Word: hatlestad
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...night last week the boy, Harold Hatlestad, Minneapolis high-school student, appeared with 30 other youngsters and 30 model machines at the University's Chemistry Auditorium. It was the annual Originality Contest (sponsored by Professor Akerman) of the Twin City Boys' Air- plane Model Makers Club. There were designs ranging from a maple leaf type offered by Clarence Maihori, a Japanese, to a futuristic conception of 21st Century transport submitted by Robert Hillberg. Harold Hatlestad's rotor ship took first place...
...Hatlestad model has a conventional propeller, but in place of wings there are freely spinning horizontal rotors 14 in. long and 2 in. in diameter. The rotor is composed of two semicircular vanes on an axis-in cross section shaped like the letter S. As the plane moves forward, air pressure causes the rotor to revolve backward. That action, combined with the forward movement, produces low pressure on top of the rotor, increased pressure (lift) on the bottom. If the motor should quit the rotor continues to spin in descent, the lift force stretching the plane's course into...
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