ABSTRACT
The basic design of a purely rotary motion engine has
potentially many advantages over the conventional
piston-crank internal combustion engine. Although only
one rotary engine has been successfully placed into
production, rotary mechanisms still show promise in the
market place. A comprehensive review of rotary engine
concepts is presented with an emphasis placed on the
last 30 years. Suggestions are made as to where
research concentrations should be placed to improve the
progress of a rotary engine.