4-stroke lawn mower engine cut away.
I took an old flat-head lawn mower engine, cleaned it up, cut up, painted it, and gave it to my son to play with.
NADA Scientific / Hybrid System Cut-Away Engine and Model
This video details the NADA Scientific Toyota Prius Cut-Away Engine. Also, there is a table-top model of the hybrid system for small-scale ...
Proton Campro CPS Engine Cut-away
paultan.org A cutaway of the Proton Campro CPS engine.