4AC-150 Series 50 of , equipped with optional float kit J3F-60 Certified 13 April 1940 and equipped with a Franklin 4AC-150 Series A of or a Franklin 4AC-171 of J3F-60S Certified 31 May 1940 and equipped with a Franklin 4AC-150 Series A of or a Franklin 4AC-171 of , equipped with optional float kit J3F-65 Certified 7 August 1940 and equipped with a Franklin 4AC-176-B2 or a Franklin 4AC-176-BA2 of J3F-65S Certified 4 January 1943 and equipped with a Franklin 4AC-176-B2 or a Franklin 4AC-176-BA2 of , equipped with optional float kit J3L Certified 17 September 1938 and equipped with a Lycoming O-145-A1 of or a Lycoming O-145-A2 or A3 of J3L-S Certified 2 May 1939 and equipped with a Lycoming O-145-A1 of or a Lycoming O-145-A2 or A3 of , equipped with optional float kit J3L-65 Certified 27 May 1940 and equipped with a Lycoming O-145-B1, B2, or B3 of J3L-65S Certified 27 May 1940 and equipped with a Lycoming O-145-B1, B2, or B3 of , equipped with optional float kit J3P Variant powered by a Lenape LM-3-50 or Lenape AR-3-160 three-cylinder radial engine J-3R Variant with slotted flaps powered by a Lenape LM-3-65 engine. J-3X 1944 variant with cantilever wing powered by a Continental A-65-8 engine. L-4B Prospector Canadian manufactured model, with removable rear seat and control, additional capacity, optional extra fuel tank and painted in a PA-12 color scheme. Cammandre 1 A French conversion of J-3 Cub/L-4 aircraft Poullin J.5AFive L-4 Cubs converted by Jean Poullin for specialist tasks. Poullin J.5BA single L-4 Cub converted by Jean Poullin for specialist tasks Wagner Twin CubA twin fuselage conversion of the J-3 Military YO-59 Four US Army Air Corps test and evaluation J3C-65 O-59 Production version for the USAAC; 140 built later redesignated L-4 O-59A Improved version, powered by a 65-hp (48-kW) Continental O-170-3 piston engine; 948 built, later redesignated L-4A L-4 Redesignated YO-59 and O-59 L-4A Redesignated O-59A. L-4B As per L-4A, but without radio equipment; 980 built L-4C Eight impressed J3L-65s, first two originally designated UC-83A L-4D Five impressed J3F-65s L-4H As per L-4B but with improved equipment and fixed-pitch propeller, 1801 built L-4J L-4H with controllable-pitch propeller, 1680 built UC-83A Two impressed J3L-65s, later redesignated L-4C TG-8 Three-seat training glider variant, 250 built LNP United States Navy designation for three TG-8s received. NE-1 United States Navy designation for dual-control version of J3C-65, 230 built NE-2 As