An algorithm based on the energy state method is derived for calculating optimum trajectories with a range constraint. The derivation of the algorithm further assumes that each optimum profile consists of at most three segments, namely, increasing (climb), constant (cruise) and decreasing (descent) segments of energy. This assumption yields significant advantages in the computation of the optimum trajectories. The algorithm is used to compute minimum fuel, minimum time, and minimum direct operating cost trajectories for a currently in service CTOL short-haul aircraft. Minimum fuel trajectories also are computed under conditions of wind velocities and shears of the type encountered in jet streams. Important differences in these trajectories from the no-wind case are noted.

  • Availability:
  • Corporate Authors:

    American Institute of Aeronautics and Astronautics

    1290 Avenue of the Americas
    New York, NY  United States  10019
  • Authors:
    • Barman, J F
    • Erzberger, H
  • Publication Date: 1976-10

Media Info

  • Pagination: n.p.
  • Serial:
    • Journal of Aircraft
    • Volume: 13
    • Issue Number: 10
    • Publisher: American Institute of Aeronautics and Astronautics
    • ISSN: 0021-8669

Subject/Index Terms

Filing Info

  • Accession Number: 00172793
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jun 28 1978 12:00AM