Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781724223326
Total Pages : 32 pages
Book Rating : 4.21/5 ( download)
Book Synopsis A Suspended Anemometer System for Measuring True Airspeed on Low-Speed Airplanes by : National Aeronautics and Space Administration (NASA)
Download or read book A Suspended Anemometer System for Measuring True Airspeed on Low-Speed Airplanes written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A suspended anemometer system for calibrating pitot-static systems on low speed research airplanes is described. The anemometer measures true airspeed when suspended beneath the airplane on a long cable in regions of undisturbed air. The electrical output of the propeller driven tachometer is a sine wave, the frequency of which is proportional to true airspeed. The anemometer measures true airspeed over a range from 20 to 60 m/sec at altitudes to 3000 m, with an accuracy of + or - 0.5 percent of full scale range. This accuracy is exclusive of errors in the recording system. The stability of the suspended system was investigated and was found adequate in the airspeed range. For the purpose of determining the location of the anemometer relative to the airplane, a method is given for calculating the shape assumed by the deployed cable. Kershner, D. D. Langley Research Center NASA-TN-D-8523, L-11269 RTOP 505-07-41-06