Model Variants (Including Prototypes)
YO-59 - Artillery Spotting and Liaison variants (Piper Cub Model J-3C-65) procured by the US Army for evaluation; 4 such examples.
O-59 - Official Production Model Designation assigned to 40 examples based on the YO-59 trials.
O-59A - Specialized US Army Variant Designation; fitted with Continental O-170-3 engine; later redesignated to L-4 designation.
L-4 - Redesignated from O-59A designation.
TG-8 - USAAF Training Glider; dual controls for pilot and passenger/instructor; redesigned front fuselage; sans powerplant; 250 examples produced in the manner.
XLNP-1 - US Navy Evaluation Designation for the TG-8 training glider; 3 such examples trialled.
NE-1 - US Navy designation of J3C-65 dual-control models; 230 examples.
NE-2 - US Navy models similar to the NE-1 with slight equipment changes; 20 examples.
HE-1 - Piper J-5C Cub models procured for ambulatory service; room for one stretcher; later redesignated to AE-1.
AE-1 - Redesignated HE-1 models.