Well...we might as well beat this subject to death.Everything in the last input is correct...The original Ace is the 76" version and was published in the November 77 issue of RCM...Im sitting looking at a copy of this issue.I also have a set of Sky master plans for the 84" big lazy ace,and as a matter of fact this plan has both a flat bottom airfoil,and a semisymetrical, and templates for both,builders choice.It also has two options for the tail feather shape,the original and the rounder shape,with an airfoil stab,which is the one I used.If I ever build this size again,Ill try the semi airfoil,and put ailerons on both wings.Im flying this current one with a Quadra Q400 which is 39cc and this is a perfect match IMO.I have had five different engines in this current model (31cc weeder conversion,ST 3250,Quadra 35,Zenoah G62 and this current Quadra).
One other mod spit.....dont use the monkey motion bellcrank setup for the ailerons.Just bury one servo in each panel and connect it to the aileron with a short straight 4/40 pushrod.Syncro them if you have a computer radio,or use a reversing "Y" harness in the aileron channel if you dont.....