Wankel Rotary Combustion Engines (WRCE):Comprehensive information source on Wankel and other rotary engines. Includes historical and technical background, images and diagrams.
Antonio Sanchez Engineering: Hybrid piston-in-rotor rotary engine. Includes technical background with animations. [English, Spanish]
Archer Trice: Patented innovative rotary turbine engine. Includes technical backgrounds, experimental results, pictures, cylinder geometry and animations.
Ball Piston Engine: Simple and smooth engine concept featuring ball bearings in both rotor and stator. Includes publications, technical background and drawings.
CKE Radial Engine: Technical description of a five cylinders radial engine prototype. Includes insights, photos and animations. [French, English]
Felix Wankel Homepage: Information source on the Wankel engine technology. Includes technical discussion, animated pictures and vehicle reviews. [English, German]
Freedom Motors: Explains the basics of the Freedom engine, based on the Wankel rotary engine. Includes historical and technical background, news, FAQs, applications and contact information.
FutureWatch: From the Piston to the Wankel to the Quasiturbine: Describes the advantages and limitations of the quasiturbine technology. Includes pictures and discussion forum.
Green Engine Technologies: Information about an innovative six-stroke internal combustion engine. Includes investment information, partners, FAQ and services.
HowStuffWorks - How Rotary Engines Work: Explains the rotary engine technology. Includes technology background, photographs and animations.
Hula Engine: Patented advanced internal combustion engine concept. Includes description, technical data, drawings and video.
Idol Principle: Explains the concept of Idol engines. Includes animations, laboratory data and drawings. [English, Turkish]
Mau Enterprises: Patented innovative design with that eliminates the main drawbacks associated with a reciprocating piston engines. Includes drawings and animations.
Orbiting Piston: Patented, innovative rotary internal combustion engine which orbits instead of rotates and has piston like chamber action. Includes theoretical and technical background, specifications, diagrams and patent.
Oscillator Engine: Innovative internal combustion engine technology substituting pistons by flaps. Includes technical background, animation and diagrams.
Quasiturbine: Explains the concept of quasiturbine engines. Includes theoretical and technical background, animations, drawings and references.
Ring Engine: Explains the basics of the ring engine technology. Includes technical background, animations and discussion. [English, German]
Rotary Engine Illustrated: Resource for educational material. Addresses technical background with pictures and animations.
StarApex: Picture collection of Wankel engines.
The Perfect Engine Runs on Biomass: Article about a rotary engine that can run on any fuel including powdered biomass.
Trochilic Engines: Technical review of different engine concepts. Includes technical background, licensing information, animations, glossary and faqs.
Veselovsky Engine: Description of the Veselovsky rotary piston engine from the Moscow State University. Includes technology background and drawings.
Wikipedia: Quasiturbine: Free encyclopedia article describing the concept of quasiturbines. Includes animations.