3W International Heavy-Fuel Aircraft Engines for Naval Applications

3W International

3W International (3W) supplies patented next-generation heavy-fuel (HF) engines for helicopters, unmanned fixed wings, and hybrid unmanned aerial vehicles (UAV) in the naval industry.

Two-stroke aircraft engines for naval applications

3W offers a wide array of customisable two-stroke engines in one, two or four-cylinder configurations.

All engines are available as a twin-spark (TS) version for increased safety and reliability.

Available with auxiliary systems, carburettor or electronic injection, 3W engines are custom-made according to the required performance parameters, or the used aircraft or fuel type.

The company also offers a range of complete propulsion systems ready for immediate deployment.

Lightweight Wankel engines for increased field payloads

The 3W-180 SRE Wankel Rotary UAV Engine is a compact hybrid cycle engine, which is lightweight and offers a high power-to-weight ratio, enabling higher payloads during field operations. With the hybrid-boost power capabilities, an additional 15KW simplifies its lift-off or acceleration processes.

The engine can be powered using gas or HF, so the company also supplies a standard manifold or a high-pressure injection (HPI).

Muffler systems to reduce engine volume

3W’s mufflers use a type of turbine wheels that are permanently installed in a cylinder to increase performance while simultaneously minimising the volume.

Individual, wheel-mounted fins are organised in defined angles to level out the exhaust gas’ sound wave.

Innovative technologies for optimal TBO

3W specifies time-before-overhauling (TBO) timeframes that vary from 400-600 hours, depending on the conditions of use, engine maintenance, and the RPM range.

Optimal performance is possible if engines are driven at moderate speeds and regularly serviced.

About 3W International

3W’s wide variety of long-term tests is individually adapted according to customer specifications, and performed using high-tech measuring instruments.

The company’s high-performance engines highlight a combination of its technical expertise, more than 35 years of industry experience, tradition and innovative production capabilities.

From R&D, testing, purchasing, manufacturing and calibration to in-time delivery, 3W guarantees constant and permanent quality control and its personnel are directly responsible for maintaining the company’s high level of standards.

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Press Release

Unmanned Technologies and Security Expo and Conference (U.T.SEC) to Take Place in March

The second edition of Unmanned Technologies and Security Expo and Conference (U.T.SEC) is due to take place between 7-8 March at the Exhibition Centre Nuremberg in Germany, in parallel with Enforce Tac, the special exhibition for police equipment.

White Papers

Multi-Fuel Engine Product Portfolio

In 2007, 3W International began to research and develop its first heavy fuel engines. Several developments were made and tested until the R&D department decided on the final engine design.


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Products and Services


Press Release

7 February 2018

The second edition of Unmanned Technologies and Security Expo and Conference (U.T.SEC) is due to take place between 7-8 March at the Exhibition Centre Nuremberg in Germany, in parallel with Enforce Tac, the special exhibition for police equipment.

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11 January 2018

After its very encouraging launch in early-March 2017, preparations are now taking place for the second U.T.SEC - Unmanned Technologies and Security - Expo and Conference.

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2 January 2018

3W-International presented the 3W-180 SRE hybrid Wankel engine at the Xponential held mid-last year.

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31 August 2017

After recognising that muffler systems are becoming a focus of engine development, 3W-International began developing a series of in-house mufflers.

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31 July 2017

3W-International merged with Forum Luft and Raumfahrt Baden-Württemberg late last year. The Baden-Württemberg aeronautical network represents the interests of the aviation industry in South West Germany, serving as a network hub between business, science, politics, and society. The networking's focus is to enhance the global competitiveness of resident companies.

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2 July 2017

3W-International witnessed an increase in demand for heavy-fuel (HF) and combustion engines last year, particularly in their use of unmanned helicopters.

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1 June 2017

3W-International's new customer services for new and existing customers is known as 3W Engineering Services.

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26 May 2017

3W-International will present the 3W-180 SRE Hybrid Wankel for the first time at this year's XPONENTIAL Trade Fair in May to increase the company's range of drive products for unmanned aerial vehicles (UAVs).

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Regional Offices

3W International GmbH

Hollerstraße 12

61350 Bad Homburg vor der Höhe


+49 6172 80 89 34 0 www.3w-international.com

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