Accession Number:

ADA099371

Title:

Modified Gas Valve for Improved Balloon Descent Control.

Descriptive Note:

Final rept.,

Corporate Author:

AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

Report Date:

1980-10-30

Pagination or Media Count:

26.0

Abstract:

The ability to control balloon descent rates has been improved through use of a modified gas valve which has a range of openings. The descent rates obtained with this valve are more constant than those obtainable with the standard gas valve. Atmospheric temperature lapse rate and other thermal and aerodynamic influences are unquantifiable factors affecting balloon vertical motion, but are better compensated for when use is made of a variable opening gas valve. Even with this valve, slow descents on the order of 200 fpm or less will have oscillations with short periods of time when ascents and leveling off will occur. Author

Subject Categories:

  • Lighter-than-air Aircraft
  • Pumps, Filters, Pipes, Tubing, Fittings and Valves

Distribution Statement:

APPROVED FOR PUBLIC RELEASE