Accession Number:

ADA023206

Title:

The Optical Convolution Airspeed Indicator.

Descriptive Note:

Final rept. 18 Feb-18 Aug 75,

Corporate Author:

BOLT BERANEK AND NEWMAN INC CAMBRIDGE MASS

Personal Author(s):

Report Date:

1975-11-01

Pagination or Media Count:

67.0

Abstract:

The Optical convolution Velocimeter is a simple, inexpensive instrument for the measurement of airspeed. A shadowgraph of a hot turbulent wake is projected onto a grating and the reflected light fluctuates at a frequency proportional to the velocity of convection. The theory of the instrument is presented and its feasibility for airspeed measurement is discussed. The instrument has been tested in a low speed wind tunnel, on a light aircraft and compared with a Laser Velocimeter. Author

Subject Categories:

  • Flight Control and Instrumentation
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE