Science: Model Record

The mechanical-minded young and not-so-young who fly model airplanes in tethered circles have a new mark to fly at. Last week Sherman Holt, 14, of Fayetteville, N.C. kept a model plane in the air for 8 hrs. 31 min. and 50 sec., leaving his nearest competitor more than seven hours behind.

Farm Boy Holt built his first (5ยข) model at the age of six. Since then he has been working toward bigger projects. A few weeks ago he had the idea of refueling his latest model through a plastic tube running up the control...

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