The pressure distribution over a standard and a modified Navy elliptical wing tip on a biplane in flight Page: 2 of 34
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NASA Techncl W
3 1176 01425 5831
NATIONAL ADVISORY CO01IITTEE FOR AERO TAUTICS
TECHNICAL NOTE NO. 433
THE PRESSURE DISTRIBUTION OVER A STANDARD AD A
MODIFIED NAVY ELLIPTICAL WING TIP ONT A BIPLATE I'T FLIGHT
By Richard V. Rhode
This note presents the results of flight pressure dis-
tribution tests on the right upper wing panel of a Douglas
M-3 airplane equipped in turn with a standard Navy ellipti-
cal tip and a tip having the same plan.form but modified in
its front elevation from the "swept-up" aspect of the stand-
ard tip to a symmetrical aspect.
The results are given in such form that the load dis-
tribution for any normal-force coefficient within the usu-
al range encountered in flight may easily be cetermined.
The results indicate that the modification in front eleva-
tion of the tip had no appreciable effect on the load dis-
This note presents the results obtained in pressure-
distribution tests in flight of a standard Navy elliptical
tip and a modified Navy elliptical tip. These tips consti-
tute the sixth and seventh tips of a series under investi-
gation, Results of tests on five tips have already been
reported: the "Douglas" tip in reference i; the square tip,
both with and without faired end, in reference 2; the semi-
circular tip in reference 3; and a modified elliptical tip
in reference 4.
During the tests herein reported, a rounded tip of the
Douglas form (see reference 1) was used on the right lower
panel below the tips under investigation. However, as was
shown by previous tests (reference 2), the results obtained
on the upper wing may be considered to be unaffected by the
shape of the lower tip.
The tests were made at Langley Field, Va., by the
National Advisory Committee for Aeronautics, late in 1931.
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Rhode, Richard V. The pressure distribution over a standard and a modified Navy elliptical wing tip on a biplane in flight, report, October 1932; (https://digital.library.unt.edu/ark:/67531/metadc54102/m1/2/: accessed March 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.