Accession Number:

AD0457356

Title:

ELECTRICAL TRANSMISSION COMPONENTS FOR A LARGE AEROSPACE ENVIRONMENTAL CHAMBER

Descriptive Note:

Corporate Author:

LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA MATERIALS SCIENCES LAB

Personal Author(s):

• Clauss, Francis J.

Report Date:

1965-02-01

Pagination or Media Count:

122.0

Abstract:

Secondary radiation in a large aerospace systems environmental chamber can be adequately simulated by an array of tungsten filament lamps mounted on a cage that surrounds the test vehicle. A total of 2528 lamps are required arranged on 68 circuits that are individually controlled for the purpose of simulating orbital fluctuations. Peak input to each of the circuits is approximately 75A at 43OV, and peak total input is 0.818mw. The simulator should be mounted so that it can tumble with the vehicle about the vehicles pitch axis. Variations in intensity of secondary radiation around the circumference of the vehicle can be programmed electrically so that the simulator need not rotate about the roll axis of the test vehicle. Sliding electrical contacts are preferred to flexible cables or rotary transformers for transmitting power to the simulator, and separate slip rings can be provided for each of the circuits. Self-lubricating powder metallurgy composites of silver, copper, and molybdenum disulfide have demonstrated satisfactory performance in ultrahigh vacuum for use on slip rings providing power to the secondary radiation simulator.

Descriptors:

• *ALBEDO
• *ALTITUDE CHAMBERS
• ANTISEIZE COMPOUNDS
• BRUSHES
• COPPER
• ELECTRIC CABLES
• ELECTRICAL RESISTANCE
• GRAPHITED MATERIALS
• INCANDESCENT LAMPS
• LUBRICANTS
• MOLYBDENUM
• MOLYBDENUM COMPOUNDS
• NOISE
• SECONDARY EMISSION
• SILVER
• SIMULATION
• SIMULATORS
• SLIDING CONTACTS
• SLIP RINGS
• SOLAR RADIATION
• SPACE ENVIRONMENTS
• SULFIDES
• TEST FACILITIES
• VACUUM
• VACUUM APPARATUS

Subject Categories:

• Atmospheric Physics
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE