INITIAL PUMPDOWN AND LEAK CHECK OF THE AEROSPACE ENVIRONMENTAL CHAMBER (MARK I)
Technical rept. 21 Sep-26 Oct 1965
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
Pagination or Media Count:
Presented are the planning, procedures, and results of the first complete pumpdown and leak check of the Aerospace Environmental Chamber Mark I . The objective of the pumpdown and leak check was to reduce the total leakage of the 106,000-cu ft. vacuum chamber to the low 0.001 std ccsec range. The total leakage was reduced from 5000 std ccsec to 0.002 std ccsec in 26 normal work days, 50 hr of which was devoted to chamber operational leak detection. The procedures and techniques of vacuum system analysis and leak detection used in this operation are described, as are the modifications and additions to the chamber which were required to accomplish the project objective. The results of the operation proved the adequacy of the techniques used, and demonstrated the capability of reducing chamber leakage to much less than 0.002 std ccsec.
- Test Facilities, Equipment and Methods
- Fluid Mechanics