glider tugs would be a tiny minority of chev powered aircraft. There are quite a few different aircraft powered by them. There is a canard pusher ,I forget the name of them . A lot of titan mustangs. Cessna 172s. The Vickers Vimy replica had 4 of them.
John Williams the owner of titan aircraft died last year in a chev powered mustang. The new propeller exploded while doing a demonstration flight . A car pulled out onto the only road he could land on so he forfeited his own life rather than crash into his neighbour in the car. Nothing to do with the topic but a tribute to a brave pilot.