A preliminary experimental investigation is being conducted to de¬termine the feasibility of preventing rain from impinging on aircraft windshields by means of high-velocity jet-air blast.nThe results indicate that rain deflection by jet blast appears feasible, for flight speeds comparable with landing and take-off speeds of interceptor-type jet aircraft; however, attainment of good visibility through the mist generated by raindrop breakup presents a problem. For the simulated windshield and the lower windshield angles used in the investigation, air-flow rates of the order of 3.3 pounds per minute of unheated air per inch of windshield span were required for adequate rain deflection at a free-stream velocity of 135 miles per hour.nA method has been devised whereby it is possible to produce large-diameter water drops (1000 to 1500 u) in a moving air stream, without breakup, at speeds in excess of 175 miles per hour.
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