Tiger Moth Crop Duster
Jack,
With tank full of fuel, 400 lbs max in a hopper in the front cockpit. No dump system, no brakes, propeller very fine ie 3" 7" pitch for max pull. 2" keel welded on the tail skid for taxying control, usually a piece of a large file or section of a bulldozer blade. Cockpit fuel cock wired to the on position to prevent inadvertently turning it off. No engine run ups, just listen to it. Great fun, I loved it.
O.P.