Max Harlow was an aeronautical engineer and instructor at the Pasadena Junior College.

The airplane struck the ground, still in the "flat" (longitudinally level) attitude in a bean field near Mines Field (now Los Angeles International Airport) with considerable damage; although repairable, the PJC-1 was never returned to service.

[2] Four aircraft were impressed into United States Army Air Forces service with the designation UC-80 in 1942, and used by Civil Aeronautics Administration inspectors after WWII.

[3] The PJC-2 was an all-metal low-wing cantilever monoplane with conventional low-set tailplane and a retractable tailwheel landing gear.

A tandem two-seat version intended as a military trainer was developed as the Harlow PC-5.