JP 15-36 (oz14599)

About this Plan

JP 15-36 Aiglon. Radio control sport-scale glider model. Wingspan 2m.

Note the 'original' drawing here is the CAD zip download (in dwg format). That's the file that Giuseppe sent us, and that is his design, his work. The PDF file you see here is really just a taster, a PDF file in this slot for Oz users who don't have a CAD viewer.

Direct submission to Outerzone.

Quote: "Hi Mary; A small, much more semi than scale, model of a lesser known French glider. Ciao, Beppe"

Quote (google-translated from the Italian): "During the week of August 15th, not being able to get away from Cremona, even though I was on vacation, I find myself rummaging through the folder of drawings that I put aside with the name of 'just in case'.

This folder contains everything from photocopies of aircraft 3-views to model drawings, from manufacturer brochures to the life-size drawings you sometimes find in magazines.

It should be known that in the summer my flying activity takes place practically only on a slope, finding it too burdensome and not at all fun to fiddle with engines and mixtures when the heat is oppressive and the air flow rate is very high. This is the usual climate in this period in the lower Po valley. Later, when the temperature finally drops, the mosquitoes arrive.

My attention is therefore directed exclusively, or almost exclusively, to gliders. At Pordoi on the occasion of the Val di Fassa Meeting, I had had the opportunity to notice the mini models of Bxjtiino of Genoa and a few days later at Alpe di Srusi I had seen other small models fly in a more convincing manner.

In Grane some time later friend Fernard's mini Discus had begun to fly in a decidedly interesting way after a change in the position of the center of gravity.

The desire for the mini glider had already matured in me, just a little push was enough to bring it to the surface. And here, opening a natural drawing extracted from the folder I was telling you about, I was presented with the drawing of a JP 15-36, semi-scale mini glider.

The JP 15-36 is an old love of mine, so the two things put together convinced me to suspend for the umpteenth time the completion of an Extra 260 with an opening of over two meters that I've been dragging for over two years.

Work on the JP began the following morning. Within a couple of weeks the model was completed and was immediately taken to its natural environment, the slope, for testing.

On the first flight, the model dived slightly. I had already proceeded to move the battery backwards, in place of the receiver, as can be seen in the photographs, despite this, to obtain a correct centering, it was necessary to add about ten grams of lead at the tail. Having done this, the JP 15-36 turned out to be a mini glider with very good performance, in my opinion. It is very easy to handle, especially on the ailerons, so much so that I thought it useful to insert the 30% exponential to pilot gently around the neutral point without reducing the rotation speed for rolling.

With a weight of 1030 grams my model is loaded at 41 g/dm2 and has to fly with a certain speed. This helps in finding thermals. Once the desired current of ascending air has been found, it is able to remain there even with very tight spirals without ending up in a stall. Thermal utilization can be improved by using the ailerons simultaneously to change the profile. Be careful, however, a very modest downward displacement of the order of 2-3 mm measured on the trailing edge is enough. Larger displacements give only a decrease in flight speed without a simultaneous increase in lift. With the application of the command to beat the model accelerates rapidly and allows you to perform several consecutive loops or rolls..."

Supplementary file notes

Article.

CAD file

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