INVESTIGATION OF CLOSE TOLERANCE TIME DELAY INITIATORS.
Abstract
The report describes the results of a program to establish the feasibility of using Bimetal wire as the main component for the development of a close tolerance delay element for initiators and for use in systems employing mild detonating fuze (MDF) that would be capable of operation after exposure to extremes of temperatures as experienced in aerospace vehicles. Standard pyrotechnic delay elements are produced with a time tolerance, of + or - 20% over the temperature range of -65 to 160 F. To improve this time tolerance, a new material, has been introduced into the design of delay elements. This detailed study documents the design, fabrication, development and testing of a fuze wire delay element that is compatible with the standard PAD miniature delay initiators and with the mild detonating fuze systems. At standard temperature, there were no ignition problems when standard primers were used. However, the tests conducted with the high temperature primer at high temperatures indicated a need for a primer or detonator having temperature capabilities of -100 to +500 F, low brisance, and long flash for ignition purposes. The results of the tests conducted indicate that the desired time delay performance of + or - 5% over the temperature range of -100 to +400 F can be obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1967
- Accession Number
- AD0819911
Entities
People
- William R. Peterson