Figure 123. Lighting unit MI-608/AM.
assembly to be fitted on various size water cans.
and hanger brackets during operation.
inch, left-hand thread at one end for connection
to a gas regulator or standard gas cylinder. The
other end of the fitting has a nipple to allow it
to be inserted in a hose.
i. Lighting Unit (fig. 123 ). The lighting unit
is a 2.6-3.8 VDC water immersion activated bat-
tery. It furnishes 30 minutes of light at tempera-
tures from + 800 F to -- 30 F. The lighting unit
is attached to a pilot or sounding balloon when the
Figure 124. Sounding balloon nozzle.
balloons are launched at night.
on one side of Spool DR8 is a terminal board
sounding balloon nozzle provides connection be-
fitted with two brass hexnut terminals. A hole in
tween the gas regulator and sounding balloon.
the spool, just below the terminal board, permits
It is used to weigh off a sounding balloon to the
the reel end of the wire to be connected to the
proper free lift. The sounding balloon nozzle con-
hexnut terminals. The reel handle assembly has
sists of a horizontal tapered inlet and an upright
U-shaped steel rods, with a loop formed at each
outlet over which a balloon nozzle can be stretched.
end, to encircle a reel handle bearing. Two bear-
A flat base holds up to five weights.
ings support the exle and Spool DR8 and rotate
freely when the wire is played out or when the
crank is used to rewind the wire. A crank, which
are used to prevent injury to persons or property
consists of a lever arm and a cast iron knob, is
from falling radiosonde sets or lighting units.
attached to one end of the axle. The straps are
l. Reel (fig. 1-25). The reel
is a lightweight
made of cotton webbing and adjusted by metal
portable unit designed to be carried by one man.
It consists of Spool DR8, a reel handle assembly,
an axle and crank, and adjustable straps. Mounted