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Sky Power International

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Heavy Fuel and Gasoline Engines for Unmanned Aerial Systems Germany
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Sky Power International

Heavy Fuel and Gasoline Engines for Unmanned Aerial Systems

Hollerstrasse 12, 61350 Bad Homburg, Germany Germany Regional Offices
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Sky Power International develops two-stroke combustion and Wankel rotary engines for Unmanned Aerial Systems (UAS) and hybrid applications. All our standard engines can be tailored for military and defense mission requirements according to customer specifications.

Our engines can be used as direct propulsion, for hybrid solutions, as range extenders, or in generator function for power generation.

We develop and manufacture all our engines in Germany. Customer adaptations, new developments and the capacity extension of the combustion engines are another corporate objective.

  • SP-275 TS ROS
  • SP-275 TS CR
  • Hybrid UAV Engine

Gasoline & Heavy Fuel (HF) Engines for UAS

We offer a variety of one- or two-cyclinder gasoline and Heavy Fuel (HF) engines for UAS. Our patented engine mufflers can further reduce noise levels for covert military operations.

All UAS engines beginning at 55 ccm cylinder displacement will be delivered as a twin-spark version, with independently operating ignitions, which provides quieter running, increased safety and reliability, and redundant operation. Fuel injection options are also available.

We offer single-cylinder multi-fuel engines, two-cylinder gasoline and multi-fuel engines, Wankel rotary engines, and engine accessories.

  • SP-55 TS
  • SP-55 FI TS ROS
  • SP-55-FI-TS hybrid

View our range of Gasoline and HF engines >

skypower brochure

Download our brochure to gain detailed insights into our high-performance engines and propulsion systems.

Download Brochure

Engineering Services

With over 35 years of experience in the development of engines and their ancillary systems, we offer customers a comprehensive Engineering Services catalogue, pertaining to the development of individual propulsion concepts, optimization of existing propulsion structures, and to the integration of propulsion solutions into UAS cassis.

We offer services such as:

  • Engine break-in testing
  • Endurance and specification testing
  • Overhaul and maintenance
  • Repair
  • Customer-specific service on request

Find out more about our Engineering Services >

Products

SP-180 SRE APU Demonstrator
SP-180 SRE APU Demonstrator

Auxiliary power unit demonstrator for aircraft and land & maritime systems

SP-180 SRE Hybrid Wankel Engine
SP-180 SRE Hybrid Wankel Engine

Hybrid Wankel rotary engine for UAS

SP-180 SRE Hybrid Demonstrator Engine
SP-180 SRE Hybrid Demonstrator Engine

Demonstrator hybrid Wankel rotary engine for UAS

SP-180 HF SRE Hybrid Wankel Engine
SP-180 HF SRE Hybrid Wankel Engine

Heavy Fuel hybrid Wankel rotary engine for UAS

SP-55 TS ROS Two-Stroke Engine
SP-55 TS ROS Two-Stroke Engine

Single-cylinder UAS engine

SP-55 FI TS ROS Two-Stroke Engine
SP-55 FI TS ROS Two-Stroke Engine

Fuel injected single-cylinder UAS engine

SP-28 CR Two-Stroke Engine
SP-28 CR Two-Stroke Engine

Single-cylinder UAS engine

SP-55 FI TS Generator Application
SP-55 FI TS Generator Application

Two-stroke fuel injected single-cylinder hybrid engine

SP-56 ROS Two Stroke Engine
SP-56 ROS Two Stroke Engine

Two-cylinder UAS engine

SP-56 Two Stroke Engine (exhaust at the top)
SP-56 Two Stroke Engine (exhaust at the top)

Two-cylinder UAS engine

SP-110 TS ROS Two Stroke Engine
SP-110 TS ROS Two Stroke Engine

Two-cylinder UAS engine

SP-110 FI TS ROS Two Stroke Engine
SP-110 FI TS ROS Two Stroke Engine

Two-cylinder UAS engine

SP-170 HF FI TS ROS Heavy Fuel Engine
SP-170 HF FI TS ROS Heavy Fuel Engine

Dual cylinder Heavy Fuel engine for UAS

SP-110 TS ROS Two Stroke Engine (exhaust at the top)
SP-110 TS ROS Two Stroke Engine (exhaust at the top)

Two-cylinder UAS engine

SP-170 TS ROS Two Stroke Engine
SP-170 TS ROS Two Stroke Engine

Dual cylinder UAS Engine

SP-170 FI TS ROS Two Stroke Engine
SP-170 FI TS ROS Two Stroke Engine

Dual cylinder UAS engine

SP-170 TS ROS Two Stroke Engine (exhaust on top)
SP-170 TS ROS Two Stroke Engine (exhaust on top)

Dual cylinder UAS engine

SP-210 TS ROS Two Stroke Engine
SP-210 TS ROS Two Stroke Engine

Dual cylinder UAS engine

SP-210 TS ROS Two Stroke Engine (exhaust on top)
SP-210 TS ROS Two Stroke Engine (exhaust on top)

Dual cylinder UAS engine

SP-210 FI TS ROS Two Stroke Engine
SP-210 FI TS ROS Two Stroke Engine

Dual cylinder UAS engine

SP-210 HF FI TS ROS Two Stroke Engine
SP-210 HF FI TS ROS Two Stroke Engine

Dual cylinder Heavy Fuel UAS engine

SP-275 TS ROS Two Stroke Engine
SP-275 TS ROS Two Stroke Engine

Two cylinder UAS engine

SP-275 TS ROS Two Stroke Engine (exhaust at the top)
SP-275 TS ROS Two Stroke Engine (exhaust at the top)

