Thermal Chaser (oz200)


Thermal Chaser (oz200) by Gil Shurman 1940 - plan thumbnail

About this Plan

Thermal Chaser. Non-scale mid-wing cabin sport rubber model, from 1940 Flying Aces magazine.

Update 28/7/2022: Added article, thanks to

Quote: "Build This Swell 'Thermal Chaser'. When Ace gas-job designer Gil Shurman tacked his drawing paper onto the drafting board he had a whole slew of great ideas. And when a petrol builder turns to rubber craft, almost anything can happen! This time, though the old stick-to-your-own-game idea didn't hold, for this Thermal Chaser'proved to be a top-notch sleek-sailer! By Gilbert Shurman Author of Gas Job Mike (oz5138), Rambler (oz12763), Gasoliner, etc.

AFTER the Nationals have passed into history every summer, lucky winners usually loaf on their laurels - if they've won any - while less fortunate ones resign themselves to the lull of mid-summer activities - until it's time to again prepare for the Grand Brawl. So at the request of ol' Doc FA, the author wracked his gray matter to design a ship that would pack the punch of the proverbial shot in the arm. And the Thermal Chaser is the one inducement to bid that lull a bye-bye !

This little ship consistently turns in top-notch ROG flights with only 400 hand winds. And hand launched hops have been clocked for times that would make any fan happy. Okay, that's enough of that. Here we go with all the dope.

Fuselage and Wing: The Thermal Chaser has a 22 inch span, elliptical wings and stabilizer, and a diamond-shaped fuselage. What's more, she's even simple enough for a beginner to make. Before starting to build the model, read the instructions carefully to be sure all construction details are thoroughly understood.

The fuselage drawings are shown half size. This will necessitate their enlargement to full size. Only the outline of the top view is necessary, for in construction the 1/s" square longerons are pinned to the top and the bottom half of the fuselage built first. When completed, it is removed from the plan and then the top half is built onto the bottom segment.

In enlarging the plans, a greater degree of accuracy may be attained by using a pair of dividers when taking measurements from the drawings. And during the construction of the fuselage, it is advisable to use several temporary 18" square braces to hold the main longerons apart and in their correct shape.

The main bottom stringer, marked S-3, is cut from 1/8 sheet balsa. The correct shape of this part may be transferred onto the balsa by placing the plans over the wood and pricking through the drawing with a pin. After S-3 has been cut out, it is glued to the rear of the main longerons and propped up in the front 7/8 in from the table by a temporary piece of 1/8 square balsa.

Now all the 1/16 braces are cemented in their correct positions. When dry, remove the lower half of the fuselage from the plan and attach S-2, propping the front up 2 in from the main longeron. Add cross braces of 1/16 square balsa and then attach S-1, using as many pins and temporary braces as necessary.

Before the nose of the fuselage can be finished, it is necessary to add the 1/16 square auxiliary stringers. These are glued directly to the braces and fair neatly into the rear of the fuselage.

At the nose, the auxiliary stringers are pulled together and cemented to the front body braces; then the braces from the front of the fuselage to the cabin can be glued in place..."

Supplementary file notes



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Thermal Chaser (oz200) by Gil Shurman 1940 - model pic


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