Accession Number:

AD0730157

Title:

The Determination of a Gunship Trajectory Under the Influence of a Steady Wind.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1971-06-01

Pagination or Media Count:

87.0

Abstract:

The principle reason for the existence of the gunship results from the need to maintain gun to target alignment for an extended period of flight time. The determination of a closed loop trajectory of the initial slant range from target to aircraft for a given steady, horizontal wind velocity and an equation to represent that closed loop are the primary products of this report. The equations of motion of the aircraft are developed then linearized about a nominal, no wind, solution. The important assumptions are the wind encountered has a constant velocity, the aircraft maintains a constant altitude and airspeed and the yaw angle is assumed to be small at all times. Finally, an existing but fairly recent approach guidance scheme was modified for this particular problem to guide the aircraft to the initial offset slant range for a given wind velocity. Upon reaching this point, the aircraft will be in the proper bank angle configuration eliminating the necessity for any violent maneuvering to attain initial gun alignment. Author

Subject Categories:

  • Transport Aircraft
  • Fire Control and Bombing Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE