An Airman in Tachikawa, Japan, returning to the ZI gave me his Veco Papoose, about 1959. It had no motor so I squeezed in a Max 35 and the plane became a Rat Racer. It was quite fast but didn't survive very long.
I have a Papoose kit and if it is ever built, I will choose an old OS Max 15 and back away from Rat Racing. (Back then it was mostly teenagers and racing was more like Demolition Derby.)
dg