Spray nozzles. The three nozzles
shown in figure 10-1 may be fabricated in any base shop
and used with equipment in the preceding paragraph (c)
with good results. Each is explained in the following
Bent tube nozzle. The bent
tube nozzle is made by drilling approximately 60 holes
along the longitudinal axis through one side of an
aluminum, brass, or steel tube. Holes are 0.043-inch
diameter. Tube is capped and bent in a tube bender to
give about a 90-degree fan spray.
Pipe nipple nozzle. The pipe
nipple nozzle consists of a one-inch pipe nipple with
0.0512-inch holes drilled radially around 90 degrees
from outer edge.
Pipe cap nozzle. The pipe cap
nozzle is hardest to fabricate. It consists of a 3/4 or
one-inch pipe cap with 0.0312-inch drilled holes in
center and 0.0469-inch drilled holes toward edges, all
radiating from a point In base of cap.
Aftemate application method.
Cold deicing fluid may be applied with a mop, broom, or
soft bristle brush if spray equipment is unavailable.
recommended to position personnel safely near wing
and tail surfaces during application of fluid.
Prevention and Removal of Snow, Ice,
and Frost Deposits. The following paragraphs contain
methods for the prevention and removal of snow, ice,
and frost deposits.
Prevention of deposits. The
following paragraphs explain the prevention of snow,
ice, and frost deposits.
prevention. If snow is expected, wing and tail covers
should be used. Deicing fluid should not be used for
protective coating if snow is predicted, except in
conjunction with installation of covers. If attempts are
made to use the fluid to prevent snow accumulation, a
frozen deposit will be encountered which is difficult to
remove. The fluid is diluted by the melting snow to form
a slush which freezes in place. Use of covers after
coating aircraft surfaces with fluid will prevent snow
from forming directly on aircraft and permit easy
removal of covers. If covers are unavailable, the best
method of preventing heavy snow accumulation is
constant removal by brushing or sweeping during the
Figure 10-1. Types of Spray Nozzles