My goal for this project was to use a micro-sized RC model of the C-47 transport plane to tow a similarly-scaled down replica of the WACO CG-4A combat glider. I've been flying larger models of these iconic WWII airplanes for several years. Shrinking things down to micro-scale introduced several new challenges. I was able to overcome some of these hurdles, but continue to stumble over others.
In part one of this series, I examined Flyzone's new micro C-47. My evaluation covered its performance as a standalone model as well as its potential as a glider tug. I thought that the overall flying qualities of the C-47 were pretty solid. However, I added static flaps, a tow hitch, and longer landing gear before attempting to tow with it.
This time around, I will talk about how I built the tiny CG-4A gliders, explain the wild flight tests, and review the overall successes and failures of this project.
Micro Glider – Take One
My calculations indicated that a CG-4A in the same scale as the Flyzone C-47 (about 1/50) would have a wingspan of just over 20 inches. I scaled down my plans for a 65-inch WACO glider, printed a few templates and started building.
Foam is my preferred material for prototyping because it is so easy to work with. That is especially true when dealing with boxy shapes like the CG-4A. The fuselage is made of .75"-thick blue foam from a home-improvement store. Two layers side-by-side were the perfect width, so I made right and left halves. Using a sanding drum in my Dremel tool, I hollowed out the inner side of each half to create space for the radio gear.
Whenever I crash one of my store-bought micro models, I always make sure to salvage as many parts as I can. I pull the electronics, motor, carbon fiber bracing, control linkages…everything. The resulting stash of tiny parts always comes in handy for projects such as this. My prototype WACO used many of these bits, including a brick (integrated 4-channel receiver, brushed ESC, and two servos) from an old Flyzone Playmate.