Résumé of NACA Stability and Control Tests of the Bell P-63 Series Airplane Page: 2 of 81
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NACA.-CMR No. LLJ19
NATIONAL ADVISORY COMMITTEE FOR AERONAUTITOS
MEMORANDUM REPORT
for the
Army Ar Forces
ESU OF NACA STABILITY AN',D CONTROL TESTS
OF THE BELT P-63 SERIES AIRPLANE
By Harold I. Johnson
INTR 0 D U.C TI 0 N
A resume report on stability and control tests of
Bell P-65 series? airolanes, which have been conducted at
the Langley Memorial Aeronautical Laboratory of the
National Advisory Committee for Aeronautics, has been
prepared and is presented herein. The purpose of this
report is to describe briefly and to summarize NACA wind-
tunnel tests conducted on models of the P-653 airplane
and NACA flight tests conducted with two P-65A-l airplanes
un to the present time. In general, tests having an
insignificant bearing on the possible development of the
airplane are entirely omitted. Details of testing
technique are also either omitted or treated only briefly.
In cases where comparable tests were made in the wind
tunnel and in flight, pnly the flight results are dis-
cussed. This is. done because the wind-tunnel stability
and control tests were entirely of a qualitative3 nature;-
the models used were of low scale and the tunnel velocities
were also low. Major emphasis is laid on conclusions that
may be drawn from the tests and on the opinions of NACA
personnelwith-regard to the merit of the .airplane and
the merit of possible changes which may increase the value
of the airplane from the stability and control stand-
point. The remainder of this, section of the report is
devoted to a brief chronological outline of the wind-
tunnel and flight stability and control-investig-ations
which have thus far been conducted on P-63 series air-
planes by the NACA. At the time of this writing flight
tests are still in progress.
lind-tunnel tests of P-63 series airplane models
were started in 1941 when a section model of the
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Johnson, Harold I. Résumé of NACA Stability and Control Tests of the Bell P-63 Series Airplane, report, October 19, 1944; (https://digital.library.unt.edu/ark:/67531/metadc61079/m1/2/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.