I have just been involved in a very interesting discussion on the Home Shop Machinist forum about wood-fuel biomass gasifiers for ICEs, as well as some modern technology that has shown promise for steam-powered vehicles of all sizes. As for electric cars, such prime movers may be efficient and...
I attended the Threshermen's Reunion at the Rough and Tumble Engineers' Museum in Kinzers, PA last Saturday. Not much electric powered equipment, but the technology from 100+ years ago was fascinating to see in action.
The link to the exhibit facility is: