REPAIR OF LEAKS IN AN AEROSPACE ENVIRONMENT
Abstract
A study was made to determine the optimum method for the detection, location and repair of leaks in a manned space vehicle cabin. The hazards existing in the aerospace environment that could cause leaks were defined. The requirements for the system were established and an optimum system evolved from a trade off of many proposed techniques. The optimum system utilizes cold cathode ionization gauges mounted on the outside (i.e., vacuum or space side) of the cabin wall to detect leakage through the wall by sensing a minute increase in pressure. Separate warning indicators are mounted in back of the detectors, on the inside of the wall. Thus, when a leak occurs, the crew immediately knows the general location of the leak. Wall coverage area for each detector warning unit and system weight, as well as the minimum detectable leak can be varied to suit an individual vehicle. Location of small leaks and faulty seals is accomplished with He as a tracer gas. When a small jet of He is directed over the leak, the current in the detector drops. Larger leaks are pinpointed visually, and/or by the audible noise generated. A decompression warning system is provided to signal the presence of the very large punctures. Repair of seals is best accomplished by application to the junction of the component and cabin wall of a liquid sealant. Repair of small punctures is best obtained with a putty adhesive sealant. A self-brazing plug is optimum for the repair of larger punctures. For repair of large punctures in tight corners, a metal patch mechanically secured optimum.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1963
- Accession Number
- AD0403462
Entities
People
- D. J. Withey
Organizations
- General Electric