Two cylinder UAS engine

SP-275 FI TS ROS Two Stroke Engine
SP-275 FI TS ROS Two Stroke Engine

Two cylinder UAS engine

SP-275 TS CR Two Stroke Engine with Rear Carburettor
SP-275 TS CR Two Stroke Engine with Rear Carburettor

Two cylinder UAS engine

SP-275 TS CR 03 Two Stroke Engine with Rear Carburettor
SP-275 TS CR 03 Two Stroke Engine with Rear Carburettor

Two cylinder engine

Documents
Sky Power Brochure
Two-stroke vs. Wankel Engines for UAVs

Articles

Sky Power Examines Two-Stroke vs. Wankel UAV Propulsion Options
Latest
Sky Power Examines Two-Stroke vs. Wankel UAV Propulsion Options

Sky Power International compares two-stroke and Wankel UAV propulsion systems, outlining how engine architecture influences vibration, integration, maintenance, payload compatibility, endurance, and mission-specific operational requirements

Jun 04, 2026
Sky Power Announces Early 2026 Appearances at Global Defense & Aerospace Shows
Sky Power Announces Early 2026 Appearances at Global Defense & Aerospace Shows

Sky Power International outlines its early 2026 trade show schedule, previewing key global events where its latest UAV propulsion technologies will be showcased

Jan 19, 2026
Sky Power’s SP-170 Engine Passes Rigorous Flight Simulation Test
Sky Power’s SP-170 Engine Passes Rigorous Flight Simulation Test

Sky Power's UAV two-stroke boxer engine demonstrates high reliability and resilience in rigorous 150-hour FAR33 endurance test

Sep 24, 2025
Sky Power to Showcase ISR UAV Propulsion Technology at XPONENTIAL 2025
Sky Power to Showcase ISR UAV Propulsion Technology at XPONENTIAL 2025

Sky Power International will present advanced UAV propulsion technologies at XPONENTIAL 2025, highlighting powerful engines, hybrid systems, and customized solutions for ISR and civilian applications

Apr 29, 2025
Sky Power Delivers Propulsion Units for Long-Range UAS
Sky Power Delivers Propulsion Units for Long-Range UAS

Sky Power International has equipped Sky Canoe’s Nimkii 42-S unmanned aerial system (UAS) with its SP-55 FI TS ROS engine, enhancing propulsion efficiency for long-range operations in remote environments

Mar 25, 2025
Mobile APU Test & Evaluation System Unveiled
Mobile APU Test & Evaluation System Unveiled

Sky Power International is now offering the SP-180 SRE APU demonstrator mobile APU test and evaluation system for tactical vehicles, only requiring a 48 V DC power supply to operate

Sep 04, 2024
New Online Store for UAV Parts & Services
New Online Store for UAV Parts & Services

Sky Power’s new online shop is a user-friendly platform, showcasing the company’s wide range of products including spare parts, tools, services, and a unique UAV motor configurator

Jul 19, 2024
Sky Power UAV Engines Complete Endurance Tests
Sky Power UAV Engines Complete Endurance Tests

Sky Power International has successfully tested the SP-110 FI TS GEN and SP-210 FI TS GEN UAV engines in accordance with FAR33

Apr 19, 2024
Sky Power Continues to Expand Product Portfolio for Service Applications
Sky Power Continues to Expand Product Portfolio for Service Applications

Sky Power International expands product portfolio for service applications with the introduction of hard-shell tool cases for both fuel injection and carburetor engines

Feb 02, 2024
Dual Cylinder UAS Engine Delivered for VTOL Aircraft
Dual Cylinder UAS Engine Delivered for VTOL Aircraft

Sky Power International has provided its SP-210 TS ROS carburetor engine for the MADDOS VTOL 600h aircraft, delivering extended flight times and enhanced cruising speed

Oct 10, 2023
Sky Power Engine Selected for VTOL Convertible Drone
Sky Power Engine Selected for VTOL Convertible Drone

The performance of the SP-110 FI TS propulsion system enables the Cavok UAS CK50 VTOL convertible UAV to fly for over 10.5 hours and allows full capacity of the high efficiency design

Aug 04, 2023
Dual Cylinder UAS Engine Now With Increased Power 
Dual Cylinder UAS Engine Now With Increased Power 

Now the optimized SP-170 FI TS ROS engine from Sky Power delivers 11.7 kW

Jul 10, 2023
Sky Power Two Stroke UAS Engine Now With Increased Power
Sky Power Two Stroke UAS Engine Now With Increased Power

The company is now offering the two-stroke SP-210 FI TS ROS in run-in condition with 14kW, equating to a power increase of 27% from the previously offered 11kW

Jun 22, 2023
Sky Power to Exhibit with UAS Global Services at XPONENTIAL 2023
Sky Power to Exhibit with UAS Global Services at XPONENTIAL 2023

Texas-based drone manufacturer UAS Global Services uses engines from German two-stroke and Wankel engine specialist Sky Power in its unmanned aircraft

May 03, 2023
Sky Power Offers Heavy Fuel and Gasoline Engines for Unmanned Aerial Systems
Sky Power Offers Heavy Fuel and Gasoline Engines for Unmanned Aerial Systems

The company develops a variety of one- or two-cyclinder gasoline and Heavy Fuel (HF) engines which can be tailored for military and defense mission requirements according to customer specifications

Mar 28, 2022
Regional Offices & Locations
Sky Power GmbH Germany Hollerstrasse 12, 61350 Bad Homburg, Germany +49 (0) 6172- 594 9 005 Contact Contact Website
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