Target and Bullseye (oz6425)

 

Target and Bullseye (oz6425) by Larry Scarinzi 1962 - plan thumbnail

About this Plan

Target and Bull's-eye. Two plans together on one sheet. Control line sport 'flying saucer' fun models. Target is 19in span, for Fox .15 power. Bullseye is 8in span, for Tee Dee .010 power.

Quote: "Double Your Pleasure, Double Your Fun with this Control-line Double Header. Target and Bull's-eye, by Larry Scarinz1.

Because flying saucers hold so much fascination for model builders, myself included, I decided to build a .15 powered version of this strange craft. After years of building high performance stunt and combat models, we just couldn't settle for run of the mill per-formance. To build just to be different is not enough. Our initial feelings at the outset of this project was that a circular planform was not the ideal aerody-namic shape for a high performance control-line model. Being open minded, we did not let this throw us, but instead put some serious thought into weight distribution, airfoil and balanced elevators. The balanced elevator as used in this type of flying wing has been popular with others and myself in our New Jersey area since the early days of stunt and combat flying. Having been convinced of its superiority for over ten years, I strongly advocate its use.

After some planning a structure was decided upon and the first .15 powered saucer was built with rewarding ease. The trim used seemed only a natural evolution and, hence the name 'Target' was chosen.

It was a cold day in January when we, along with our fearless flying companion 'Bolting' Bill Ledden (well-known for catching airplanes), set out for the local snow covered flying field to test fly our newly-created craft. With a sweet singing Fox .15x in the nose end, we were confident that we had what it takes in the power department. Upon launching, we were immediately satisfied with performance that proved to be out of this world. Guess 10,000,000 Martians can't be wrong after all. The model handled well and was capable of turning extra tight maneuvers without loss of speed. Flying characteristics are somewhat similar to the flying tail models so commonplace in the combat circle.

It was during completion of the 'Target' that a thought dawned: Every target should have a bull's-eye. And why not? With a Cox .010, it was easy to make a model of appropriate size and name it the Bull's-eye. A Bull's-eye was built following the principles that were used in the Target.

First test flight of the Bull's-eye was steady but it would turn only wide maneuvers when flown on 10 feet of dacron lines. A slight warp was also evidenced when it was noticed that the model would bank in towards the flier during outside loops. To partially remedy this on the field, an excessive glob of modelling clay was stuck on the extreme end of the outside wing (wing?). This moved the CG aft and towards the outside of the circle. With this added weight the model performed flip-flop loops just inches off the ground. Always thought this was a cute trick. Visualize yourself standing on your toes and holding the handle high over your head with full-up control and the Bull's-eye flopping end over end about a foot in front of your feet. Some fun.

This model did not give the immediate success that the Target did. After adding the glob of clay to the outside wing, low level flight was difficult and the model had developed a tendency to slacken on the lines in certain instances. The wing was steamed straight and experiments were planned on finding a proper CG location and the right amount of wing weight.

The first available day was a snowy Saturday when I conferred with a Martian saucer expert, Leroy Ducharme. After much talk and free coffee, we braved severe Arctic conditions in Leroy's back yard to test our theories. On our first try we decreased the outboard wing weight. The performance of the model improved greatly. After flying the model several times, we finally arrived at quite a happy compromise of CG location and outside wing weight. We are convinced that the amount of outside wing weight used in short wingspan models (8 inch on the Bull's-eye) is far more critical than that used on bigger wingspan models..."

Direct submission to Outerzone.

Update 01/12/2016: added article, thanks to RFJ.

Supplementary file notes

Article.

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Target and Bullseye (oz6425) by Larry Scarinzi 1962 - model pic

Datafile:
  • (oz6425)
    Target and Bullseye
    by Larry Scarinzi
    from Model Airplane News
    1962 
    19in span
    IC C/L
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 13/03/2015
    Filesize: 447KB
    Format: • PDFbitmap
    Credit*: dfritzke
    Downloads: 1834

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  • Plan File Filesize: 447KB Filename: Target_and_Bullseye_oz6425.pdf
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