Business jet approach noise abatement techniques - Flight test resultsOperational 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.
Document ID
19760048995
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Putnam, T. W. (NASA Flight Research Center Edwards, CA, United States)
Burcham, F. W. (NASA Flight Research Center Edwards, Calif., United States)