Are you curious about what makes rotary engines tick? Understanding the top manufacturers and their factories is crucial for enthusiasts and buyers alike. Discovering the best options can lead to superior performance and reliability. Dive in to explore our comparison and find the perfect rotary engine for your needs!
Freedom Motors
Product Details: Rotapower® engines by Freedom Motors are designed for various applications including ground, sea, and air, offering high power density and low emissions.
Technical Parameters:
– Power density: High
– Emissions: Low
Application Scenarios:
– Biogas generation
– Advanced air mobility (AAM) VTOL aircraft
Pros:
– Compact design
– Resistance to hydrogen sulfide and siloxane
Cons:
– Limited market penetration due to range anxiety
– Potentially higher initial investment
LiquidPiston | Reinventing the Rotary Engine
Product Details: LiquidPiston develops compact, powerful, quiet, efficient, low-vibration, multi-fuel capable combustion engines that are scalable from 1HP to over 1000 HP.
Technical Parameters:
– 10x more power
– 30% more efficient
Application Scenarios:
– Military and aerospace markets
– Industrial and commercial applications
Pros:
– Less weight and space
– Improved efficiency and low noise
Cons:
– High degree of investment risk
– Speculative and illiquid investment
Rotapower® Series – Freedom Motors
Product Details: ROTAPOWER® Series Rotary Engines with Limitless Applications
Technical Parameters:
– Max. Horsepower: 360 hp
– Engine Displacement: Up to 3180 cc
Application Scenarios:
– Handheld power tools, small gensets
– Larger hybrid vehicles, snowmobiles, ATVs, jet skis
Pros:
– High power output per displacement
– Lightweight and compact design
Cons:
– Some sizes have not yet been tested
– Limited availability of certain models
Advanced Innovative Engineering (UK) Ltd
Product Details: AIE Wankel rotary engines including models 40S, 80S, 225CS, and 650S with varying horsepower.
Technical Parameters:
– 40S – 5 BHP
– 80S – 15 BHP
– 225CS – 40 BHP
– 650S – 120 BHP
Application Scenarios:
– UAVs and RPAS
– High-performance vehicles
– Hybrid propulsion systems
– Unmanned ground vehicles
Pros:
– Lightweight and efficient
– High power-to-weight ratio
– Patented cooling technology
– Low total cost of ownership
Cons:
– Limited information on specific performance metrics
– Potentially higher initial investment compared to traditional engines
Wankel SuperTec
Heavy Fuel, Gasoline Engines & Wankel Rotary UAV Engines
Rotapower® Engine Performance – Freedom Motors
Product Details: Rotapower® Engine Performance
Technical Parameters:
– High Power to Weight Ratio: More than 1.5 HP per pound of installed weight
– Specific Fuel Consumption < .45 lb./HP-hr
Application Scenarios:
– Marine
– Motor Vehicles
Pros:
– High performance in a small package
– Few moving parts leading to longer life and lower cost
Cons:
– Limited information on specific models
– Potentially higher initial investment
Rotary Engines – Woelfle Engineering GmbH
Product Details: Aixro rotary engines including XF40, XH40, XP40, and XR50 designed for various applications.
Technical Parameters:
– Compact design
– High performance with a flat torque curve
Application Scenarios:
– Manned and unmanned airplanes
– Generators and off-road vehicles
Pros:
– Low emissions
– Lack of vibration due to balanced rotating masses
Cons:
– Limited information on specific performance metrics
– Potentially higher complexity compared to traditional engines
12 Engine Manufacturers in 2025 – Metoree
Product Details: Engines and engine-related products from various manufacturers including internal combustion engines, electric motors, and hydraulic engines.
Technical Parameters:
– Power output
– Fuel type
Application Scenarios:
– Industrial machinery
– Transportation vehicles
Pros:
– High efficiency
– Wide range of applications
Cons:
– Environmental impact
– Maintenance requirements
Rotary engine – All boating and marine industry manufacturers – NauticExpo
Product Details: Rotary engines from various manufacturers including Dongguan Quanly Technology Co.,Ltd.
