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Watty's blog
Posted by Watty | Jan 03, 2013 @ 09:26 PM | 2,022 Views
My first blog entry describes a method to make thin Depron sheet similar to Durobatics from readily available 1 mm Depron sheet.

Background:

In late 2007, I designed a small aileron, elevator, and throttle airplane around the radio system from a Park Zone Minium Cessna 210, and a more powerful GWJ 7mm Gearbox w/SS Blue motor from Bob Selman’s BSD Micro RC. The fuselage was built up from 1 mm Depron and a few pieces of balsa and plywood in high stress areas. The symmetrical airfoil wing consisted of a balsa root rib, tip rib, and a balsa spar covered with a single piece of 1 mm Depron wrapped around the leading edge.

The model flew satisfactorily and would perform basic aerobatics, but it was clear the wing was much stronger and heavier than needed, thus performance suffered. So, I decided to see if I could lighten the design by thinning the 1 mm Depron sheet wherever possible. Most of the weight in the 1 mm Depron sheet is in the skins, so removing one of the skins reduces weight significantly. I developed a simple method to machine and sand the 1 mm Depron to a thickness of about 0.025 inches. I used this material to build the next version of the plane, called the TinE Dancer V2. Performance was much improved due to the lighter weight. This plane is shown in Photo 1, alongside the PZ Cessna.

I received many positive comments about the plane, its flying characteristics, construction, and materials I made it from. More information and a video can be found...Continue Reading