e/West number

Information
has gloss	eng: The West number is an empirical parameter used to characterize the performance of Stirling engines, and other Stirling systems. It is very similar to the Beale number where a larger number indicates higher performance; however, the West number includes temperature compensation. The West number is often used to approximate of the power output of a Stirling engine. The average value is (0.25) for a wide variety of engines, although it may range up to (0.35) , particularly for engines operating with a high temperature differential.
lexicalization	eng: West number
instance of	c/Piston engines