Super Satan (oz8661)

 

Super Satan (oz8661) by Larry Scarinzi 1967 - plan thumbnail

About this Plan

Super Satan. Control line combat model. Wingspan 39in, wing area 310 sq in.

Quote: "Our joint design venture couples two of the top names in Combat. This fearsome combination produced a superb machine to put fear in the hearts of our top combat competition. Super Satan, by Larry Scarinzi and Carl Goldberg.

It was at the 1964 Dallas Nationals that we got together and discussed Combat trends. It was brought out that popular combat models have a maximum span of 36 in and an aspect ratio of less than 4, with trends being towards lower spans and aspect ratios in an attempt to reduce weight. In Carl's mind, the competitive flyer was overlooking the fact that lower aspect ratio models are bound to lose speed in tight maneuvers. By going to a higher aspect ratio, the model could take these turns with less loss of speed, a distinct advantage. This higher efficiency could also yield a model with less total wing area and hence more level flight speed. To test these ideas, we agreed to work together in developing as near ultimate a combat machine as possible.

The main criteria for an ultimate combat design are highest possible speed in level flight with the tightest possible turning ability with minimum loss of speed. Also important is the ability to be flown easily and with a feeling of confidence. These criteria are occasionally disputed by a few who claim that quick thinking, etc, will beat the fast combat model. All other factors being equal, the fast Combat model must then become the full-time aggressor.

Design and development of the Super Satan were aimed at fulfilling this criteria and resulted in an extremely maneuverable combat model capable of 125+mph speeds. The first test vehicle (SS #1) was built directly from Carl's straight 40 in span layout. Comparison tests of this model versus a Voodoo (oz3693) of equal workmanship showed the SS #1 equal in speed and surpassing the long estab-lished Voodoo in maneuverability and smoothness. With this and all further comparison tests, engine and prop were switched from one model to the other to prevent undue advantage.

Now came the long development trail, and many long distance phone discussions between Chicago and Whippany, NJ. To increase top speed Larry's idea of a thinner, lower drag airfoil was considered, the stumbling block being how to enclose a one-inch deep commercially available fuel tank in a wing that would be less than one inch thick. Solution was to build the center of the wing thick enough to house the tank and then reduce this thickness to the desired airfoil for the rest of the wing. This innovation proved fruitful in creating the high speed we were after. SS #2 and 3 bettered 120 mph and maneuvered quite satisfactorily.

We now had our fast model. Next area of exploitation was the relationship of engine mass to the Center of Pressure of the wing. As borne out in previous models, eg Blitz (oz3049) MAN, July '64, turn resistance is reduced when the engine mass is moved closer to the Center of Pressure. With the engine mounted against the leading edge (LE) of the wing, this distance is automatically shortened by virtue of a narrow chord with a high aspect ratio wing. To locate the engine even closer to the CP, it was decided to notch or cut back the leading edge of the wing. This, along with some extra LE sheeting, was incorporated in model #5, which frequently bettered 124 mph while maneuvering with blinding agility. No. 5 proved to be a real wildcat.

Both SS #5 and 6 produced a new structural problem as long, thin, fast wings' develop higher stresses in tight maneuvers. This was initially solved by reinforcing the LE with spruce strips, and subsequently simplified by use of plywood. Use of tapered wings has greatly alleviated this problem.

The various airfoils used in the preceding six test models were now evaluated. The thickness percent used so successfully on SS #5 was chosen for all following versions.

Models #7, 8 and 9 were used to further test the effect of various leading edge sheeting layouts. None proved as good a flyer as #5, clearly demonstrating the importance of leading edge sheeting geometry toward maintaining a true airfoil when so thin a wing is used.

SS #10, 11 and 12 were used to further investigate leading edge arrange-ments and the flyability of the tapered wing. The tapered wing was chosen for two reasons: (1) It lightens airloads at the wing tips thus reducing stress at the center; and (2) tapered wings fly and handle better through tight maneuvers.

Machine #12 proved to be another step up, outperforming all previous versions. It has flown consistently in the 125 or better mph range since its creation and, of equal importance is its lightning-like response when sharp control commands are given. With a proper engine run, the model seems to bounce off a rubber wall when direction is reversed by a half loop.

A Fox .36X BB was used in all final tests and is recommended. Speeds achieved on regulation combat lines and Blast fuel were 125-128 mph on 8 x 8 small hub Tornado nylon props, and 120-124 mph on Top Flite 9 x 7 wood props.

Use of 8 x 8 props has not been readily accepted on conventional combat designs as they tend to bog down during maneuvers. By comparison, the Super Satan exhibits less drag not only in level flight but through maneuvers as well, making it well suited for use with higher pitch, some-what unconventional (in combat) props. We hope you will give various 8 x 8's a fair try; however, a word of caution. Some thin blade 8 x 8's tend to throw blades at high rpm's..."

Quote: "Steve / Mary, Here is the plan of the Super Satan Combat Wing and wing template for a Fox .36X BB with a 39.5 in wingspan. I cleaned and unskewed this plan for an individual, I'm uploading it to the ZONE for all to use! George"

Direct submission to Outerzone.

Update 04/05/2017: added article, thanks to RFJ.

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Super Satan (oz8661) by Larry Scarinzi 1967 - model pic

Datafile:
  • (oz8661)
    Super Satan
    by Larry Scarinzi
    from Model Airplane News
    September 1967 
    39in span
    IC C/L
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 26/04/2017
    Filesize: 734KB
    Format: • PDFbitmap
    Credit*: GeorgeAlbo
    Downloads: 1008

Super Satan (oz8661) by Larry Scarinzi 1967 - pic 003.jpg
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Super Satan (oz8661) by Larry Scarinzi 1967 - pic 004.jpg
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