Technical Parameters:
– Power: 0 kW – 39 kW
– Engine speed: 1,000 rpm – 16,800 rpm
Application Scenarios:
– efoil
– e-surfboard
Pros:
– High torque output
– Compact design
Cons:
– Requires specific installation
– Potential compatibility issues with existing systems
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Comparison Table
| Company | Product Details | Pros | Cons | Website |
|---|---|---|---|---|
| Freedom Motors | Rotapower® engines by Freedom Motors are designed for various applications including ground, sea, and air, offering high power density and low emissio… | – Compact design – Resistance to hydrogen sulfide and siloxane | – Limited market penetration due to range anxiety – Potentially higher initial investment | freedom-motors.com |
| LiquidPiston | Reinventing the Rotary Engine | LiquidPiston develops compact, powerful, quiet, efficient, low-vibration, multi-fuel capable combustion engines that are scalable from 1HP to over 100… | – Less weight and space – Improved efficiency and low noise | – High degree of investment risk – Speculative and illiquid investment |
| Rotapower® Series – Freedom Motors | ROTAPOWER® Series Rotary Engines with Limitless Applications | – High power output per displacement – Lightweight and compact design | – Some sizes have not yet been tested – Limited availability of certain models | freedom-motors.com |
| Advanced Innovative Engineering (UK) Ltd | AIE Wankel rotary engines including models 40S, 80S, 225CS, and 650S with varying horsepower. | – Lightweight and efficient – High power-to-weight ratio – Patented cooling technology – Low total cost of ownership | – Limited information on specific performance metrics – Potentially higher initial investment compared to traditional engines | www.aieuk.com |
| Wankel SuperTec | www.wankelsupertec.de | |||
| Heavy Fuel, Gasoline Engines & Wankel Rotary UAV Engines | www.unmannedsystemstechnology.com | |||
| Rotapower® Engine Performance – Freedom Motors | Rotapower® Engine Performance | – High performance in a small package – Few moving parts leading to longer life and lower cost | – Limited information on specific models – Potentially higher initial investment | freedom-motors.com |
| Rotary Engines – Woelfle Engineering GmbH | Aixro rotary engines including XF40, XH40, XP40, and XR50 designed for various applications. | – Low emissions – Lack of vibration due to balanced rotating masses | – Limited information on specific performance metrics – Potentially higher complexity compared to traditional engines | woelfle-engineering.com |
| 12 Engine Manufacturers in 2025 – Metoree | Engines and engine-related products from various manufacturers including internal combustion engines, electric motors, and hydraulic engines. | – High efficiency – Wide range of applications | – Environmental impact – Maintenance requirements | us.metoree.com |
| Rotary engine – All boating and marine industry manufacturers – NauticExpo | Rotary engines from various manufacturers including Dongguan Quanly Technology Co.,Ltd. | – High torque output – Compact design | – Requires specific installation – Potential compatibility issues with existing systems | www.nauticexpo.com |
Frequently Asked Questions (FAQs)
What is a rotary engine and how does it work?
A rotary engine, also known as a Wankel engine, uses a triangular rotor that revolves in an epitrochoidal motion within a chamber. This design allows for a compact engine with fewer moving parts compared to traditional piston engines. The rotor’s movement creates distinct chambers for intake, compression, combustion, and exhaust, making it efficient and powerful for its size.
Who are the major manufacturers of rotary engines?
The most notable manufacturers of rotary engines include Mazda, which popularized the design in their RX series, and NSU, the first to produce a commercial rotary engine. Other companies have experimented with rotary technology, but Mazda remains the leader in production and innovation.
What are the advantages of rotary engines?
Rotary engines are known for their lightweight design, compact size, and smooth operation. They can produce high power outputs relative to their size and have fewer moving parts, which can lead to lower maintenance needs. Additionally, they often have a unique sound and performance characteristics that enthusiasts appreciate.
Are there any disadvantages to rotary engines?
Yes, rotary engines can have some drawbacks, including lower fuel efficiency compared to traditional engines and higher emissions. They may also require more frequent maintenance due to apex seal wear. Additionally, parts availability can be an issue, especially for older models, as fewer manufacturers produce them today.
What is the future of rotary engines in the automotive industry?
The future of rotary engines looks promising, especially with advancements in technology. Manufacturers like Mazda are exploring hybrid systems that incorporate rotary engines for range extension. As the industry shifts towards sustainability, rotary engines may find new applications in electric vehicles, providing unique solutions for power generation and efficiency.