Accession Number:

AD0756478

Title:

Duration and Unusual Extremes of Cold. Supplement I

Descriptive Note:

Technical Report

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA HANSCOM AFB United States

Personal Author(s):

Report Date:

1972-12-01

Pagination or Media Count:

14.0

Abstract:

The study supplements Duration and Unusual Extremes of Cold, AD-710 611 dated 26 June 1970. It presents revised values of low-temperature extremes that correspond to recently modified guidance on acceptable risk. A low temperature of -50 degrees F corresponds to the value that equipment will encounter with a 50 percent probability when it is exposed in small record-making cold basins of Siberia during the coldest month. The 50 percent probability level is now applicable to operation of equipment. Associated with this extreme is a 1-month cycle of temperatures that are characteristic of the complete thermal regime in which a minimum of -50 degrees F is imbedded. When not in operation, equipment must be able to withstand temperatures in the -81 to -88 degree F range for 1 hour, and below -29 degrees F for 32 days.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE