Flight tests on airplanes Page: 2 of 39
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NATIONAL ADVISORY COMITTE 7 H AERONAUT 1.i
EEo 0 AERONAUT
TECHNICAL .UJOR:UM NO. 359.
FLIGHT TESTS ON AIPLANS. :::
ship without careful preliminary calculations and practical
tests with models. Unfortunately, experiments seldom have
been performed on the finished aircraft themselves, for verify-
ing the results of such preliminary work. This is due partly
to a fundamental aversion to such experiments and partly to
fear of the difficulties and cost, as also to a certain mis-
trust of the reliability of results obtained on aircraft.
If I succeed in dissipating some of these apprehensions
and prejudices, the object of my lecture will be accomplished.
In order, however, not to raise your expectations too high, I
should remark in advance that there is nothing fundamentally
now about my experiments. I am prorptcd to ma ke this report
to you on the experiments I periormoed as a coworker with the
"Deutsche Versuchsanstalt fur Luftfaht," only by the hope of
being able to present methods for king flight tests on air-
penes in a new, practical form.
i From "Berichte Iud Abhrndlmungen r Wissenschaftlichen Gesoll
scat ft Lutrfarti (A supplrement to "Zeit chrift fr Flu
techno k und otorlutschiffahrt"), July, 1935, pp. 38-4.g
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Koppe, Heinrich. Flight tests on airplanes, report, April 1, 1926; (digital.library.unt.edu/ark:/67531/metadc65176/m1/2/: accessed May 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.