An analysis of accelerations, airspeeds, and gust velocities from three commercial operations of one type of medium-altitude transport airplane Page: 2 of 33
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TECH LIBRARY KAFB, NM
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NATIONAL ADVISORY COMMITTEE FOR AERONAUTId 0065931
TECHNICAL NOTE 3365
AN ANALYSIS OF ACCELERATIONS, AIRSPEEDS, AND GUST
VEOICITIES FROM THREE COMMERCIAL OPERATIONS
OF ONE TYPE OF MEDIUM-ALTITUDE
By Thomas L. Coleman, Martin R. Copp, Walter G. Walker,
and Jerome N. Engel
Time-history data obtained by the NACA VGH recorder from one model
of a four-engine civil transport airplane during operations on three
routes are analyzed to determine the magnitude and frequency of occurrence
of gust velocities, gust and maneuver accelerations, and the associated
airspeeds. Variations of the gusts and gust accelerations with route
and flight condition are indicated. Estimates of the overall gust and
gust-load histories for extended operations on one route are obtained
by supplementing the data from the NACA VGH recorder with available data
from the NACA V-G recorder.
Past analyses of data from the NACA V-G and the NACA VGH recorders
(see, for example, refs. 1 and 2) have yielded information on the magni-
tude and frequency of occurrence of gust velocities, gust and maneuver
accelerations, and the associated airspeeds and altitudes for several
types of airplanes flown by different operators on various routes. This
information in the past has proved useful in the formulation of design
requirements, in studies of fatigue problems, and in the prediction of
gust and load histories for new types of operations.
As a continuation of the study of the gust and load histories for
transport airplanes, three samples of VGH records have been obtained from
four-engine commercial transport airplanes. These samples represent 1,012,
1,958, and 1,080 flight hours of operation on a transcontinental, trans-
pacific, and transatlantic route, respectively, and cover operations up
to an altitude of approximately 25,000 feet. A sample of V-G data
covering about 15,000 hours also has been obtained from the transconti-
4 nental operations.
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Coleman, Thomas L.; Copp, Martin R.; Walker, Walter G. & Engel, Jerome N. An analysis of accelerations, airspeeds, and gust velocities from three commercial operations of one type of medium-altitude transport airplane, report, March 1955; (https://digital.library.unt.edu/ark:/67531/metadc56052/m1/2/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.