My first (model) engine

[55fairlane]

My first non automobile/ racing/ motorcycle/ performance engine build, this is your fairly standard wobler engine.....⅛ inch bore X ¼ stroke. Couple of unique features, the 1/16 crank pin for the piston, is ⅛ drill rod turned down & held in by Loc-tite, the spring is captured by both a nest and a nested nut (simple counter bore) the cylinder pivot is ⅛ drill rod held in by Loc-tite.
This little engine runs very well on 1 or 2 PSI of air

 

[GreenTwin]

Nice little engine build.
My dad started with a very simple engine like that, which I think he saw in a Live Steam magazine article (one of the two in the photos below).
After that, my dad could not stop building engines, and he ended up building perhaps 38.

Perhaps the same engine as the red one below.
.

 

[SmithDoor]

Looks great ?

Dave

 

[olympic]

Nice.