Analysis of wind-tunnel stability and control tests in terms of flying qualities in full-scale airplanes Page: 4 of 60
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measurements and observations are made with respect to
the airplane body axes, the use of the "stability" axes
as recommended in reference 2 will probably be satisfac-
tory for the normal range of test conditions, and these
axes are used throughout the present paper.
7) It is assumed that all necessary tunnel corrections
a will be made before any analysis is attempted and that
the measured data will be sufficiently accurate for use
in predicting flight characteristics with reasonable
The NACA requirements for satisfactory flying
qualities, as explained in detail in reference I, are
used as a basis for the procedure suggested herein and
constitute the list of subjects on which it is believed
comments should be made in the presentation of wind-
tunnel data relating to stability and control. The com-
plete series of tests is not considered essential for
every airplane; the list of requirements is included in
its entirety for the purpose of pointing out the desired
form of analysis for any phase of stability and control
It is realized, of course, that the requirements for
satisfactory flying qualities may undergo constant re-
vision with time. By methods similar to those indicated
in the present paper, however, wind-tunnel tests may be
used for the investigation of any revisions of the present
requirements or for the investigation of a completely
different set of criterions.
For purposes of clarity and convenience, each of the
present NACA flight requirements is given in the text,
accompanied by recommendations regarding its relation to
Unless otherwise specified or-imnlied, the require-
ments should be investigated for all conditions of flight,
special attention being given the conditions that appear
to be the most critical.
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Kayten, Gerald G. Analysis of wind-tunnel stability and control tests in terms of flying qualities in full-scale airplanes, report, October 1943; (digital.library.unt.edu/ark:/67531/metadc279513/m1/4/: accessed May 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.