When I was young, we had two of them. We lived in SW Montana, in the mountains, and it was 28 miles to the nearest plowed road in winter. We used these to get to the car, which was stored in "town".
One had a Kinner 5, the other actually had a Wright Whirlwind.
A lot of years later, in conversation with a couple of fellows restoring antique aircraft, they noted how hard it was getting to find rebuildable antique engines. I mentioned these sleds, and their engines, and these guys got pretty interested. I understand they did go to that part of Montana, and bought some engines.
MTV