When I was a kid in high school in Chicago, in the 50's, I was one of the few guys from my elementary school to go to what would now be called an area vocational school, Lane Technical High School. In addition to traditional shop classes like woods, metals, electronics, auto's & mechanical drawing, they offered shops like foundry, forge, sheet metal, air-conditioning, model shop, printing, welding & aviation & others that slip my mind after all these years. I elected to take aviation shop.
We had many different configurations of piston engines which we were required to do specific operations on & others that were cut-aways for reference only including a turbo-jet. We also had several different types of running engines that we were able to practice tuning & adjusting the carbs on like Lycoming 7 & 9 cylinder radials that were used in military tanks with huge cast iron flywheels instead of propellers. We had a completely operational Piper Cub air frame which we stripped the fabric off of every year & replaced it. At the end of the year, the instructor taxied it down the football field getting it a few inches off the ground before returning it to the shop.
But the highlight of the semester was the Allyson inverted V-12 engine, liquid cooled, reportedly taken from a P-51 Mustang, mounted on a highly modified Model-A Ford chassis. It had a clubbed prop (chopped short to clear the ground) with a steel cage surrounding it & a bucket seat well offset so the driver could see around the huge engine which hung well over the front & rear of the chassis. The throttle lever had a steel bar welded across to limit its travel to less than 1/4 of its full open position. During the last week of school our instructor would drive it out to the football stadium & run it at 1/4 throttle from goal post to goal post. It would reach speeds of 60 or more mph's & with only the exhaust manifolds, was the loudest sound I've ever heard then or since. Even though it was solidly mounted, our instructor told us if the throttle was ever open fully, the 1500 H.P. behemoth would tear itself off the chassis while probably rendering the whole outfit airborne. I will never forget how the ground shook as it rolled by. I can only imagine the modern rules & regulations that would prohibit that today. Those were the good old days for sure!