spark 2-Cylinder UAV Engine
SP-110 FI TS 2-Cylinder UAV Engine

Versions: SP-110 TS / SP-110 FI TS / Heavy fuel variant upon request

SP-110 Small 2-Cylinder Engine
SP-110 series Double Cylinder Engine Small
SP-110 series 2-Cylinder Engine Small

SP-170 TS 2-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.

Versions: SP-170 TS / SP-170 FI TS / Heavy fuel variant upon request

SP-170 twin cylinder engines
SP-170 twin cylinder gas engines
SP-170 2-cylinder gas engines
SP-170 double cylinder gas engines

SP-210 Two-Cylinder UAV engine

SP-210-series Double Cylinder Gas-EngineThe 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.

Versions: SP-210 TS / SP-210 FI TS / SP-210 HF FI TS

SP-210-TS UAV Engine
SP-210-HF-FI-TS UAV Engine
SP-210-series 2-Cylinder Gas-Engine
SP-210 2-Cylinder Gas-Engine
SP-210 Double Cylinder Gas-Engine
SP-210 Twin Cylinder Gas-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.

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.

SP-275 TS 2-Cylinder Gas UAV Engine
SP-275 FI TS 2 Cylinder Gas UAV Engine
SP-275 TS CR 2-Cylinder Gas UAV Engine

Versions: SP-275 TS / SP-275 FI TS / SP-275 TS CR / Heavy fuel variant upon request

SP-275 Double Cylinder Gas-Engine with Twin Spark Plugs
SP-275 2-Cylinder Gas-Engine for high speed training flights
SP-275 Twin Cylinder Gas-Engine
SP-275 Twin Cylinder Gas-Engine for high speed training flights

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.

Compare our Two-Cylinder Multi-Fuel Engines:

SP-56 SP-110 SP-170 SP-210 SP-275
Capacity 56 cc / 3.42 cu in 110 cc / 6.7 cu. in. 170 cc / 10.37 cu. in. 210 cc / 12.81 cu. in. 275 cc / 16.7 cu. in.
Power 4.55 hp / 3.38 kW 7.48 hp / 5.5 kW @ 6000 RPM 12.82 hp / 9.4 kW 13.41 hp / 10.0 kW @ 6000 RPM 25.73 hp / 18.92 kW
Speed Range 1500-10000 RPM 2200-6500 RPM 1000-10000 RPM (depending on version) 2200-6500 RPM 2000-10000 RPM (depending on version)
Weight 5.73 lbs (2.6 kg) 6.39 lbs (2.9 kg) 9.57 lbs (4.34 kg) 12.74 lbs (5.78 kg) 16.01 lbs (7.26 kg)
Fuel Injection No Yes Yes Yes Yes
Electronic Ignition No Yes Yes Yes Yes
Twin Spark No Yes Yes Yes Yes

View our entire range of UAV engines >

Wankel Rotary UAV Engine

SP-180 SRE hybrid Wankel UAV engine

SP-180 SRE Wankel rotary UAV engine

The SP-180 SRE is a Wankel rotary UAS 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.

SP-180 Wankel engine
SP-180 Rotary UAS Engine
SP-180 compact design engine
SP-180 electrical engine

Specifications

Capacity 180 cc
Power 22 kW / 29.9 hp @ 6000 rpm
Torque 36 Nm @ 6000 rpm
Weight 6.80 kg / 14.99 lbs
9.50 kg / 20.94 lbs with generator
Power-to-weight ratio 4.40 hp/kg / 2.0 hp/lb

UAV Engine Construction Kit

We have developed an innovative UAS engine construction kit to enable the creation of more efficient and performance-optimized engine designs. The construction kit can be used to ideally tune propulsion units to precise customer performance parameters and applications.

UAV Engine Kit

UAV Engine Construction Kit

Our UAV engine construction kit is centred around one of our basic UAV 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.

More information: UAS Engine Construction Kit

UAV Engine Accessories

HKZ 215 UAV Ignition System

The HKZ 215 is a high-performance ignition system that increases overall engine performance and improves exhaust emission values. The system features a light and robust nickel-plated aluminium housing, with a range of add-on components such as connection sockets and spark plug connectors designed for demanding applications. The ignition system is shielded, emitting only low levels of interference radiation.

HKZ 215 UAV Ignition System

More information: HKZ 215 UAV Ignition System

ECU030 UAV Fuel Injection System

ECU30 UAV Fuel Injection SystemThe ECU030 is a universally applicable fuel injection system for 2- and 4-stroke engines that can be used with both petrol and heavy fuels. An automatic controller adapts the fuel blend to the current air pressure and external temperature, and ignition is handled by four channels with two separate adjustable injection nozzles.

Pump pressure is electronically regulated, with a built-in automatic choke function. All engine data can be monitored via a PC, with an intuitive user interface that allows easy adjustment of settings and maintenance of the engine.

The ECU 030 consists of the following functional modules:

  1. Digital inputs
  2. Analogue inputs
  3. High side and low side switching outputs.

Communications are carried out via CAN bus, and include the following functions:

  1. Control of the servo motors, fuel injection system and other components
  2. Evaluation of analogue and digital sensor signals
  3. General diagnostic functions
  4. Manual diagnostic functions
  5. System updates.

More Information: ECU030 Fuel Injection System

Services

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.

Heavy Fuel, Gasoline Engines & Wankel Rotary UAV Engines
Sky Power GmbH Contact Directly
Head Office Sky Power GmbH
Hollerstrasse 12, 61350 Bad Homburg, Germany
+49 (0) 6172-265 4258 [email protected] Visit Website
USA Sky Power USA
198 Salina St, Lafayette, CO 80026 USA
+1 (303) 506 5749 [email protected]ypower.online Visit Website