About this Plan
Chubby. Control line sport biplane model. DC Dart .5 diesel shown.
Quote: "A fully aerobatic biplane for .5 - .8 cc engines, specially designed for easy building by Vic Smeed.
THE ATTRACTION of a small model capable of stunt manoeuvres cannot be denied nor can the challenge that such a model offers design-wise. Quite the biggest problem is the relationship between engine weight, model weight, and power output.
Chubby represents one approach, leaning, if anything, towards the sturdy side but still capable of the simpler aerobatics - loops, etc - on a .5 cc diesel.
Construction is very simple and very quick. If you don't mind stripping 13 in lengths off, the whole model can be built from a sheet of medium soft 1/8 by 3 in balsa and a few square inches of 1/16 in ply, plus the hardware.
First cut two main fuselage frames, one from 1/8 in balsa and one from 1/16 in ply. Pin the balsa one over the plan and build the rest of the fuselage framework from 1/8 x 1/2 in. Cut a 5/16 in wide strip from the 1/8 in sheet for the piece over the lower wing mount and the front upright. A scrap 3/16 in wide will be needed immediately aft of the bell-crank.
The ply plate should be cut to fit the motor to be used. Mark the small binding holes, which should he drilled and the head filed off at one side of a 6 BA bolt. Slip a washer on the bolt, fit the bellcrank..."
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