outside world in turns while taxi not fluid

I notice that the outside world, looking thru the cockpit window is not fluid during a sharp turn while taxiing on the airfield even with a solid FPS at 25. It's a somekind of stutter.Is there any tweak to solf this?Happy Landings...E6750 on 3,2Ghz Gigabyte P35-S3 2x 1Gb 800Mhz DDR2 Nvidia 7600GT2x Samsung SATAII 300Gb in Raid 0 WinXP Pro. FSX has it's own IDE 7200 XP start-up drive. FSX installed on it's own partition on Raid 0NHancer with Clamp on, 4x AA 16x AS. In dence areas 20-25 FPS