Science: Uncle Igor's Dream

Even his best friends called it "Igor's Nightmare." A clutter of steel tubing and odd gears, topped by a giant three-bladed rotor, the machine looked like the handiwork of an imaginative child playing with an Erector set. Yet its middle-aged creator clearly had confidence in his contraption. Dressed in a dark business suit and a fedora, he climbed easily into the open cockpit and coaxed the 75-h.p. engine to life. As the rotor blades clattered noisily overhead, the machine lifted a few feet off the ground and hovered there for ten full seconds before...

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