Accession Number : AD0427939


Title :   HEIGHT VELOCITY DIAGRAM FLIGHT TEST PROJECT ON THE BELL 47G3B HELICOPTER


Descriptive Note : Conference Paper


Corporate Author : FEDERAL AVIATION AGENCY WASHINGTON DC WASHINGTON DC United States


Personal Author(s) : SANFORD,W ; Hanley,W J ; De Vore,Gilbert


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/427939.pdf


Report Date : 03 May 1963


Pagination or Media Count : 52


Abstract : The variation of the Helicopter Height-velocity Diagram with altitude was determined for the Bell 47G-3B aircraft. The FAA analysis of the data resulted in a definite set of empirical mathematical equations. These empirical equations are known as the De Vore equations. Height-Velocity Diagram flight test data recorded at one density altitude can be used to compute the Height-Velocity Envelope at any other density altitude using the De Vore equations. These tests produced a large amount of high quality flight test time history data recorded on instrumentation installed in the test helicopter and on instrumentation installed on the ground at the test site. The Langley Laboratory of NASA is presently in the process of analyzing these data to assist them in producing a mathematical model of the Height Velocity Diagram for autorotation landings for a helicopter using known configuration parameters.


Descriptors :   HELICOPTERS , AIRCRAFT LANDINGS , AVIATION SAFETY , VELOCITY , HEIGHT FINDING , LANDING , CLIMBING


Subject Categories : Helicopters


Distribution Statement : APPROVED FOR PUBLIC RELEASE