Accession Number:

AD0296885

Title:

HERO SUPPORTING STUDIES

Descriptive Note:

Monthly progress rept. 1-31 Oct 1962

Corporate Author:

FRANKLIN INST PHILADELPHIA PA LABS FOR RESEARCH AND DEVELOPMENT

Personal Author(s):

Report Date:

1962-10-31

Pagination or Media Count:

37.0

Abstract:

Preliminary evaluations of protected MARK 7 MOD 0 ignition element plug assemblies indicate losses of 1.43 and 3 db respectively at 80 and 200 mc. These estimates are derived from analysing the component as an equivalent symmetrical T-network the parameters of the network are derived from measurements of open and short circuit input impedance. Though the resulting estimates appear high, the method warrants further study. A constant current functioning test of this element shows it to be more sensitive than its unprotected counterpart it requires only 7.8 amperes compared to 9.2 amperes at 0.1 msec for 50 functioning. Dynamic resistance which ranges from 55 ohms second at 3 amperes input to 956 ohmsecond at 10 amperes was determined also for the protected MARK 7 element. Its thermal time constant was found to be 11. 6 msec. Additional investigations into means for measuring power to the base of an arbitrary termination proceeded along the line of comparing differential power measurements to measurements derived from detecting the maximum and minimum voltages on a slotted line preceding the load. The latter technique, called the voltage min-max method, appears to be superior to any new technique tried to date.

Subject Categories:

  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE