Coyote Jr (oz15939)

About this Plan

Coyote Jr. Radio control sport model. Wingspan 54 in.

Quote: "Dale Tattam takes us through the building and evolution of The Coyote Junior, a shoulder wing Racer styled model.

The prototype was built by Bill Lubbock, who has flown my large Coyote many times, and enquired about building a smaller one. So after the plans had been drafted, he was given a copy. Fourteen days later an uncovered model appeared at my workshop, this was a complete surprise to me. He asked if I could give him a hand to tissue a model he had built for his nephew, which I did.

I did not recognise the model he had brought with him, until he chuckled, well you designed it, you should know what it's called! You could have knocked me down with a feather! This was Bill's first plane from a plan, a good test for any design and we think he has made a very nice, neat model.

To business: Let's start by cutting out all the parts, like 18 ribs, leading edge and aileron sub spars. Okay? Now the ribs in the centre section have larger slots for the spar doublers, ie 1/4 x 1/2, make sure you taper these as this reduces the stress while we pull lots of Gs. I use 6mm hardwood from 'Super stores'. The ribs in the centre section need a hole drilled through for the push rod, then pinning all the ribs together sand to a nice uniform section. Now mark and cut off the aileron pieces, right up to the rear sub spar, put them away, so they don't get lost.

First lay down the spar and ribs, you will need some scrap balsa to support the leading edge and aileron spar. I made up a long strip which holds up all the ribs at once. This allows most of the building to be completed while the wing is still on the board. Keep a good eye out for warps because they cannot be removed later!

Wings: After adding false leading edge and aileron spar, add the top spar and webs, keeping the grain vertical. When dry, add the bellccranks and top sheeting. Once these are dry, remove the wing and turn it over. Sheet the other side, add the tips, sand the leading edge square... "

Coyote from R/C Model World December 1997.

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.

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