Identifier: belltelephonemag4344amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
elerationsencountered during missile launch andre-entry. The rocket-propelled sleds reachvelocities up to Mach 2.3, approximately2500 feet per second, which allows test-ing with high velocity impacts into vari-ous targets including wood, earth, metal,water, and concrete. Of the two centrifuges, the older onecan carry test items weighing up to10,000 pounds to simulate the loads im-posed on weapon components and sys-tems by the acceleration of missiles orjet aircraft. The centrifuge arm, with aradius of 35 feet, can subject a 1,000-pound object to 240 times the force ofgravity. The newer centrifuge, recentlyinstalled, is the largest in this country interms of dynamic load capacity. It willbe used in combined environmental tests— both acceleration and vibration — tosimulate forces of rocket launch, re-entryand other field environments. ^ To simulate thermal environments, such as those a missile encounters when it re-enters the earths atmosphere, components are subjected to rapidly 38
Text Appearing After Image:
Sandiii men install hydrodynamic gauge to measure nuclear explosion shock wave in ProjectShoal experiment to improve ways of distinguishing earthquakes from underground explosions. changing extremes of temperature. Testitems may be placed in the radiant heatfaciHty, which can reach temperatures ashigh as 5,000° F. in seconds. Or they maybe placed in the large climatic test cham-ber where temperatures can range from100 degrees below zero to 250 degreesabove. Altitudes ranging from 2,500 feetbelow sea level to 100,000 feet above canalso be simulated. Temperature shockscan be imposed on a test sample by rap-idly moving it from one compartment inthe climatic environmental test chamber(which may be cooled to a sub-zero tem-perature) to the other compartment(which may be heated). Equally severe environmental tests tosimulate all possible conditions a weaponsystem might encounter are performed inother facilities in Area III. Test itemsmay be subjected to acoustic, random-and complex-wave vi

Note About Images