Piper PA-11 Cub SpecialPiper PA 11 Cub floatplane airplane model. The Piper PA 11 Cub Special is a later production, two place variant of the Piper J 3 Cub light propeller driven aircraft, manufactured by Piper Aircraft. Design and Development. The airframe is basically the same as a Piper J 3, but the engine mount is slightly lower, the windshield more sloped, the cowling is fully closed, and the fuel tank was raised and placed in the port wing. Mahogany wood: Scale: 1 24.