NACA-TN-747

Propeller rotation noise due to torque and thrust

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:59:33Z
date available	2017-09-04T17:59:33Z
date copyright	01/01/1940
date issued	1940
identifier other	FUONEEAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/182682
description abstract	Sound pressure of the first four harmonics of rotation from a full-scale two-blade propeller were measured and are compared with values calculated from theory. The comparison is made (1) for the space distribution with constant tip speed and (2) for fixed space angles with variable tip speed. A relation for rotation noise from an element of radius developed by Gutin is given showing the effect of number of blades on the rotation noise.
language	English
title	NACA-TN-747	num
title	Propeller rotation noise due to torque and thrust	en
type	standard
page	19
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1940
contenttype	fulltext