An analysis of the airspeeds and normal accelerations of Boeing S-307 airplanes in commercial transport operation Page: 3 of 29
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NACA TN No, 11l41
effect of airplane characteristics, operating speeds,
terrain, and season on the applied loads for which the
wing structures of new airplanes must be designed.
The over-alloicture of airsoeed and acceleration
for transport airplanes is presented in reference 2
in the form of composite V-G envelopes for several
airplanes operating in various parts of the world.
Presentation of the data in this form, however, evi-
dently contributes little to the determination of the
significant factors affecting the. iposed loads or to
the prediction of the future accelerations that will
be experienced by transport-airplanes. In order to
determine significant factors and to predict trends,
methods of analyzing the V-G date that wculd take
these Droblems into account had t-u be developed.
Recent-attemots to develop such mettads have led to
the utilization of simple statistical procedures
that predict the accelerations experienced by trans-
oort airplanes with a high degree of accuracy (refer-
The present naper has been prepared to give the
results of the analysis of the V-G records obtained
from three Boeing S-307 airplanes operating in the
Caribbean region and the northern part of South
America during the period from 1940.to 19LjI. The
data have been analyzed to indicate the influences
of prewar and war operation and of seasonal operation
on the applied loads experienced during commercial
SCOPE AND EVALUATION GF DATA
A total of 311 V-G records representing 17,095
hours of flight was available for the present analysis.
These records were obtained from three S-307 airplanes
operated by Pan American Airways during the period
from April 1940 to September 194 in the Caribbean
region and the northern part of South AmerIca. The
records were supplied to the Langley Memorial Aero.-
nautical Laboratory of the NACA by PAA together with
the dates of installation and removal, the number of
flight hours per record, the routes flown during the
time the record was installed in the-airolane, and
occasional supplementary remarks regarding unusual
atmospheric conditions or operating practices.
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Peiser, A. M. & Walker, W. G. An analysis of the airspeeds and normal accelerations of Boeing S-307 airplanes in commercial transport operation, report, September 1946; (digital.library.unt.edu/ark:/67531/metadc55014/m1/3/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.