Akron Favourite (oz16258)

About this Plan

Akron Favourite. Rubber competition model. Wingspan 41-1/2 in.

Quote: "A trophy-winning stick model with an impressive record earned at major contests. Akron Favourite, by Jack Swartz.

During the 1938 contest season Akron contest fliers flew models of this design with exceptional success. The high places - first, fourth, sixth and seventh - which they won in the stick event, were responsible for the Akron delegation winning the Megow Trophy - an award made at the Nationals in 1938 for the most successful competing club. Later in the summer, models of this type again performed successfully. This time in Akron at the National Meet of the Junior Aviators of America it placed second. fourth and eighth. The durations of the flights ranged from well over ten minutes for first, six minutes, several live and four-minute flights, and a low of three minutes.

National Aeronautic Association rules for 1939 model flying have a change that is especially interesting tl) modelers flying a rubber-powered model in the stick event. A stick model is defined: "A model of the stick type has a body composed of a single stick or open framework, rather than a fuselage. Models using tubes or a framework to inclose time motors shall have a total maximum cross-section area of stick hot greater than L^2/200, where L equals the length of the stick."

In previous years there was no ruling on the cross-section area of the stick. The result was that modelers were able to remove the landing gear of a fuselage model and fly it in the stick event. This year's ruling will prevent this. Stick models will have to be designed especially for this one event and converted fuselage models will he ruled out because of excessive cross-section area.

This model is eligible for contests under the new rules without any changes. The stick length is 39-1/2 in. This is the value of L. L squared equals 1560. Dividing by 200 equals 7.80, which is the maximum square inches of cross section allowed in this fuselage. Since the fuselage shape is a square with a maximum edge of 2-3/4 in, the cross-section area is 7.56 square inches - which brings the model within the ruling by .24 square inches.

The weight ruling for this type of model is the same as last year. The model must weigh at least 3 ounces for each 100 square inches of wing area. Wing area of the model is 197 square inches. Thus the required contest weight is practically 6 ounces. Ready-to-fly the model weighed 6.3 ounces - a safely margin of .3 ounces that won't impair the flying qualities and will make it easy for the contest officials to approve the model.

Construction: Stick or fuselage is square in cross section. It is set on edge for attaching the wings and tail. The side view of the model indicates the fuselage widths at the various stations along its length. These dimensions of 1-5/8 at the front, 2-3/4 at the wing position, etc - are measured across the side of the square. The fuselage is first laid out in two halves as indicated..."

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Supplementary file notes

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