I have scanned the 3-View into the CAD program and am ready to trace the outline of the aircraft.

There are many ways to skin a cat, and I always draw my aircraft to the scale of the model, not to the scale of the real aircraft. I think it is easier – a 3mm balta sheet gets drawn with a thickness of 3mm. No conversion is required once the 3-Views have been imported and scaled to the size of the model. It also makes it easier to “plug in” models of servos and engines to see if they fit.

The 3-Views are almost always slightly off. They have been distorted by the photocopy process, humidity and other factors. They are hardly ever completely symmetrical, and the left and right side of the aircraft may not correspond 100%. The same with the top view – it may not correspond 100% with the side view, etc. etc. This is where common sense comes into the picture.

Odd measurements should probably be rounded to the nearest integer numbers, i.e. the width of the fuselage was measured as 24,119 cm (1.20595 m on the real airplane) and was rounded down to 24 (1.20m on the real airplane). The distances between wing ribs should probably be identical too. It is more likely that the guy who drew the 3-View was sloppy, than the engineers at the Gerhard Fieseler Werke spread out the wing ribs at random distances. It is quite tedious work, but once done, I have a 3-View with all the measurements I need.