Hot Bulb Engines
Slow Runner Model Hot-bulb Semi-diesel Engine
https://www.youtube.com/watch?v=SVOgWrhM67A
World smallest working two-stroke cross-head hot-bulb engine
https://www.youtube.com/watch?v=UGksYSwFucI
igitur quī dēsīderat pācem praeparet bellum therefore, he who desires peace, let him prepare for war sī vīs pācem, parā bellum if you wan...