Piper PA-18 Super Cub by Guillows

[ZIP.58]

(Part 2)
The center of gravity is marked on the fuselage and wing spars according to the plan. Now it's time to use one of my balancing devices. It consists of a piece of linen twine with a thin pin attached to each end. These are inserted into the wing spars, and the model is suspended from the twine. Tail-heavy—I didn't expect anything else! Pieces of putty are placed in the nose until the center of gravity is correct. I trimmed the model to be slightly nose-heavy. Two-thirds of the putty weight was glued into the nose in the form of pencil pieces; the rest remains as putty to allow enough clearance during flight testing. Trimmed weight is now 81 grams.

[ZIP.58]

(Part 3)
And now??? Measure the technical specifications and then take it for a test flight as soon as the weather permits!
But what is the correct wing area, and what is the wing loading?
Wing area: 8.80 dm² (A); tail wing area: 1.15 dm² (B); fuselage area: 0.35 dm² (C).
If I use only the area of the wings (A), that comes to about 9.20 g/dm²; if I include the tailplane (A+B), it's 8.14 g/dm²; if I calculate using all three (A+B+C), I get 7.85 g/dm². In any case, it's under 10 g/dm², which promises a model that flies well.

Thus, the Guillows Kit No. 303 "Piper Super Cub 95" has been transformed into a "Piper PA-18-150 Super Cub" through modifications to the cowl. Although it is now "laser-cut," the design, according to the year indicated on the blueprint, dates back to 1961!

The build was a lot of fun. I hope you enjoy following the thread, too.

Peter