Contestar (oz2591)


Contestar (oz2591) by Chuck Giessen 1951 - plan thumbnail

About this Plan

FF Contestar. Free flight power model by Chuck Giessen.

Quote: "A beautiful streamliner that's ideal for free-flight newcomers. FF Contestar, by Chuck Giessen.

Up to the time this article was written, our FF Contestar had racked up two Firsts, two Seconds and a Third in local contests. Originally weighing 24 ounces and powered by an Ohlsson .23 glow-plug engine, it was later changed over to ignition power, using a Torpedo .29 engine. The increased power and rate of climb more than compensated for the higher wing loading.

The first step in building this contest-proven free-flight ship is to scale up the plans to full size. Then, check the Bill of Materials, gather together all the necessary material, and let's get going!

FUSELAGE: Start by building the 1/4 x 3/8 crutch directly over the top view of the fuselage. While this is drying, cut out the bulkheads. All of these are made from 1/8 hard sheet balsa - with the exception of the firewall, front former, and F-14, which are cut from 1/8 plywood.

Now, cement all the bulkheads in position on the crutch, making certain they are aligned perfectly. Then add the top and bottom stringers, along with the sub-rudder.

Next, construct the pylon and pylon platform, using a hard grade of balsa for the pylon. The wing rest is laminated from 3/16 sheet, having the grain of the top piece run across the fuselage and the grain bf the bot-tom sheet run front and rear. Cement the pylon and platform into position and set aside to dry.

Then the rest of the stringers are added. To avoid any possible warping of the structure, it is wise to add one stringer on one side, then the one opposite, following this procedure until all stringers are in place. It will be necessary to taper the bottom stringers at the rear so they will blend into the sub-rudder. Add the 1/8 sheet fill-in at the front of the fuselage and then begin work on the wing.

WING: Cut the ribs from 1/16 sheet stock. This done, pin the leading edge, trailing edge, and tips in place on the plans. Don't run the leading and trailing edges in one continuous piece..."

Update 21/07/2019: Added article, thanks to RFJ.

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Contestar (oz2591) by Chuck Giessen 1951 - model pic


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