I tend to agee with Bob,,I think 13 1/2 or 13 3/4 would be ideal for 1/5 scale.At a true 1/5 scale a 5' 9" figure would measure out to 13.8" . A lot of 1/5 planes are actually at 2.25" per foot scale which is slightly smaller than actual 1/5, but still larger than the 1/6 or 12' figure from BBI or Dragon.I have a Dragon stuka pilot whose hand is way too small to grip the MG81z thatI scaled at 2.25" to the foot.

Paul S.