Thermic Dart (oz11691)
About this Plan
Jetco Thermic Dart. Simple all sheet glider model.
Quote: "Hello, Attached is plan for Thermic Dart from Jetco. Design Frank Ehling, drawn by Bill Dean, wingspan 11-3/4 in. Glider. Parts are scanned and redrawn. Best regards,"
Quote: "The THERMIC DART is an ideal hand launch glider for the beginner. Designer Frank Ehling's original model is illustrated in the photo on the right.
BUILDING INSTRUCTIONS: Construction is very simple and your DART will soon be flying if you study these notes and the numbered sketches carefully. A small tube of cement is needed,for assembly - also a sharp razor blade or modelling knife, for shaping the fuselage.
1. Start by cementing the fuselage nose and boom together (note 2-3/4 in overlap).
2. Trace the fuselage outline from the full size side-view, then cut and sand the nose and tail boom to shape. Trim the tail boom on the underside only.
3. Cut a shallow 'V' at the wing position - and taper the fuselage nose and toil. Round off the fuselage corners to obtain the indicated section.
4. Sand the wing roots to the dihedral angle, then pin one wing panel down flat and cement the other to it - using the A and B jig pieces as shown.
5. Cement a 3/4 in long piece of soft copper wire under the right stab tip (dotted on stab top), then attach the stab to the fuselage. Check alignment by means of the front and rear stab notches, then add the fin.
6. Attach the wing and see that the flying surfaces line up correctly in the top and front views. Cement the X support piece under the left wing root.
FLYING: Add clay to the nose, then check-glide by launching directly into the wind, an a slightly downward flight path. Correct a 'stall' by adding nose weight, or a dive by taking some off. When the glide is correct, bend up the rear edge of the right stab tip for a left turn. Left handed builders should use an opposite trim.
Hold the fuselage at the wing trailing edge position and throw upwards as hard as you can, at about a 45 degree angle - with the wings tilted to the right. This will then give a right bank, which gradually decreases and finally changes to a left turn at the top of the climb. Make final adjustments by altering the nose weight or the bend in the stab. The fin should not be used For trimming."
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