Composite Boss Technology

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 36134
Amount: $78,883.00
Phase: Phase I
Program: SBIR
Awards Year: 1997
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Wilson Composite Group, Inc.
6611 Folsom-Auburn Rd., Ste. C, Folsom, CA, 95630
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Brian A. Wilson
 (916) 989-4812
Business Contact
Phone: () -
Research Institution
Composite tank technology has now been developed to contain liquid hydrogen and liquid oxygen without use of a liner. This advancement will significantly reduce the inert component of propulsion system weight. The thrust to weight ratio performance factor and the pressure X volume/weight pressure vessel performancce measurement will both be increased as a result of this development. The metallic boss fitting/ closure assembly now becomes the critical weight component in a cryogenic tank assembly. This Phase I SBIR proposal has as its goal the adaptation of composite materials in place of metals in tank boss structure. In addition to structural loads, the boss assembly is designed to provide an effective seal arrangement as the primary inlet/outlet/vent system for cryogenic tankage. An innovative concept will also be evaluated for the potential integration of a composite boss design into the composite dome structure of the vessel. Designs of composite bosses will be tailored to fit tanks from 4' up to 12" diameter. This will effectively cover the size range of cryogenic tanks used as research and sub-scale assemblies for currently emerging systems, such as the Air Force Expendable Launch Vehicle and the Integrated High Payoff Rocket Propulsion Technology (IHPRPT) program. An 18" diameter composite tank will be filament wound with integral bosses and layed up closures will be fabricated and assembled onto the tank. IM7/977-2 materials will be used based on successful demonstration in the LH2 program. Surface treatment of the composite structure may be required to meet the requirements for cryogenic sealing techniques being submitted under a parallel SBIR proposal.

* information listed above is at the time of submission.

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