Jim:
The 1/2A PF & the Akromaster are the same size, they fly fine with the same size system as my brother & I demonstrated a couple years ago at the Fly In. Dave's Akromaster was converted from a "gassie" and weighs 18 oz RTF. My PF was built for electric from the start and weighs 15 oz. Both birds use the same power system - Brodak EPS-10.