A clean, uniform cowl is the result (above left) after carefully using the paper template. All the cowl trimming is completed. The addition of rubber backed washers (above right) is expected to extend the cowl life. The Dirty Birdy
fuselage is plenty wide for two servos abreast (below left). Elevator pushrods are bent and joined together. Foam wrapped battery is installed behind servos (below right). The unused casing is for a 72 MHz antenna.
ets. The leading edges of the wings on the re- view model were about 1⁄32 inch off from meeting perfectly. A little sanding on the top edge of the dihedral brace was needed to get the leading edges to match up.
A small nylon anti-rotation pin is provid- ed to align the trailing edge of the wings. The pin fit the pre-drilled holes in the cen-
ter ribs, and provided perfect trailing edge alignment on my model. The wing forward hold down dowels and aft hold down bolts fit perfectly on my model.
At this point, the manual instructs you to install the stabilizer assembly. I’d suggest you defer that step for now. Other work still ahead is installing motor mount, engine,
fuel tank, cowl, and servos. Doing that re- quires handling the fuselage and rotating it numerous times which is much easier with- out the stabilizer. Especially in my relative- ly small shop area, it avoids “hangar rash” on the stabilizer tips.
Next step in the manual is “Install the power system”. It shows the sequence as en-
The Great Planes tube and socket stabilizer mounting design (above left) lends itself to an easy modification to make stabilizers removable if desired. Ron installed
FLYING MODELS
a plywood pad (arrow) to receive a securing screw. Bottom view of the Dirty Birdy (above right), both of the stabilizers are secured with landing gear straps.
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