Well,
I put some flights on the tf b-25 today.... and I got to tell you that the .90 4-strokes barly pull it along! ( this was on the new expansion pack #4 on Real flight sim!)
I don't understand how in the sim. the .90 do not due very well at all and the .70 4-strokes in real life do well?
I guess chalk that one up to the unrealistic qualities in the Real FLight sim.......