THE HONGKONG TELEGRAPH SATURDAY, JULY 3, 19
A sub-zara mist fills the main hangar of the U.S. Air Proving Ground Command's all-weather laboratory during a test of fully-equipped aircraft at a temperature of minus 70 degrees. The plane in the background is a glant B-29
At left is a winterized helicopter.
bombar.
THE U.S. ARMY Signal Corps has its own climatic laboratory at Fort Monmouth for cold-weather tests. Above, dry ice la put In a chamber of super-cooled vapour
.AS THE temperature drops to minus 40 degrees, snow crystals begin to form. The snow will be used with a man-made
wind to simulate a blizzard.
A TECHNICIAN checks the moving parts of a tank after a below-zero test in the climatic hangar. The hose at right carried the intense cold into the motor to test the effects of prolonged frigid temperatures on metal during Polar operations. New greases and oils were also checked at the same time.
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MECHANICS work on a glant C-54 transport during U.S. Air Force winter manoeuvres in Alaska. It is there that aircraft get final operational tests to determine their cold weather limitations and capabilities.
OPERATION FRIGID
N the perimeter of the frozen top world, in temperatures down to 65 de- grees below zero, the U.S. Air Force is subjecting a squadron of P-80 jet planes to the worst kind of all-weather flying. At the same time, two of the win- terised jets have been sent to the Air Proving Ground, Elgin Field, Florida. There, while a warm sun beats down outside, the planes will be tested in the giant climatic hangar which simulates Arctic weather, more severe than that encountered in Alaska. The jets already carry many features teated and proved practical in the wenther "test tube."
Capable of producing snow, fog, rain, high and low relative humidity, the hangar has ก temperature range from 70 de- grees below. zero to 165 degrees Fahrenheit. Localised wind storms up to 100 m.p.h. In combination with snow, sloot or rain can also be produced.. Five B-20s can be tested simul- taneously with a collection of helicopters, trucks, tanks and .clothing.
i
A PHOTOGRAPHER takes his camera into the hangar
to check whether it will operate at minus 40 dégroos,
using a newly-developed lubricant. Formerly, shutters would not work in extreme cold,
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