 One of the tests with these racks had the aircraft diving down upon the target; the first example of dive bombing in the Soviet Union.The I-5 was also used to evaluate the accuracy of the RS-82 rocket, although they are not known to have been used by the aircraft in service.I-5s called up during the emergency in 1941 were converted for use as fighter-bombers by adding two more machine guns, and some aircraft were fitted with the heavy bombs that had been rejected earlier.