Engines & Things Item #48155. 1:48 scale. Resin engine of P&W 28-cyl. 4-row R-4360 "corncob" Wasp Major, the largest displacement aviation piston engine mass-produced in the U.S. Used in Boeing 377, B-50 Superfortress, C-97, Convair B-36 and Fairchild C-119 Flying Boxcar.