[DiogenesLamp]

Inefficient at converting linear reciprocating to rotary motion.

How is a swash plate inefficient? If it does not produce heat, and I cannot imagine that it does, or at least not much, how is it robbing power?

[TexasGator]

“If it does not produce heat, and I cannot imagine that it does, or at least not much, how is it robbing power? “

Everything in an engine robs power and creates heat.