Flight Information and Experimental Results of Inflatable Falling Sphere System for Measuring Upper Air Density

Item

Title
Flight Information and Experimental Results of Inflatable Falling Sphere System for Measuring Upper Air Density
Date
1961
Index Abstract
Coming Soon
Photo Quality
Incomplete
Report Number
AFCRL 685
Creator
Faucher, G. A.
Procunier, R. W.
Stark, C. N.
Corporate Author
Air Force Cambridge Research Laboratories
Extent
29
Identifier
AD0265172
Distribution Classification
1
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Abstract
A Nike-Cajun rocket firing for the purpose of ejecting an inflatable sphere with accelerometers and telemetry at 300,000 ft is described. The firing was to measure the drag acceleration of the sphere above 300,000 ft for use in calculating air-density measurements. The drag acceleration is measured with three linear accelerometers which measure acceleration along three mutually perpendicular axes from within the sphere. The density calculated from this flight was 1.46 x 10 to the -9th power slugs/cubic ft at 107 km. A secondary objective was to obtain an engineering evaluation of a system to eject and inflate a 9-ft diameter sphere. Flight records indicated that the sphere was ejected 76 sec (300,000 ft) after launching. The rocket was fired shortly after sunset when the sky had darkened and the earth's shadow extended to about 250,000 ft. The sphere was observed for approximately 3 minutes. The sphere attained an altitude of 450,000 ft. Telemetry data was recorded for 12 minutes.
Report Availability
Full text available by request
Date Issued
1961-08
Provenance
IIT
Type
report
Format
29 pages ; 28 cm.