Hybrid piston-in-rotor rotary engine. Includes technical background with animations. [English, Spanish]

Patented innovative rotary turbine engine. Includes technical backgrounds, experimental results, pictures, cylinder geometry and animations.

Simple and smooth engine concept featuring ball bearings in both rotor and stator. Includes publications, technical background and drawings.

Technical description of a five cylinders radial engine prototype. Includes insights, photos and animations. [French, English]

Information source on the Wankel engine technology. Includes technical discussion, animated pictures and vehicle reviews. [English, German]

Explains the basics of the Freedom engine, based on the Wankel rotary engine. Includes historical and technical background, news, FAQs, applications and contact information.

Describes the advantages and limitations of the quasiturbine technology. Includes pictures and discussion forum.

Explains the rotary engine technology. Includes technology background, photographs and animations.

Explains the concept of Idol engines. Includes animations, laboratory data and drawings. [English, Turkish]

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.

Innovative internal combustion engine technology substituting pistons by flaps. Includes technical background, animation and diagrams.

Explains the concept of quasiturbine engines. Includes theoretical and technical background, animations, drawings and references.

Explains the basics of the ring engine technology. Includes technical background, animations and discussion. [English, German]

Picture collection of Wankel engines.

Technical review of different engine concepts. Includes technical background, licensing information, animations, glossary and faqs.

Description of the Veselovsky rotary piston engine from the Moscow State University. Includes technology background and drawings.

Comprehensive information source on Wankel and other rotary engines. Includes historical and technical background, images and diagrams.