VQ Models - L-4A Grasshopper 94.5in Wingspan ARF (Camoflauge)Piper developed a military variant ("All we had to do," Bill Jr. is quoted as saying, "was paint the Cub olive drab to produce a military airplane"), variously designated as the O 59 (1941), L 4 (after April 1942), and NE (U. S. Navy). The L 4 Grasshopper was mechanically identical to the J 3 civilian Cub, but was distinguishable by the use of a lt Plexiglas greenhouse skylight and rear windows for improved visibility, much like the Taylorcraft L 2