Bigmowr3
Dave writes – “[Here are] projects done by a high school physics club over 30 years. Pedal-power dry submarine, R/C lawn mowers, 3-axis flight sim cockpit, R/C live-video-eye rockets, 3-tier beer brewery, motorized bikes, rocketry ignition systems, home-made X-ray system, homemade fireworks, simple-to-Make Stirling engines and simple bronze casting.”Link.

Pictured here, radio controlled lawn mower – Link.