Auster did make a 'Tugmaster' version but an Auster would be an unusual tug choice these days (possibly as a demonstration, towing an equally vintage glider) .... the Piper Pawnee (normally an ag-sprayer) was the tug of choice when I was gliding ....and I guess its toughness and ability to 'get up there and get down again quick' would mean it's still popular.
K
