Ole Tiger. Radio control scale pylon racer model. Wingspan 74 in, area 1,100 sq in. For .60 power. Scale is 1/3.
Quote: "A Sport Scale treatment of a Formula I racer that may also be an answer for the FAI Turn Around Pattern! Ole Tiger, by Dan Santich.
Pattern Airplanes have probably become the finest state-of-the-art designs of any group of models in our hobby. The evolutionary trail, however, has led us into a very narrow valley. The flight line at almost any pattern contest resembles a sky full of copies of undistinguishable character. Add to this the absence of genuine interest, and you have an extremely boring day. Many attempts have been made to revive pattern interest and recognition. I must admit some progress, however small, is better than none. The 'Vegas' type airplane has probably generated more interest than anything. With the new rules providing ground for any scale-type airplane, a whole new ball game is underway.
There are those who do not agree with the 'turn around' concept and feel like a change to that style is too radical. After all, they contend, after spending a lot of time and money becoming proficient with what they have - along comes something new. Their point is valid. But pattern will die on the vine without new concepts. No one dictates a winner - the trail to a winning design is usually a long one with additions and changes along the way. In the end we have our desires represented with a poten-tial winner. The only ingredient left is our ability to fly the thing the way the judges say we should.
The idea of the Ole Tiger was conceived by a fellow modeler who wanted something different. He felt, as I do, that the designs available in the pattern market-place were neither good nor inspiring. His parameters were these: A .60-powered, larger than usual, highly maneuverable, lightweight, constant speed, eye grabbing, semi-scale model! Quite a challenge indeed.
After considerable research for the ideal platform, I was left with this result: There just are not that many airplanes that fit into that mold! We were after originality as much as performance - was the water that shallow?
I've always had an eye for the Formula I type airplanes and feel that, if designed properly, almost any of them would make fine flying models. There is a wide variety and the recognition factor is quite favorable - enter the Ole Tiger.
The design of the Ole Tiger was just what I was looking for - clean, simple, dramatic, and different. Having a near center line setup for the aerodynamics, the idea began to form with sketches and doodles. My pattern friend Tom Miller and I discussed what we wanted in a plane, besides appearance. It would have to have a thick airfoil, but, as most people know, thick airfoils tend to bounce in rough air. Back in the '60s, I designed a pattern ship called the Cardinal (oz7750) that had the best stability characteristics I've ever seen in a model. For the most part, this was due to the airfoil. I know, because I tried several different ones. This airfoil is the same one used on that model—and you'll love it!
If I could dictate the kind of perfor-mance I wanted in a pattern ship, it would probably be this: Positive response, stable, constant speed, vertical performance to infinity, axial, symmetrical in any attitude, clean rolling, and wonderful. The Ole Tiger meets all of those prerequisites. In fact, the airplane has so much potential I honestly feel there are few pilots who will e.ver use it to its fullest potential. If this model is built light and true, the only thing holding it back is the man at the controls.
A .60 engine is the only way to go with this model. Weight is such an important factor that the additional ounces of a larger engine do nothing for it, but detract from the design envelope. I know because I've tried one Mine flies best on the World Engines O.S. .60 FSR ABC that I first installed. Tom Miller's performs breathlessly with his YS .60 on a pipe. As you can see in the photos, Tom ran his pipe right through the middle of the fuselage and dumped the exhaust at the rear of the wing. The servos are mounted on either side of the pipe ducting. He uses a 13x5 prop trimmed at the tips. I'm not saying a high performance .90, such as a Rossi, wouldn't work, it's just not needed. With a wing area of 1,100 square inches carrying a loading of 9 pounds, you have some kind of performance!
This is one model that enjoys the rate changes on the new radio systems. The snap characteristics are predictable and controllable at will. At nominal altitude, the model will reverse spin direction with-out hesitation. Inverted, the model tracks dead true. Knife-edge is accomplished with only slight rudder deflection and will continue from horizon to horizon. Roll rate, fast or slow, requires only aileron and is absolutely axial. When you point it in any direction, it stays dead-on until you tell it to change. What we have here is an airborne robot ready, willing, and able to do anything you ask.
This is one heck of a model! If you give it a chance, it will make you very happy indeed, and satisfy that urge we all have to do something different - and still win that contest! Since the design is so new, contest exposure has been small, but, where shown and flown, it has generated much interest. For the Sport Scale fans, the design speaks for itself. Easy colors and markings, three-views from several sources, and a fine flying airplane make the Ole Tiger a winner..."
Direct submission to Outerzone.
Update 05/07/2018: Added article, thanks to RFJ.
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