Seversky SEV-3L (oz15952)

About this Plan

Seversky SEV-3L. Free flight scale model. Wingspan 22 in.

Quote: "Building the Seversky 3-L. By Paul W Lindberg, model editor and designer for Popular Aviation.

BOTH beauty and speed have been combined in this Seversky model. When painted copper and trimmed in its colorful detail it is the envy of all model builders.

Our laboratory tests of this model show: Flights of two to three hundred feet or better. Stability very good. Controls very positive. Speed between 25 and 30 miles per hour.

In building your model, follow all steps closely for many improved features are built into each successive model by this department, such as movable control surfaces with aluminum hinges, new and improved method of constructing framework, time proven shock absorbers concealed in landing gears.

All dimensions can be quickly and accurately determined by placing a ruler on the part to be measured. The plan is printed full size. If you wish a larger model, multiply this measurement by the amount of increase.

Color scheme. Entire ship copper, identification numbers black, 'Seversky' on side of fuselage; letters blue with silver streaks in centers; model airplane on side of fuselage; silver, trimmed in black with silver streaks coming from rear, trimmings around cockpits, silver; exhausts and propeller, silver; other small details, black and silver.

CONSTRUCTION OF FUSELAGE: The fuselage sides are built from 1/16 square balsa. The longerons, verticals, diagonal braces, etc., are held in place until securely cemented, by inserting straight pins on either side of strips wherever needed, having first placed wax paper on top of plan, to prevent parts from sticking to plan. After the two sides are completed, the cross-members are cemented into their proper locations. Check carefully from front to rear for alignment.

Cut the formers from 1/32 sheet balsa and cement in their respective positions us shown on the plan. The balsa ring which fits on front of fuselage, is cut from 1/4 inch thick balsa and cemented together as shown on the plan. After this has been properly shaped and sanded cement to front end of fuselage. Next cut from solid block of balsa rear streamline tip, refer to plan, so that proper shape may be obtained, cement to rear of fuselage. The 1/32 x 1/16 stringers should now be cemented over the formers on the fuselage.

The position of stringers are shown clearly on each former. Another fine method of attaching stringers to formers are as follows: Cement top stringer working from front to rear, so that it lines up properly, next apply bottom and two side stringers. We now have four stringers on the fuselage. The other stringers should now be cemented in their respective positions, making sure that they are equally spaced. All stringers are cemented to outer edges of formers, to prevent formers from projecting through fuselage, when same is covered.

MOTOR COWLING The front part of cowl is carved and sannded to shape from a balsa block, use a stiff grade of paper for the cowl. Before cementing paper o balsa make sure you have th eproper fit, overlapping balsa 1/16 inch.

DUMMY MOTOR: The motor is built up entirely from balsa and sheets of paper. The cylinders are built first, using the sheets of paper cut into disks, etc to represent the fins. The layers in betwee these are made of sheet balsa 1/32 in thickness. These are cut smaller so as to make the cylinder more realistic..."

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