Soar-Cy II (oz8721)

 

Soar-Cy II (oz8721) by Stan Yeo 1973 - plan thumbnail

About this Plan

Soar-Cy II. Radio control slope soarer. For two or three function radio.

Quote: "A well-tried beginner's slope soarer tough, docile and easy to build.

THIS is a beginner's slope soarer that was designed for a beginner. The construction has been kept as simple as possible, and as strong, without incurring too high a weight penalty. In fact, the model weighs 2 lb which is about average for its size. This gives a wing loading of 12 oz/sq ft, and a model that will withstand all but the severest of prangs.

Soar-Cy was designed during Easter 1969, after a friend lost an eye trying to tighten his engine mounting screws while the engine was running! The model was built in three weeks, the fastest, at that time, that I had produced a model. There is, however, a lot less building in a slope soarer than the average power model. The model flew well enough but, due to my limited ability and poor sites, I did not take to slope soaring any too well. Some time later I found some friends who were aeromodel-lers of long standing, and this recharged my batteries, so to speak, and I set about sorting out the limitations of (a) my flying ability, (b) the local slope sites and (c) Soar-Cy I.

To get my flying up to scratch I went back to thermal soaring which, in my opinion, is the easiest way to fly. Next I explored the countryside for suitable slope soaring sites and, finally, I redesigned the model. I kept the same basic shape and just stretched it in all directions, except the wingspan. The construction was updated from the experience gained with the first model. S

Soar-Cy II took eight days to build, and was equipped with two channel radio on rudder and elevator. Because I had retained the full-depth main spar of the original model on the thinner Mk II wing, I encountered rib bowing problems, which led to the wing being written off. As a result of this I returned to a more conventional main spar and built a new wing - this time incorporating ailerons. This was my first attempt at using ailerons and I approached the first flight with some apprehension. I need not have worried because, after getting used to them, I found the model much easier to fly, particularly when landing.

My friends had, by now got hooked, and were busily building Soar-Cy IIs, one of which is still flying. I don't know whether it is the sign of a well proven model or a bad designer, but ten significant modifications have been made to the original design, and I have had to make a new plan of Soar-Cy II.

At the time of writing, some twenty Soar-Cy Ifs have been built and flown successfully. All were built as first slope soaring ventures and, in most cases, they were first ric ventures. The model can handle virtually any wind condition, from the lightest to the strongest although, at the latter end, you might have to use ballast. For the real beginner I would recommend rudder and elevator but, if you have a little experience, you should try ailerons and elevator. So build yourself a Soar-Cy and add a little more fun to those picnics in the country. As a second bonus, the model will fit into the boot of a Cortina ready assembled!

Construction: As I have already said, this is a very easy model to build..."

Soar-Cy, Radio Modeller, April 1973.

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.

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Soar-Cy II (oz8721) by Stan Yeo 1973 - model pic

Datafile:
  • (oz8721)
    Soar-Cy II
    by Stan Yeo
    from Radio Modeller
    April 1973 
    51in span
    Glider R/C
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 12/05/2017
    Filesize: 419KB
    Format: • PDFbitmap
    Credit*: Circlip
    Downloads: 1765

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Soar-Cy II (oz8721) by Stan Yeo 1973 - pic 008.jpg
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User comments

Please find attached 3 pictures of Stan Yeo's Soar-Cy 11 built from Outerzone plan oz8721 [more pics 006-008]. The only changes I have made is to include 2 aileron servos in the wings and to include a D box leading edge to the wing and cap the wing ribs, simply to protect the wings from the gorse which proliferates our Devon flying sites. Not yet had its maiden flight, I will report back later.
MartinBright - 10/07/2018
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Scaling

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