Articles with tag: "rain"

(Note: figures do not appear in the summaries below)

  1. NACA-RM-E55E17a

    "rain deflection by jet blast appears feasible for flight speeds"

    "Preliminary Data on Rain Deflection from Aircraft Windshields by Means of High Velocity Jet-Air Blast" 1

    Figure 6. Raindrop breakup and deflection achieved with single air jet operating at 10° included angle between jet and windshield. Air-jet diameter, 1/8 inch; air—jet total pressure, 52 pounds per square inch; jet discharge angle, 60°; windshield angle, 40°; free-stream velocity, 120 miles per hour.

    Abstract

    A preliminary experimental investigation is being conducted to determine the feasibility of preventing rain from impinging on aircraft windshields by means of high-velocity jet-air blast.

    The 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.

    A method has been devised whereby it is possible to produce large-diameter …

    read more