Observations of the improvement in vision brought about by the application of a rain-repellent lacquer on an airplane windshield Page: 3 of 9
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the glaes; i' tended to gather at the edge of the lac-
quered portion ani only after considerable tilt. was given
to the glans pahnewould the water run onto the lacquered
part. It then ran over it in the form-of small rivulets
rather than as a sheet as it-did on the unlacquered part.
As a generalization, it nay be said that the action of the
water on the lacquered surface was sinilar to that of noer-
cury on glass.
.The application of the lacquer -to glass involved sev-
eral steps. Two separate solutions were nixed together
and the resultant solution was applied within a day. (It
became cloudy and was no longer useful for the intended
purpose if allowed to stand longer. However, recent ex-
perinents making use of one solution alone were reported
as successful.) The glass to which the lacque6 wase ap-
plied was warned to a tenporature of about 110 . . (Tho
heating may b'oe acoonplished by the use of a hot plate,
heating pad, or hot-air blower.) If the glass was not
warned, the drying of the lacquer took considerably
longer and halation also occurred, which was not present
in the lacquer applied on warn glass. The lacquer dried
in abbat'one hour whon appliod to warn glass. It was ap-
pliod in one stroke of a saturated pad which had boon
bent round the straight odgo of'a pioco of glass. It ap-
poarod that tho use of a heating pad would pornit the
lacquer to beo applied on glass windshields that aro not'
ronrovblo from tho airplane. Although nost of'tho obser-
vations woro nado with the lacquer applied on glass, ob-
seorvations woro also nado with tho.lacquor applied on
ploziglas. Its action on ploxiglas was identical with'
That on glass and in no way did tho lacquor appear to ad-
versely affect the surface of the plexiglns.
The laccnuer suffered fron the accunulation of dust'
and dirt as.nuch as any glass surface.. It is thought that'
the removal of dirt from the lacquered surface nay be somo-
what of a problon as the lacquered surface was easily -
narred. Tho durability of the lacquer with respect to thod
action of sunlight, heat, salt-water spray, and gonoral
sor'vice use was not s.tudied.-
I EZST, -35ULTS, D D DISCUSSION
All tests and oboservations were nade on a Lockhood.
i1a airplane 10-17397 furnished by the Lorr Laboratorioes.
Tosts and obeorvatione were nade oo tho ground and in
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McAvoy, William H. & Clousing, Lawrence A. Observations of the improvement in vision brought about by the application of a rain-repellent lacquer on an airplane windshield, report, May 1942; (digital.library.unt.edu/ark:/67531/metadc62317/m1/3/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.