Tan-Giro - Control line gyrocopter sport model.
Quote: "You'll stop the show when you put this spectacular rotary-wing job aloft. In flight it looks just like a big tandem rotor helicopter with lines reminiscent of the Piasecki and Bristol machines. Although the appearance of the model is very close to the double-ended helicopter types it is really more closely related to the gyrodyne family - rotary wing machines which may rise up vertically, like a helicopter, but which depend upon a propeller for forward motion. In this respect it is somewhat similar to an autogyro.
To avoid mechanical complication our model uses a short ground run instead of vertical take-off. With this system it is not necessary to power the rotors and taking off with forward speed is more practical in a controlled model because it keep the lines tight.
Okay, it sound great, but how does it handle? Is it hard to fly? How does it behave in a breeze? The answers are that this model is actually easier to fly than the average sport job. The control response is very smooth and positive and it stays right out at the end of 50 foot lines with any good .19 as high as you'd care to fly any non-stunt type model of this weight, and the wind bothers it less than fixed wing models. There is a barely perceptible cyclic slap from the rotors, but, far from being a nuisance, this gives the "feel" of real rotary wing flying.
You do not require any particular knowledge of rotary-wing craft to build and fly it successfully. Begin with the fuselage which consists of two 3/32 x 3 x 36in sheet sides cut to shape. The bulkheads are 1/8in sheet and the two rotor mast carrying bulkheads should be cut from very hard stock, or else substitute plywood. You will note that the fuselage follows very conventional construction lines for sheet balsa building and requires little or no explanation except at the front end. This model differs from usual controlliners in that the elevating surfaces are at the front end instead of the tail..."
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