Jr Sky Squire (oz12501)

 

Jr Sky Squire  (oz12501) by R Jess Krieser from American Aircraft Modeler 1969 - plan thumbnail

About this Plan

Junior Sky Squire. Radio control sport trainer model.

Note the Junior Sky Squire and the 1/2A Sky Squire (oz12020) both appeared in the same article titled "Sky Squire Compacts", in American Aircraft Modeler, June 1969.

Note this here is the Jr Sky Squire as it was first published in June 1969. For a later, CAD-redrawn version of the design, see Jr Sky Squire (oz5322).

Quote: "Sky Squire Compacts. New versions of the popular Sky Squire (oz10563) offer 049-engined GG and rudder-only flying, and a size for 15's and small digitals. By R Jess Kreiser.

I have always been interested in the smaller-sized R/C ships, as they are much easier to transport in a car, build faster, and have lower inertia loads which enable them to take more pounding around from the goofs of pilot error without fatal damage to the structure. However, there was little in reliable lightweight, compact control equipment to give rudder, elevator, and motor control for a small ship until Herb Abrams came along with a simple, reliable Galloping Ghost actuator which did away with the complicated 'bird cage' at the tail-end that always seemed to be a source of constant trouble. Later, the Dual-Pak system with twin actuators operated from a decoder offered even smoother, more reli-able control of rudder, elevator, and throttle.

When these systems came along several years ago, it seemed natural to me to scale down the Sky Squire (oz10563) to fit these systems. I started out with the 1/2A ship, for 049 to 09 size engines. By this time I had become somewhat of a convert to digital proportional, and I wanted another small edition of the Sky Squire with just enough room in it to pack in three channels of a digital system, so the Junior size version was born. This one offered more than enough room for the Galloping Ghost or Dual-Pak systems.

At the time these ships were developed. I had no idea that full-house digital systems would soon be reduced in size to 10 to 15 ounce systems. But since they have, both of these ships are right in the mainstream of the trend, and are ideal for the new compact digital systems, as well as GG and Dual-Pak systems, The new Controlaire system with 225 mah power pack and S-4 servos is ideal for either of these, and with a little extra work on the part of the builder, you can even go to ailerons on either of these ships.

However, it has been with the GG and Dual-Pak systems that these two ships have really proved themselves to date. A number have been built, with excellent flight reports. All flight characteristics that have made the big Sky Squire now kitted by Midwest so popular have been preserved. I designed this ship during my beginning days in R/C to satisfy my desire for a lazy man's airplane, that would be tame enough to learn to fly on, yet rugged enough to survive the inevitable beating that a trainer must take. The Sky Squire fulfilled all my desires to the utmost, giving me a highly maneuverable, responsive airplane, yet tame enough and stable enough that when one got into trouble, you could simply throttle back and rely on the inherent stability of the ship to get you back on the right track. It has proved so stable that the original Sky Squire was landed on a number of occasions with the transmitter turned off!

I flew the big Sky Squire for several years, going through four of them before working out the compact versions presented here. However, I never got to fly either the Junior or 1/2A prototypes that I built, as Herb Abrams traded me out of them almost before the dope had dried!

It was Herb that really proved their performance with the GG and Dual-Pak systems. He came over one weekend with the 1/2A ship that I had built, and shocked me with what he had done to it. He had stuck a Dual-Pak system in it, with an Enya 09 in the nose, bringing the all-up weight to over 2 lb, which was about 1/2 lb more than I thought practical for a ship with only 269 square inches of wing area. To make matters worse, the wind at our local flying field was so strong and gusty. that flyers with the 60-powered Taurus (oz612) were staying on the ground.

But not Herb! He came over to fly. He fueled up, started the engine, checked the system, and handed the ship to me to hand-launch. I tossed it, and up it went. Then he proceeded to stunt it all over the sky, like a big hot competition ship, and like there was no wind. Next, he rolled it inverted and flew all around the field upside down..."

Direct submission to Outerzone.

Update 05/10/2020: Replaced this plan with a clearer copy, thanks to theshadow.

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Jr Sky Squire  (oz12501) by R Jess Krieser from American Aircraft Modeler 1969 - model pic

Datafile:
  • (oz12501)
    Jr Sky Squire
    by R Jess Krieser
    from American Aircraft Modeler
    June 1969 
    48in span
    IC R/C Cabin
    all formers complete :)
    got article :)
  • Submitted: 18/02/2020
    Filesize: 892KB
    Format: • PDFbitmap
    Credit*: Circlip, RFJ, theshadow

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