The file 'New Turbine Propeller Design For Boat Jet Drive 3D Printer Model' is (stl) file type, size is 1.6MB.
this jet drive is designed for a pipe ID of 120mm dia pipe. Its Shaft is sized for a (22.25mm) 7/8" Dia. based on 40 degree pitch angle. fins are 5.5mm thk. This model will print perfectly with no supports needed.