Sesqui-Scot (oz14002)

About this Plan

Sesqui-Scot. Free flight sport model for rubber power.

Quote: "Sesqui-Scot, by 'Scotty' Mayors.

Graceful of line, trim of setting, and unique in arrangement, the Sesqui-Scot is presented for this month's model project. Few models, and probably fewer actual airplanes, have been built using the negative staggered sesqui-plane line up, so you are assured of having an unusual flying model with dependable performance. The wing structure is light, yet strong, allowing a minimum of external bracing. The bottom stub wing carries the landing gear quite compactly. It is also far enough below the top wing to nullify the bad effects of biplane interference.

Simplicity is the keynote. Each part of the model has been designed to fit its component part, so that alignment of all surfaces is a fairly easy matter. With the exception of the nose block and prop, 1/16 flat and 3/32 square wood has been used throughout.

The Fuselage: This is built in the orthodox manner, using 3/32 sq. longerons, uprights, and crosspieces, as shown by the speckled appearance of the wood in the side and top view. Two identical sides are built and joined by lower and upper cross braces to form a box-like structure.

Cut the formers from 1/16 flat. Notch as shown by black spaces. Formers Number 1 through 4 are made doubly strong by using two pieces of 1/16 fiat cross grained. Glue the formers on to the box-like structure as noted, chacking their alignment carefully. Glue on the stringers, fitting them in notches pro-vided.

A seat for the bottom wing is provided by cutting from 1/16 flat, 2 pieces as noted. Notch, then glue in position. The seat for the top wing is cut in the same manner. A brace, cut from the same stock, is glued between the two pieces. To form the windshield, glue 3/32 sq pieces from the top of the upright at the front of the top wing seat to former Number 4.

Two pieces of 1/16 flat cross-grained are fitted between the next to the last upright to form the rear hook plug. Apply glue around this plug and the members to which it is attached. The rear hook is now formed from Number 12 wire and imbedded in the plug. Here, again, a generous application of glue is made. Sand the structure lightly with fine sandpaper.

Little need be said about the tail surfaces as they are built as shown, from 3/32 sq and 1/16 flat. Note the direction of the grain. Sandpaper the leading and trailing edges of both rudder and stabilizer to a half rounded cross section. Remove rough spots on the wood which might interfere with the covering. A tail skid of Number 12 wire is cemented to the rudder.

The landing gear may now be constructed. Cut 2 pieces marked L from 1/16 flat and 4 pieces marked P from 1/16 flat. Remove the center from two of the pieces marked P. Now glue a cut out piece P to a solid piece P one left and one right. The side view shows this assembly as a right-handed member, so be guided by this. After the glue has joined these pieces, cut away the wood on the cut out piece P to allow insertion of the landing gear leg L. Glue this piece in position so that it is flush with the inner wall of each of the half pants, as they might be called..."

Supplementary file notes

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