(Rus)   Yak-3 in flight. The cockpit test pilot V.P. Rastorguev.

The Yak 3R was fitted with an RD-1 GHSH liquid fuel rocket, developed by W.P. Glushko in 1944 and flown by V.I. Rastorguev. The aircraft reached 509.5 mph at 25,590 ft but on the third test flight, on 16 August 1945, the rocket exploded killing the pilot and destroying the sole Yak 3R.