I-7/HD-37, Heinkel/TsKB

I-7 fighter. 36k b/w photo from the "History of aircraft construction in the USSR", Vol.1 p.436

Heinkel HD 37, single-seat biplane fighter. The HD 37 was not accepted by the clandestine German air force, but the USSR bought a small number (3?) and a licence. The idea was to replace aging I-5 until more advanced domestic designs will be ready.

134 were built in the USSR as the I-7 since 1932, with some technological improvements. Despite expectations, aircraft failed to demonstrate substantial advantages over the I-5. Plus it came 2 years late. Once the I-15 became available in 1934, I-7 production was cancelled.

The BMW VI engine was produced in the USSR as the M-17.