Flight Testing at Edwards AFB in the 1950s

A Comparison of L-Band and C- Band Multipath Propagation at Edwards AFB

This paper summarizes Land C-band propagation data based on multiple transmit and receive antennas in the flight-line environment at Edwards AFB. The data show that for this particular environment, C-band propagation exhibits much less delay spread than L-band propagation. But C-band propagation is more susceptible to complete outages due to shadowing. The main contributing factors to these con...

Testing the Edwards hypothesis in spin systems under tapping dynamics

The Edwards hypothesis of ergodicity of blocked configurations for gently tapped granular materials is tested for abstract models of spin systems on random graphs and spin chains with kinetic constraints. The tapping dynamics is modeled by considering two distinct mechanisms of energy injection: thermal and random tapping. We find that ergodicity depends upon the tapping procedure (i.e. the way...

Pre-Garrison GeoBase at Little Rock AFB, Arkansas

Pre-Garrison GeoBase at Little Rock AFB, Arkansas Track: Defense and Intelligence Author(s): Tom Murphy Little Rock AFB, Arkansas was presented with two opportunities—the need for a base comprehensive plan (BCP) for development as well as the installation of new communications physical plan. Base leadership recognized the importance of up-to-date, accurate geospatial information to support thes...

Computational chemistry in the 1950s.

Progress in Flaps Down Flight Reynolds Number Testing Techniques at the NTF

A series of NASA/Boeing cooperative low speed wind tunnel tests was conducted in the National Transonic Facility (NTF) between 2003 and 2004 using a semi-span high lift model representative of the 777-200 aircraft. The objective of this work was to develop the capability to acquire high quality, low speed (flaps down) wind tunnel data at up to flight Reynolds numbers in a facility originally op...