Jak-7 with M-82 engine It took me too long looking at Jak-3U, but it had different gear, armament and air-intakes
Very good Snejk Jak-7 M-82A. 2x20mm canons in wings, 1xUBS under engine cover. Lowered back of hulk and rich equipment I found 1 photo in Aj Press "Jak 7 i 9" but not much technical data or history of this prototype