Radius of Action: Half the range of an aeroplane in still air.
Rain: A precipitation from clouds taking the form of drops of water.
Rain Gauge: An instrument to measure rainfall.
Effect of Wind on Radius of Action.-Not only ~' is the direction of flight altered by the wind but also the radius of action from a standpoint of gasoline capacity is altered. In the above machine the gasoline capacity is sufficient for 3½ hr.
It had a huge radius of action and the pilot never felt under constant pressure to figure out just where he was and to plot a hurried course home, with its attendant distraction.
the into-wind radius of action will be reduced while the downwind radius will be increased. The wind velocity is going to have a greater effect on an aircraft whose Vbg is 45 knots than on another whose Vbg is 65 knots.
 See also: Pilot, Speed, Flight, Wing, Power
  
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