RE: Scale pattern plane?
Actually the 1/7 TF Mustang does fly pattern manuevers very well, however, the take off and landings on grass will net you low scores very quickly!!
I have the ARF version with a YS 120 and it will do slow and point rolls almost like a pattern plane. Nice LARGE round loops, but it takes some rudder work to keep your heading true.
In thick grass there is zero hope of landing without nosing over. I have shimmed the gear, moved the CG back etc etc with little positive effect.