Minute Man (oz1831)

 

Minute Man (oz1831) by Frank Zaic from Popular Science 1941 - plan thumbnail

About this Plan

The Minute Man. Free flight rubber model. Popular Science June 1941.

Quote: "THIS little plane, capable of flights of over 2,000 feet can be built and launched in less time than is usually required to construct the fuselage of more complicated models. Its sturdy, simple design is an in-structive example of what can be done with lightweight and quarter-grained ('C' cut) balsa sheets (see PSM, Dec. '40, p.198).

In selecting the balsa, see that it is light and shows the speckled sur-face which identifies C grain. Cut the fuselage and wing parts cleanly with a sharp blade to produce smooth edges. The dimensions of the fuselage cross braces should be taken from the numbered scale which appears in the drawings. Notice, in the detail of the nose, bow the eight braces are offset for maximum strength. Spread cement carefully along the full length of the edges when assem-bling the fuselage. The top and bottom sheets are trimmed flush with the sides after the cement has hardened.

The wing camber is obtained by moistening the under surface with water, and allowing the single end rib to extend the camber along each wing. The sheet may at first tend to curve upward, but will assume the proper downward curve as it dries. When it is quite dry, apply broad streaks of ce-ment to the underside, as shown in the drawings. These are important.

Cut the propeller blank from a straight-grained block of balsa, 7/8 by 1-1/8 by 8 inches. Because no model plane is better than its propeller, the builder is urged to read the instructions given in the article following this one.

The freewheeling device shown in the plans operates in this way: The long hook is so fastened to the propeller that it nor-mally springs out of contact with the tri-angular hook on the motor shaft. After the rubber is wound, the hooks are engaged by hand. When the motor has been exhausted in flight, the propeller overruns the shaft, and the long hook springs free, permitting the propeller to turn upon the shaft..."

Supplementary file notes

Planfile includes article.

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Minute Man (oz1831) by Frank Zaic from Popular Science 1941 - model pic

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* Credit field

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Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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