(HP97) A ClosedForm Solution for Noise Contours

01032019, 04:18 PM
(This post was last modified: 01032019 04:36 PM by SlideRule.)
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(HP97) A ClosedForm Solution for Noise Contours
An extract of the SUMMARY from A ClosedForm Solution for Noise Contours, Elwood C. Stewart, NASA Technical Paper 1432, 1979.
… In this report is described an analytical approach for generating noise contours that overcomes the difficulties of existing programs. Although many noisecontour programs are available, they require large computers and a sustained major effort for use, are complex and slow, and are generally not desirable for interactive use for online pilotedsimulator use. The method developed here is valid for arbitrarily complex paths and reveals the importance of various factors that influence contour shape and size. The calculations are simple enough to be implemented on a small, handheld programmable calculator, and a program for the HP67 calculator is illustrated. The method is fast, simple, and gives the area, the contour, and its extremities for arbitrary flight paths for both takeoffs and landings. … thorough & interesting read BEST! SlideRule 

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