I picked up a quarter scale and a third scale Balsa USA Piper Cub kits from a garage sale last month and have been keenly building away ever since.
I really didn’t think that I had the patients for scale building, but now I’ve started, I kind of have the ‘bug’ for it. I am putting the quarter scale, 2.5m span, together first as a practice run for the “BIG” 3.5m span third scale! The quarter kit had the plans but no instructions, so I’ve been nutting it out myself ever since. The third scale has no plans or instructions, so I will draw up my own plans and enter it in the masters class. With some valuable guidance from Dave Balfour, I am trying to stay as true to scale as possible. David has an incredible eye for detail and how to replicate it, usually with an easyish method. (It still requires a LOT of patience.) I took out ‘F2’ and replaced the structure with the scale cabin bars under the dash. This leaves the space where the pilots legs and rudder pedals go. Dave was concerned with the strength of the main ‘box’ section in the nose and the attachment of the ‘box’ on the side walls with ‘F2’ removed. To fix this, some alloy rod was twitch in with wire and epoxy, and two alloy plate ‘posts’ for the side wall mounting points. Dave’s happy now. Scaling a Cub is a nice easy intro because they were incredibly simple aircraft. e.g. the scale joystick set only took one hour because it is a very simple mechanism. I have managed to find some excellent pictures from the internet, the most detailed are ‘screen shots’ from Flight Simulators. From these, and some basic blueprint pictures, I have managed to replicate the real cub quite accurately. Engines are both 2 cylinder 4 Cycle glow motors, a 1.20 for the 1/4 and a 3.00 for the 1/3. regards and Happy flying