| Performance of a Low-Density Hypersonic Magneto-Aerodynamic Facility |
20 OCT 2003 |
21 pages |
| Authors:
R. Kimmel; j. hayes; C. Tyler; J. S. Shang; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
 | A hypersonic, weakly ionized gas experimental facility has been successfully developed for magnetoaerodynamics basic research. The weakly ionized air is generated by a combination of direct current discharge, radio frequency discharge, and a combination of both in a blow-down, open jet, Mach 5 flow channel. The plasma field is characterized by electron temperatures around 10,000 K, and electron number density up to 2x10(exp 12) cu cm. The magnetic field is ... |
|
| nondestructive thickness measurement of fiber reinforced plastic/frp/ using ultrasonic techniques |
FEB 78 |
|
| Authors:
j. hayes; k. fowler; g. elfbaum; k. fox; b. mel
|
 | the authors describe a pulse echo ultrasound instrument which can be used for making in-plant measurements. they also discuss factors affecting measurement accuracy and reliability such as surface roughness, and filling in tanks. the effects of internal structure of frp are also reviewed. the potential of extending measurement to infer glass to resin ratio is assessed. (ntiac) |
|
| Human Factors Problems of the Command, Control, and Communication Process in the 1990's. |
14 JUL 1976 |
|
| Authors:
Richard Hayes; J. Brownell; j. hayes; B. Spector; CACI INC-FEDERAL ARLINGTON VA
|
| This report describes research completed on the first four tasks of the study. Two quite different descriptive structures are built that will interact in subsequent tasks to provide the study outcome. First, a set of human factors activities involved in the C(3) process is enumerated and the determining forces controlling these human factors are elaborated. Second, a list of variables constituting the set of relevant dimensions of future (1990) environments ... |
|
| development of nondestructive test device for evaluation of 3/4 inch thick polyurethane spray-on foam insulation (sofi) on the saturn s-2 stage |
MAY 69 |
|
| Authors:
j. hayes
|
| this report describes the technical survey, reseach development, and applied engineering effort performed to develop a nondestructive test for evaluation of the cryogenic insulation used on the saturn s-ii stage. several methods of testing were studied but the sonic impedance method was determined to be the most favorable. since the sonic impedance method was capable of locating defects in the insualtion smaller than specification limitations, it is recommended for inspecting ... |
|
Reports by Author
