Firebird II - Radio control sport model, for .61 power. Plan shows two alternate wing drawings, at 100in and 60in wingspan.
Quote: - "The Firebird II is a two times larger version of the original Firebird (oz6747) from RCM, June 1981. Powered by a good .61 engine, the Firebird II with two sets of wings, can match whatever type of flying you enjoy.
Firebird II is a big airplane. In fact it is twice as big as the original Firebird which was the subject of my 'design and build' article in the June 1981 RCM. All dimensions of the original have been substantially doubled giving Firebird 2 a wingspan of 100in or 60in or anything in-between which the builder chooses. Like the first Firebird, this airplane is a mixture of the characteristics of the Heath Parasol, the Corbins, the Pietenpol Sky Camper, Sky Scout, etc. Based on those airplanes, the 100in wing is approximately 1/3 scale and a 75in wing would be 1/4 scale.
Using the 100in wing, the airplane flies nicely between 20 and 25 mph. Remembering that the full scale airplanes cruised at between 60 and 75 mph, Firebird II can be flown at exactly scale speed. Ofcourse this is a slow cruise. With the K & B .61 engine used in the prototype, and the 100in wing, the airplane has been timed at 44 mph at full throttle and will do 58.mph with the 75in wing..."
Article pages, thanks to hlsat, JHatton.
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