e/Elbow engine

Information
has gloss	eng: An elbow engine is a piston-based engine typically fed by steam or compressed air to drive a flywheel and/or mechanical load. Although not commonly used today for practical purposes, it is still built by hobbyists for its uniqueness.
lexicalization	eng: elbow engine
instance of	(noun) external-combustion engine in which heat is used to raise steam which either turns a turbine or forces a piston to move up and down in a cylinder steam engine