Toyan RS-S100 Single Rotor Rotary Engine Mini Internal Combustion Engine Model - Stirlingkit
The Smallest Wankel Engines - YouTube
Freedom Motors
NCSIST
Amazon.com: THYXGS Rotary Engine Model, Simulation Dynamic Engine Model, Mini Metal Engine Model Kit, DIY Assembly, Up to 600 RPM, for Tech Enthusiast, Teenagers, Adults, Teaching : Toys & Games