Double-Decker (oz10450)

About this Plan

Double-Decker. Hand launch biplane glider model.

Quote: "This nifty all-balsa biplane glider has plenty on the ball. Wait until you see it fly. Double-Decker, by Austin Rinaldi.

HERE it is, something different - a Class B hand-launch biplane glider that's a peach in looks and in flight. Despite the theory that monoplane gliders are superior, this ship was designed, and after some changes here and there, has proven itself in many contests a match for the ordinary monoplane glider. It is of simple construction and can be easily built by anyone who has made other gliders. It is just the job for you model builders who are getting tired of that same glider everyone brings to the contests.

This ship can also be used as a catapult glider by cutting a catapult groove in the lower section of the body. Not once while being catapulted has it looped, but climbs until the power is exhausted and soars around, turning in good flights. But without going any further, the picture and plan impress you enough. Check the bill of materials printed on the plan and see how little it will cost to build this biplane glider.

Construction. The first job in construction is the wings. The plans are full size, so all you have to do is trace the wing pattern on a sheet of x 2 inch medium-size balsa and cut to shape the four half wings. Sand these to the airfoil given on the plan. When this is done glue in dihedral of both wings (making sure that both wings have the same amount of dihedral) and then set aside to dry.

When dihedral is completely dried, polish wings with either clear or colored dope, whichever you prefer. The next thing is to cut out body from 1/4 x 2 in sheet of medium-hard balsa, sand to cross section as given on plan, and rub a coat or two of glue into body to strengthen it before polishing.

In cutting out slot for lower wing be sure that it is set at 0° incidence (this is very important) and cut groove for upper wing which must also be set at 0° incidence. Then glue lower wing in place. When it dries, glue on upper wing, and while that's drying, cut out stabilizer and rudder..."

Direct submission to Outerzone.

Added article thanks to Mary, from https://rclibrary.co.uk/title_details.asp?ID=2285

Supplementary file notes

Article.

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