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Flight tests of Viking parachute system in three Mach number regimes. 1: Vehicle description, test operations, and performanceFlight qualifications for parachutes were tested on full-scale simulated Viking spacecraft at entry conditions for the Viking 1975 mission to Mars. The vehicle was carried to an altitude of 36.6 km for the supersonic and transonic tests by a 980.000 cu m balloon. The vehicles were released and propelled to test conditions with rocket engines. A 117,940 cu m balloon carried the test vehicle to an altitude of 27.5 km and the conditions for the subsonic tests were achieved in free fall. Aeroshell separation occurred on all test vehicles from 8 to 14 seconds after parachute deployment. This report describes: (1) the test vehicle; (2) methods used to insure that the test conditions were achieved; and (3) the balloon system design and operations. The report also presents the performance data from onboard and ground based instruments and the results from a statistical trajectory program which gives a continuous history of test-vehicle motions.
Document ID
19750002075
Document Type
Other - NASA Technical Note (TN)
Authors
Lundstrom, R. R. (NASA Langley Research Center Hampton, VA, United States)
Raper, J. L. (NASA Langley Research Center Hampton, VA, United States)
Bendura, R. J. (NASA Langley Research Center Hampton, VA, United States)
Shields, E. W. (LTV Aerospace Corp. Hampton, Va., United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1974
Subject Category
SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Report/Patent Number
L-9536
NASA-TN-D-7692
Funding Number(s)
PROJECT: RTOP 815-20-09-03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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