Rotoriser. Unorthodox free flight single-rotor flying machine.
Quote: "YOU could call it a free flight, single rotor blade helicopter and you wouldn't be wrong. The Rotoriser is a model you should build when you are in the mood for something simple and exciting. Ken Willard's Rotoriser.
The Rotoriser is a free flight fun machine. It won't win any contests, nor will it set any records, but you'll have more fun with it than you'll have with many other flying machines, simply because it's easy to build, easy to launch and fly, and, by varying the trim lab on the stabilizer, you can get a wide variety of flight patterns.
The concept of the Rotoriser was developed originally by Charles W McCutchen back in 1954 [and published as the Charybdis (oz5275) flying machine]. Various designs based on the concept have been published at times, principally in European magazines. The one which appears here, with some minor modifications which I have added, was designed by a young man in Florida. I saw the machine in Vince Arias' Hobby World, was intrigued, and figured that you would be equally fascinated by its flight capabilities.
The design concept is generally called the 'McCutcheon Machine' after its inventor. However, I chose the name Rotoriser because, if you happen to get the .049 reed valve engine going backwards and try to fly it, you'll soon find out that it's a 'Rotorooter.' (Apologies to the sewer pipe cleaners, of course.) But you won't do that, will you?
Constructing the Rotoriser. Construction is so simple that you can build it in one evening and fly it the next day. So let's make one.
First, assemble all of the various components in a convenient location near your workbench. The bill of materials lists what you will need.
Make the main rotor blade out of the piece of balsa which is 1/4 x 4 x 36 inches long. Shape the sheet into a flat-bottomed airfoil as shown in the full-size cross section on the plans. Cut a slot in the center section of the main blade, 2-1/2 x 1-1/8. Insert the end of the 1/4 x 1-1/18 x 1/2 inch hardwood motor arm into the slot on the main blade and glue it in place. Reinforce this center section joint with a piece of 1/16 x 4 x 4-1/2 inch plywood, glued to the bottom. Then further strengthen it by covering that section with fiberglass cloth wrapped around it and resined in place.
Make the engine mount by gluing the 1/2 x 1-1/2 x 1/8 basswood biockson the end of the motor arm. Shape them to the contour shown in the plans. The photos show a metal mount, which is optional..."
Quote: "Hi Steve - Here is Ken Willard's Rotoriser from MB issue 03-84. A bit different to be sure but it has a wing and a prop making it an 'official' aircraft. I'm not to sure where to put the pilot! A few anti-dizzy pills before strapping in might also be in order. My modeler mind wonders if an electric power with speed control and micro servo controlled trim tab is feasible .... hmmm. It would really keep people on their toes as the 'flying machete' took to the air. If the blade doesn't get you the counter weight should."
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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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