Variable Geometry Fuel Tank.
Abstract
This report describes the development work for construction of three prototypes of a variable geometry (VG) external fuel tank for use on high performance aircraft in operation and development. A unique feature of the tank is that it contracts as fuel is transferred, continuously reducing drag. Positive expulsion of the fuel eliminates potentially explosive ullage, center of gravity shifting, and sloshing. The prototype tanks are designed for the swivel pylongs of the F-111 as a test-bed aircraft. With a capacity of 600 gallons, they will contract from a maximum diameter of 32 inches to about 12 inches. The structure is a combination of rigid and elastomeric panels, positively contrained and controlled by an activation mechanism. The report contains a description of the design elements, of the structural analysis, of the experimental evaluation, and of the construction methods. Difficulties encountered are discussed and further potential improvements of the VG fuel tank system are suggested.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1971
- Accession Number
- AD0901911
Entities
People
- Boris Levenetz