Wildthing (oz7913)


Wildthing (oz7913) by Derek Walton from Radio Modeller 1972 - plan thumbnail

About this Plan

Wildthing. A 32in span fun bipe for .049 engines and single channel radio control.

Quote: "Build this 32 in span FUN BIPE for .049 power and single channel R/C. Wildthing, by Derek Walton.

THIS little single channel fun bipe is a thoroughly versatile model - docile in the hands of a beginner, yet capable of performing some stunts as experience is gained. The wings, being made from 1/4 in sheet balsa, are tough, with relatively low drag, and are entirely 'finger proof' - as those with young families will appreciate!

The two-wheel undercarriage doesn't seem to be worried by grass, and Wildthing's landings on a reasonably mowed strip are quite delightful, both to perform and to watch. The prototype was built around the Cox QZ .049 glow motor (because this motor was designed for use with a muffler and so gives a better muffled performance) but is, nevertheless, quite happy with any glow or diesel motor of similar capacity. Mounting details are given on the plan for both Cox and McCoy .049 radial mount motors.

Construction: Wings. These and the tail unit are built first, as it helps to have them around when trueing up the fuselage. For the upper wing, cut a piece of 1/4 in medium balsa sheet to 1-3/8 wide, butt-join this to a 4 in wide sheet, add the 1/8 sq hardwood leading and trailing edges. Pin and weight down while drying to ensure a warp free assembly.

Mark the centre-line and tip shapes on the underside when dry, and cut and rough sand the tips to outline. Using a very soft pencil, such as a grease pencil, mark the upper side of the wing and trailing edge to the dimensions shown on the plan. Carve and sand the wing, using the pencil lines as a guide, to the section as shown, and then round off the leading and trailing edges and upper surfaces. Now lightly sand the undersurface to remove any curl that may have appeared.

Transfer the centre-line to the upper side and, using a fine saw - the X-Acto type being ideal - cut almost through. Now prop up one tip to the correct dihedral and apply a liberal amount of cement, squeezing it well into the saw-cut, and spreading the surplus over the join to form a skin about 1 in wide. Leave for several hours to set thoroughly and then turn the wing over and repeat the cementing operation.

The lower wing is made in a similar manner, this time trimming 1/8 in off a standard 4 in wide sheet..."

Quote: "Hi Steve, I scaled and cleaned this one up for you, was posted on RCGroups by RFJ."

Direct submission to Outerzone.

Supplementary file notes

Article page, text and pic.


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Wildthing (oz7913) by Derek Walton from Radio Modeller 1972 - model pic


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