Check the listing for details. Air Trails SWAYBACK PLAN + CONSTRUCTION ARTICLE for 36" 1/2A FF Model Airplane. Condition: New. Listed at 14.95 USD. I AM NOT SELLING A KIT, only a new full-size copy of the PLAN & construction article for a unique bowed-wing dihedral SWAYBACK 1/2A FF nostalgia model from Air Trails. The model has a 36" span and used a Wasp .049 glow engine. The Wasp .049 was much more powerful than the O.K. Cub .049s, so equivalent electric motors would work fine today. I include a copy of this fine magazine construction article. My last picture is of the PLAN for a sister ship to the SWAYBACK that Henebry called the CHULA VISTAN. It was designed as a PAA model to lift a heavy weight inside. The wing outline is the same but the wing ribs are traditional solid balsa, not cap strip ribs he used for his SWAYBACK. I can list the CHULA VISTAN PLAN separately.