Measurement of Visibility From the Pilot's Cockpit on Different Airplane Types Page: 2 of 24
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NATIONAL ADVISORY C-OMMITTEE ..FOR AERONAU.TICS
. TECHNICAL ME MORANDUM NOi. '646
-. EA S: REiENT OF VISIBILITY FROLi TZiE PILOT'S -COCKPIT
ON DIFFERENT AIRPLANE TYPES*
By Gerhard Kurz
I. Purpose of the Investigation
Among the numerous fields .of postwar airplane con-
struction in which a more thorough development is being
undertaken, there remains an important field concerning
practical flight. This field is the investigation of the
pilot's view from the airplane and its numerical determi-
nation and representation, which has been almost over-
looked up 'to the present time. .Good visibility, however,
i-s one of the main requirements. for safe flying.
On an airplane, in which motion is possible in three
dimensions, the pilot must have an unobstructed view in
the direction of "flight, as also in any other direction to
which he might change the flight path. An airplane pilot
requires .therefore not only visibility.forward.and later-
ally, like the driver of a land vehicle but,. since a change
in- the.flight path -is possible for him in any direction, he
also requires the greatest possible forward range of vis-
,ion both t-pward and downward. Of course, the visibility
requirements differ according. to the different uses of the
airplanes.: The visibility requirements would therefore be
different for a transport airplane than for an airplane
used 'in stunt flying. In the case of a photographic air-
plaie,. the pilot requires, above all, vertical visibility
downward, so that he can keep in view the portion of the
landscape to be photographed, until the instant of flying
On account of these various requirements of visibil-
ity, -it is desirable for one who attempts to obtain numer-
; ,_. g II
*l"Hessung der Sicht vom Fuhrersitz verschiedener Flugzeug-
muster." Zeitschrift fur Flugtechnik und Motorluftschif-
fahrt, larch 28, 1931, pp. 167-176.
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Kurz, Gerhard. Measurement of Visibility From the Pilot's Cockpit on Different Airplane Types, report, November 1931; (https://digital.library.unt.edu/ark:/67531/metadc277430/m1/2/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.