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기술보고서

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타이틀	OPTIMAL PITCH THRUST-VECTOR ANGLE AND BENEFITS FOR ALL FLIGHT REGIMES
저자	Glenn B. Gilyard and Alexander Bolonkin
Keyword	Commercial aircraft; Efficiency; Lift-to-drag ratio; Optimization; Thrust vectoring
URL	http://www.dfrc.nasa.gov/DTRS/2000/PDF/H-2402.pdf
보고서번호	NASA-TM-2000-209021
발행년도	2000
출처	NASA Dryden Flight Research Center
ABSTRACT	The NASA Dryden Flight Research Center is exploring the optimum thrust-vector angle on aircraft. Simple aerodynamic performance models for various phases of aircraft flight are developed and optimization equations and algorithms are presented in this report. Results of optimal angles of thrust vectors and associated benefits for various flight regimes of aircraft (takeoff, climb, cruise, descent, final approach, and landing) are given. Results for a typical wide-body transport aircraft are also given. The benefits accruable for this class of aircraft are small, but the technique can be applied to other conventionally configured aircraft. The lower L/D aerodynamic characteristics of fighters generally would produce larger benefits than those produced for transport aircraft.