I've been a fan of the Pacific Ace free flight model for years. I've built several of the 30" span rubber models. I converted one to electric, but the wings were not strong enough to carry the extra weight of motor and electronics of the day.
I've just completed the 74" span RC version that was published in RCM. My PA weighs 3 lb 15 oz and is powered by an OS .30 4 stroke. I'm looking forward to the first flight which should happen tomorrow.