About this Plan
Troyka. Scale model for CL.
Quote: "Troyka - 55 in span Control line scale aerobatic model by Vladimir Novta. From Aeromodeller July 1954. This is one of my older scans, so is only 150 dpi but still gives a workable print."
Quote: "Scale control-line fans will be pleased to build from these accurate plans for a 55 in stunt model of the Yugoslavian lightplane. Troyka, by by Vladimir Novta.
ONE of the most attractive Yugoslavian light planes is the Troyka low-wing cabin monoplane, and because it posesses admirable proportions for modelling, Vladmir Novta, a Belgrade student of physics, elected to build a scale version for control line stunt. Like the majority of his countrymen, Vladimir is a meticulous builder with an eye to lightweight construction and accurate detail. The model, therefore, is no job for the beginner; but will present few difficulties for the experienced modeller.
As to performance, its ratio of wing area at nearly 325 sq in to weight at 23 ounces and power of up to 5 cc should speak for itself. This is a full- stunt design, employing NACA 0012T airfoil and a set-up using dummy ailerons as wing flaps to make it as smooth to fly as it is easy on the eye. Original had a PB Armco 3.5 diesel, but this can be taken as a happy medium between the 2.5 to 5 cc power range whic=h it is capable of handling.
Starting with the Fuselage, select a straight piece of 3/4-in sq balsa or hardwood and assemble formers 2-12 (the undercarriage should be bound to F4 and FS) on it at equivalent spacing. Four main 1/32 x 3/8 in planks are cemented in place to locate these farmers, and additional 1/32 nd planking added where necessary to strengthen the unit before withdrawing the central jig. Now fit the bellcrank detail and other internal fittings, then complete the planking and build the Fin around F12. Former F1 and the nose cowl are fitted on to the engine bearers.
Tailplane and Elevator are built up from 1/8 in strips of assorted widths, then 1/32 nd sheet covered and cloth hinged. Attach to the fuselage and link up the pushrod assembly.
Cut templates for Ribs W.1 and W.2 from 1/16 ply and sandwich nine pieces of 1/16 balsa between them. Carve down to the template contour, sand, and on separation you have a set of tapered ribs. Repeat for other wing half, then cut accurate duplicates of W.1 and W.2 in balsa..."
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This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
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