[–] chaimanmeow 5y ago ↗ while looking at that came across this, which seems like the way to do it. steam for an added efficiency stroke:https://en.wikipedia.org/wiki/Six-stroke_engine#M4+2
1 comment
[ 3.1 ms ] story [ 10.0 ms ] threadhttps://en.wikipedia.org/wiki/Six-stroke_engine#M4+2