Maximum rates of control motion obtained from ground tests Page: 2 of 16
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3 1176 01354 2114
NACA RB No. L4E31
NATIONAL ADVISORY CO~1!ITTEE FOR AERONAUTICS
MAXIMUM RATES OF CONTROL MOTION OBTAINED
FROM GROUND TESTS
By De E. Beeler
Ground tests were conducted in a specially constructed
cockpit rig to determine the maximum rates of control-
stick (elevator) motion and the corresponding maximum
stick forces that could be exerted, as based on results
obtained with a number of pilots.
The measurements indicate that the maximum rate of
push on the control stick is greater than the maximum
rate of pull; that the maximum rate of either push or
pull is less when a mental restriction is imposed upon
the pilot; and that the maximum rates at which the pilot
thought he would apply elevator control forces in flight
are considerably less than the rates at which he could
apply these forces with the same stick stiffness.
TNT RODUCTI ON
The maximum rates of control motion as well as the
maximum forces that a pilot can exert on the elevator
controls must be taken into account in the formulation of
rational design criterions for dynamic tail load computa-
tions. The maximum tail load consistent with the load
factor in vertical -plane maneuvers results when an elevator
motion is specified in which the elevator is moved as
rapidly as possible to a maximum value and held there for
such a time that, when the controls are abruptly reversed,
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Beeler, De E. Maximum rates of control motion obtained from ground tests, report, May 1944; (digital.library.unt.edu/ark:/67531/metadc61507/m1/2/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.