Bunny (oz9913)

 

Bunny (oz9913) by Don Burt from Superior Flying Models 1976 - plan thumbnail

About this Plan

SFM Bunny. Radio control sailplane. Wingspan 73in, wing area 580 sq in.

Quote: "The Bunny is a 73in span sailplane designed for both thermal and slope soaring manufactured by Superior Flying Models, 4027 South 275th Place, Auburn, Washington 98002. Priced at $25.00, this Standard Class glider has a total wing area of 580 square inches and a recommended flying weight of 24-48 ounces, depending upon ballast used.

The materials used in construction are balsa and plywood with hardware including two control horns, two snap links, brass elevon bearing, four self-tapping screws for the control horns, EK Logictrol adjustable tow hook and mounting hardware, two threaded pushrods, one piece of nylon fabric, 12 inches of 1/16 music wire, a 4 inch length of plastic tubing (1/16 I.D.), 7 inches of 1/4 in diameter dowel and mounting hardware for the servo mount. The plans consist of two sheets measuring 42 in by 30 in with building instructions included on the plans sheet. Some unusual features of the kit include the 1/8 wing leading edges as well as the nylon stabilizer mount tubes and the fact that only 3 degrees of dihedral is used due to the swept wings. In addition, there is an excellent booklet on thermal and slope soaring techniques included in the Bunny kit from Superior Flying Models.

RCM's prototype of the SFM Bunny weighed 25 ounces ready to fly for a wing loading of 6.2 ounces per square foot. Metallic gold Solarfilm was used on the fuselage and transparent blue Super MonoKote on the wings and empennage. An Ace Digital Commander radio was used for guidance. We found that the kit was extremely easy to construct and the laminated balsa fuselage is quite strong. The recommended balance point and tow hook locations were positioned right on target as shown on the plans.

The Bunny has a very flat glide with smooth flat turns. In addition to being a general competition and sport machine, we will also say that the Bunny is quite suitable for beginners. On the slope the machine handles light lift quite well..."

Qute: "I've finally found the Don Burt 'Bunny' after about 6 months of searching. Don produced his models up until the '80s when he passed away. We will always miss this outstanding brother modeler. Don campaigned his Bunny and, in his hands, she was formidable. Bunny is light and super clean and can turn inside the big sleds and climb in the smallest thermals. A full flying stab makes for slick trim changes and super elevator control. The Bunny is at home on the slope, as well, and can handle a fair amount of wind easily. Best wishes, Jeff."

Direct submission to Outerzone.

Update 26/03/2018: added kit review (RCM April 1976), thanks to RFJ.

Supplementary file notes

Kit review.

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Bunny (oz9913) by Don Burt from Superior Flying Models 1976 - model pic

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