The Sniffer-PF (for Park Flyer) is the same as the origianl free flight design with an instruction Addendum by Harry Stewart, and a complete hardware package for converting the model to electric RC. Model has a 30″ wingspan and 139 sq. in. of area. The prototype weighed 5.3 oz. giving it a 5 1/2 oz per sq foot wingloading. The Sniffer-PF has proven to be a very stable flyer for a bit of relaxed nostalgia. Origianlly flown with EPU-3 brushed motor (no longer available) recomended power today is the HC-2208 brushless (m-112) with 9 amp speed control (C-M-112). 2 micro servos (HS-55) are required.