Ty pravyi, aper.
I tested the turn rates of the Yak-9U, La-5FN, Fw 190A-5, and P-47D-30. While the La-5FN had good times for either left or right, the Fw 190A-5 had roughly the same time as the La-5FN going left! And the Yak-9U had times that were comparable to the P-47D-30!! My tests were all on the deck, 100% fuel, using WEP and one notch of flaps as needed. Test times were after turn speed had stabilized.
I think you and Verm are right. Something is wrong with turn rates in general. Not just with the Yak-9U.
[This message has been edited by leonid (edited 07-17-2000).]