Preliminary analysis of the span-distributed-load concept for cargo aircraft design
A simplified computer analysis of the span-distributed-load airplane (in which payload is placed within the wing structure) has shown that the span-distributed-load concept has high potential for application to future air cargo transport design. Significant increases in payload fraction over current wide-bodied freighters are shown for gross weights in excess of 0.5 Gg (1,000,000 lb). A cruise-matching calculation shows that the trend toward higher aspect ratio improves overall efficiency; that is, less thrust and fuel are required. The optimal aspect ratio probably is not determined by structural limitations. Terminal-area constraints and increasing design-payload density, however, tend to limit aspect ratio.
- Research Organization:
- National Aeronautics and Space Administration, Langley Station, Va. (USA). Langley Research Center
- OSTI ID:
- 7240553
- Report Number(s):
- N-76-13065; NASA-TM-X-3319; L-10473
- Country of Publication:
- United States
- Language:
- English
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AIRCRAFT
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EFFICIENCY
ENERGY CONSUMPTION
FUEL CONSUMPTION
MATHEMATICAL MODELS
STATIC LOADS