Method for locating the resultant of wind effects on tethered ai

Details Method for locating the resultant of wind effects on tethered ai Method for locating the resultant of wind effects on tethered ai

1994-03-08

1996-07-09

Merritt, Karen B.

Aeronautics and astronautics

Kites

A63H 2708, B64C 3106

Patent

active

055336949

ABSTRACT:
A method for the determination of the location of the line-of-action of the resultant of the wind forces on a tethered aircraft is disclosed. The location is referenced to a line-segment that is referenced in turn to the aircraft structure. The line-segment is from the point of attachment of the tether to the center-of-gravity of the aircraft. The location is the distance along the line-segment from the center-of-gravity to the point of intersection of the resultant and the line-segment and the angle between them. The method includes the measurement of the length of the line-segment and the measurement of the aircraft weight. While the aircraft flys in force equilibrium, measurements of the tether-tension, of the inclination of the tether, and of the slope of the line-segment are recorded. The measurements provide locations of a plurality of coordinate points on the line-of-action. The resultant that is located by the points is marked on or within the structure. The location is a property of the tethered aircraft. Once marked, whatever the angle of attack, the location remains fixed, however the site of the towing-point or the weight distribution is altered.

REFERENCES:
patent: 2751172 (1956-06-01), Rogallo et al.
patent: 4018407 (1977-04-01), Aber
patent: 4216929 (1980-08-01), Holland, Jr.
patent: 4927100 (1990-05-01), Provenzo, Jr. et al.

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