Sure Fire Autogiro (oz6677)
About this Plan
Sure Fire Autogiro. Free flight model from March 1948 MAN.
Quote: "Autogiros are usually tricky- but this one is a sure fire performer.
A DISTINCTLY rare item - the free flight model autogiro - has the reputation of being an extremely difficult thing to build and fly.
Demonstrating that this reputation is quite undeserved, this model is simple enough to by knocked out its an evening and is no more difficult to fly than a conventional ship. In fact, it is not even necessary to set the rotor in motion before launching. This model climbs at a steep angle and when power is exhausted floats gently back to earth on its spinning rotor, thus eliminating the chief cause of destruction of flying models, a head-on glide into a solid object.
Begin construction with the fuselage which is built up from 1/32 in medium sheet balsa. Stiffeners are used at appropriate intervals and the thin covering itt backed up with 1/16 sheet at the point where the landing gear is attached.
Nose and tail plug openings are reinforced with strips of 1/16 x 1/8 stock. The bubble canopy is carved from a block of soft balsa. Tail surfaces are 1/16 sheet and are cemented place with no offsets of any kind. Carve two end plugs; adapt one as a tail hook and the other as a thrust bearing for the propeller. he prop may be sanded down from a purchased pre-sawed blank or built up as was the original. The prop should be of medium low pitch, and diameter should not exceed 9 inches, free-wheeling would be of no particular advantage in this model.
Bend the landing gear from 1/20" steel wire and cement it to the reinforced underside of the fuselage. Wheels are 1 1/f" in diameter and must be hardwood.
The rotor and rotor mast, while quite simple, must be made exactly according to plan to obtain optimum performance. The mast is bent from a length of 1/20 in steel wire and is anchored to a plate of 3/32 hard balsa which is cemented to the top of the fuselage. A short length of drilled hardwood dowel is slipped over the mast and cemented to the plate for added strength..."
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