The Heinkel He112 is a German fighter with a metal structure. The first prototype, designated V1, was flown on September 1, 1935. Its construction was completed two days earlier. This machine was equipped with a Kestrel engine. The V2 prototype was ready for testing in November 1935. Unlike its predecessor, it was powered by a Jumo 210C engine. On February 2, 1936, this machine had an accident. Due to the need to have an aircraft for the Luftwaffe fighter selection program, it was renovated within two weeks and on February 16 of the same year it was ready for flights. The plane was lost on April 15, 196, when it crashed during an official show for dignitaries. The third V3 prototype (W. No. 1292) was completed in January 1936. However, it made its first flight a year later, on January 25, 1937. It had different weapons than its predecessors (3 x 7.92 mm MG), and a larger radiator. The plane was lost in the crash at the turn of March and April 1937 during tests with a rocket engine. The V4 prototype (W.Nr 1974) was built between April 23, 1936 and June 10, 1936. The Jumo 210Da engine was used for its drive. It did not have any weapons. The fifth prototype of the V5 (W. No. 1951) was designated as the model for the A-0 pre-production series. It was distinguished from the V4 prototype by a two-bladed Schwarz propeller. The second copy of the pre-production series was the V6 prototype. It had a Schwarz three-blade propeller, and a Jumo 210C engine was used as the drive unit. The V7 prototype was still used in the fighter competition for the Luftwaffe. He was the progenitor of the He 112B version. First flown in October 1936. The eighth prototype of the V8 (W. No. 1954) was a machine used for later tests at Heinkel's plants. It was powered by a Daimler Benz 600Aa engine. The V9 prototype was the first B-0 version aircraft. It was powered by the Jumo 210 Ea engine and was additionally equipped with a Junkers-Hamilton two-bladed propeller. The V10 and V11 prototypes were also produced in the B-0 series. In Spain, V6 prototypes (with a 20 mm cannon) were used, in the Versuch-JagdStaffel 88 unit. After the crash of the V6 prototype, the V9 prototype was imported (for promotional and marketing purposes only). It was flown by Harro Harder, mostly ground-based destroyers. Japan purchased the V6 and V9 prototypes. Later, 30 units were ordered in the B1 version (derived from the V9 prototype), with the possibility of increasing the order for 100 more machines. However, probably only two machines were picked up: a V5 prototype (for sure) and possibly a V9. Both aircraft were designated A7He1. However, due to the use of an in-line engine in it and poor maneuverability compared to other Japanese aircraft, these aircraft were used only for training purposes. Technical data (He-112B version): length: 9.22m, wingspan: 9.09m, height: 3.82m, maximum speed: 510km / h, maximum range: 1150km, maximum ceiling 9500m, armament: fixed-2 rifles 7.92mm MG17 machine guns and two 20mm MG FF cannons.