[Radoye]

isnt it is the same as yak 9? or yak1B :?

Yak-1 series has nothing to with Yak-7 or -9. The -1 and -3 series are lightweight fighters while -7 and -9 are "regular" fighters. Yak-9 is a further development of this Yak-7B M-105PF, this bird comes in between the -7B we have in game (the "razorback" version) and the Yak-9, this was the first of the "heavy" Yaks to feature cut-down rear fuselage and an all-round canopy. Yak-9 introduced further aerodynamic refinement and some equipment upgrades.