HE 112 U: extreme redesign of the project with a DB 601 engine "reworked" with power ratings up to 1,800 horses (such as DB 603) and radiant cooling surfaces rather than a radiator. He was a great improvement in performance, with a peak of 700 km / h. Here too, the Heinkel was unable to escape from the 'corner' in which he had confined the Messerschmitt Me 209 because he was able to slightly exceed the speed of He 100V (name by which, being a practically new project, was rightly redesigned 112U). Nine specimens were brought into experimental service, but there was not followed. Others were supplied to the Soviet Union, and the test performed Supron Stefan suffered a series of maneuvers even tried by German testers. Despite the party in a champagne that followed, the model was not recognized as valid machine operatively.
this is variant HENIKEL HE 112 U
Heinkel He 112 is very similar to the Yak 9.
I think that the Soviet Union include one of HE112 U and it has copied his techniques and his plan to produce and then rip off the famous YAK 9.
