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Systems Analysis and Structural Design of an Unpressurized Cargo Delivery VehicleThe International Space Station will require a continuous supply of replacement parts for ongoing maintenance and repair after the planned retirement of the Space Shuttle in 2010. These parts are existing line-replaceable items collectively called Orbital Replacement Units, and include heavy and oversized items such as Control Moment Gyroscopes and stowed radiator arrays originally intended for delivery aboard the Space Shuttle. Current resupply spacecraft have limited to no capability to deliver these external logistics. In support of NASA's Exploration Systems Architecture Study, a team at Langley Research Center designed an Unpressurized Cargo Delivery Vehicle to deliver bulk cargo to the Space Station. The Unpressurized Cargo Delivery Vehicle was required to deliver at least 13,200 lbs of cargo mounted on at least 18 Flight Releasable Attachment Mechanisms. The Crew Launch Vehicle design recommended in the Exploration Systems Architecture Study would be used to launch one annual resupply flight to the International Space Station. The baseline vehicle design developed here has a cargo capacity of 16,000 lbs mounted on up to 20 Flight Releasable Attachment Mechanisms. Major vehicle components are a 5.5m-diameter cargo module containing two detachable cargo pallets with the payload, a Service Module to provide propulsion and power, and an aerodynamic nose cone. To reduce cost and risk, the Service Module is identical to the one used for the Crew Exploration Vehicle design.
Document ID
Document Type
Conference Paper
Wu, K. Chauncey (NASA Langley Research Center Hampton, VA, United States)
Cruz, Jonathan N. (NASA Langley Research Center Hampton, VA, United States)
Antol, Jeffrey (NASA Langley Research Center Hampton, VA, United States)
Sasamoto, Washito A. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 23, 2013
Publication Date
April 26, 2007
Subject Category
Spacecraft Design, Testing and Performance
Report/Patent Number
AIAA Paper 2007-2329
Meeting Information
48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference(Honolulu, HI)
Distribution Limits
Work of the US Gov. Public Use Permitted.

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