Chief (oz6829)

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Chief (oz6829) by Bill Dean 1960 - plan thumbnail

About this Plan

Chief. Radio control mod to the clasic FF glider model.

The Keil Kraft Chief (oz9) first appeared in 1950. This here this is a later article in FM 1960, detailing how the design can be adapted for single channel RC. Includes full drawings showing both the FF and RC model.

Quote: "The 'Chief' was designed some years back as a Nordic type towline to meet the A/2 specifications then in existence. The basic design did amazingly well in competition, and took many firsts in England and on the continent.

It is an ideal design for radio controlled soaring as the fuselage is roomy enough for most of the lightweight RC equipment available today. Batteries and radio replace the ballast, so the increase in weight is not a great deal. Proportions are well suited to RC, and the design is stable and easy to handle on the towline. It is an ideal project for the newcomer to RC flying, as a soarer is much more forgiving than a hot powered job.

As an A/2 without the RC, it will give you a great deal of experience in flying this exacting event. The design features an auto-rudder, which allows the model to tow straight on the line, and then wheel into turning flight as soon as released. Plug-in type wing panels are used which knock free on impact. A one-piece wing may be used, if desired. Dethermalizer is pop-up stab type..."

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Chief (oz6829) by Bill Dean 1960 - model pic

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Chief (oz6829) by Bill Dean 1960 - pic 003.jpg
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User comments

Steve, My Dad and I built one of these when I was nine. Anything was an improvement over our previous Soarer Major and I have happy memories of my father running across Minchinhampton Common with our towline holder made from a garden cane and a 16 mm film spool. Unfortunately the plug-in wings were a major flaw and they frequently folded with disastrous results. What a pity we didn't build something sensible like an Inchworm or a Caprice. Yours,
RichardFalconer - 12/07/2015
Same thing happened to a friend of mine when we were about twelve years old. He built a KK Chief and made a beautiful job of it. It was given so many coats of clear dope that it shone but it was also well over weight. We took it to a field to fly it but when it reached the top of the 50 metre towline, the wings folded. He never built a model aeroplane again. He likes to race dinghies these days.
David Davis - 05/04/2020
My school friend and I had the same problem with the wings when on the towline back around 1957. We solved the problem by rebuilding the wing box from thin plywood in place of the balsa. A must-have mod for towline use. I think I’d incorporate this in an RC version also, as a precaution.
Ian Mathieson - 26/08/2024
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