Operational techniques for reducing approach noise from business jet aircraft were evaluated in flight by measuring the noise generated by five such aircraft during modified approaches. Approaches with 4-deg glide slopes were approximately 4.0 EPNdB quieter than approaches with standard 3-deg glide slopes. Noise reductions for low-drag 3-deg approaches varied widely among the airplanes tested; the fleet-weighted reduction was 8.5 EPNdB. Two-segment approaches resulted in noise reductions of 7.0 EPNdB to 8.5 EPNdB 3 nautical miles and 5 nautical miles from touchdown. Pilot workload increased progressively for the 4-deg, low-drag 3-deg, and two-segment approach.


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    Title :

    Business jet approach noise abatement techniques - Flight test results


    Contributors:

    Conference:

    Business Aircraft Meeting ; 1976 ; Wichita, Kan.


    Publication date :

    1976-04-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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