Hi Robotech,
How much does your Sukhoi weigh?
Mine weighs 16.25 lbs with a Brison 3.2.
Swings a 21x10 Menz S at 6800 rpm at a temp of 32 F and 7100 at a temp of 70 F.
22x10 Menz S turns 6600 at a temp of 32 F.
I didn't know temp would make such a difference.
John
PS: I am at 2670 ft ASL.
Density altitude on a 70 F day is 4000 ft.
Density altitude on a 32 F day is 1000 ft.