The first prototype Piaggio P.108B heavy bomber which commenced its flight test programme on 21 November 1939.

The I-320 (R-1) two-seat twin-engined experimental all-weather interceptor designed by the Mikoyan-Gurevich design collective in the late 'forties.

The first HAL-assembled Harlow PC-5A tandem two-seat trainer flown in August 1941 and delivered to the Indian Air Force as DR423. The main wheels are seen partly retracted in this illustration of the PC-5A taking off.