| УДК |
Аннотация: This report describes trials of hydrogen-filled balloons, tethered to the ground, and used to measure the speed and direction of light air currents (0-5 miles per hour) near or around experimental fires. The hypothesis was that when a tethered balloon is displaced by a certain wind speed, the angle between the tether and the vertical ("angle of lean" of the balloon) can be correlated with the speed of the wind. This hypothesis was investigated at the Petawawa Forest Experiment Station at Chalk River, Ontario, in the summer of 1962
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)