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Should Large Business Jets Have Four Under the Wing?
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English
Abstract
A preliminary design study is conducted of three very long range business jets. One has two engines mounted on the rear fuselage, like most existing business jets. The other two have two or four engines mounted under the wing.
The paper shows that the design takeoff weight of very long range business jets is extremely sensitive to three parameters: design range, design sfc and design L/D. Depending on the design range and wing loading, these airplanes are also critical in terms of available fuel volume.
The paper gives an analysis of the pros and cons of either configuration. A cost comparison in terms of DOC (Direct Operating Cost) is also given. When considering both cost and takeoff weight, the 2-engines-under-the-wing design is shown to come out on top.
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Citation
Roskam, J., "Should Large Business Jets Have Four Under the Wing?," SAE Technical Paper 931256, 1993, https://doi.org/10.4271/931256.Also In
References
- George F. The Newest Gulfstream Business & Commercial Aviation October 1992
- Hughes D. Nimble Regional Jet Stable In All Regimes Aviation Week & Space Technology September 7 1992
- Mecham M. Gulfstream V Launch Includes BR710 Engine Aviation Week & Space; Technology September 14 1992
- Falcon 9000 Among New Aircraft Business & Commercial Aviation October 1992
- Roskam Jan Airplane Design, Parts I through VIII, 1990 Roskam Aviation and Engineering Corporation 2550 Riley Road, Ottawa, Kansas, 66067