Back in the early 2000's Parowan had a 600 HP BiPlane Ag wagon. I took a few tows in my 1958 KA6CR with that thing. Wild man JC Hutchcorne would get me to Pattern altitude before the first taxiway and often at 2000' by the end of the airstrip with a little wind. Probably burned fuel like crazy but the time under full power was very short. It seemed the tow angle was about 30 degrees, up.