TĂșlio, that's so cool! I really like the sound effects with the real Mig-3 engine start.
Scott, the Mig-3 was produced in 1941 ( http://en.wikipedia.org/wiki/Mikoyan-Gurevich_MiG-3 ), and the P-51 was produced in 1940 ( http://en.wikipedia.org/wiki/North_American_P-51_Mustang ). They were both designed as high altitude fighters, but the Mig-3 wasn't as good as the P-51 or the Bf-109 in that roll. Or some of the other contemporary Soviet fighters for that matter.