Chip was not immediately forthcoming with the lawnmower engine, but as I understood that such delicate equipment surgeries must not be rushed, I pressed on with my construction of the aircraft without hesitation or doubt. As it happens, an airplane isn't as difficult to build as one might imagine.
I kept it simple. The fuselage came together quite nicely, and in about half an hour. It consisted of four long 1x10s, nailed together into a long hollow box. I cut pieces to fit into the holes in the front and the back, and drilled a hole in the front piece so the drive shaft from the lawnmower engine could fit through. That's where I would attach the propeller.
Across the top, near the middle, I nailed another 1x10 which became the wings. My fixed-wing aircraft was nearly complete. Last, I nailed a smaller board across the back end, and stepped back. I pushed my giant, plastic, tape-wadded glasses higher up on my nose, brushed the sawdust out of my bowl-cut and stood proudly surveying my handiwork.
It looked vaguely like an airplane, and I was overjoyed with how well it had turned out. Here's an artists conception, and by that I mean here's a picture I just made in MS Paint.
Having done it once and since hindsight is 20/20, I feel I can safely point out a few mistakes which, should I build it again, I might consider re-thinking. I made no measurements whatsoever. In almost contemptuous disregard for Boyle's law, I didn't even bother to bevel the edges of the wing. I didn't take into account that the craft would need a fuel tank of some sort, and I didn't leave enough room for the lawnmower engine. I didn't add a rear vertical stabilizer, or rudder of any kind. Also it had no landing gear, and no seats. That's about it for mistakes, actually.
Not too bad.
The propeller was a little more challenging. I shaped it easily enough, but the hole in the middle was round and kept slipping on the test drive-shaft I'd whipped up. A round peg in a round hole. I whittled several iterations, tried wedging in bits of tree bark, bike tire rubber, wood shavings and everything else I could find before my dad came to my rescue and suggested I file a square hole and a square peg. That solved everything. My finished propeller was about eight inches across. Plenty.
So far Chips contributions had been fairly minimal, but I was convinced that in a day or two we'd be doing loops and barrel rolls around the property. My folks asked me to take a camera up with me to get some pictures of the house, and I happily agreed. They had no idea the depth of my conviction to actually follow through on the project and make the thing fly.
Previous: Part I
Next: Part III

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