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Page Title:
Test of 400 cycle receptacles and circuit breakers. |
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|  MIL-S-55257C(CR)
d. Turn controller to "External" and thermostatic control to
lowest temperature position. After a period of about five (5) minutes
the temperature of the air from the air duct shall be cooler than the am-
bient air in the shelter. The unit shall function smoothly and ammeter
reading shall have increased above the first observed reading.
Repeat for C.B. #4 and air con-
e. Turn off breaker #2.
ditioner #2.
(AN/
4.6.12 Test of 400 cycle receptacles and circuit breakers.
ASM-146 only).
a. Plug test lamp into each 400 cycle outlet and observe that
lamp luminates.
b. With test lamp plugged into one of the 400 cycle outlets,
throw off the 400 cycle circuit breaker. Observe that the lamp extin-
guishes, and goes back on again when the circuit breaker is turned on
again.
4.7 Rail transport, impact test. The shelter assemblage with
shelves loaded per 4.7.2, secured to a flatcar shall be impacted by a
loaded gondola car. The test shall be performed on a straight and level
stretch of track. The test flatcar with its timber blocking and shelter
tie down slings, shall be as specified in figure 1 and shall meet the
provisions of the test as specified in 4.7.1. The test flatcar (less the
shelter) and the two empty flatcars coupled to it shall each weigh be-
tween 45,000 and 55,000 pounds. The loaded gondola car shall meet the
provisions specified in 4.7.3 and shall have a total weight of 165,000
pounds. The loaded gondola car totaling 165,000 pounds traveling at 9
miles per hour (or equivalent energy conditions acceptable to the Govern-
ment Technical Representative) shall be impacted against the stationery
loaded test car coupled to the empty flatcars with brakes off. The test
shall consist of four impacts. The first two impacts shall be with the
door end of the shelter facing the loaded gondola car; the second two im-
pacts shall be with the door end of the shelter facing the opposite di-
rection from the loaded gondola car. The lashing, blocking and wedges
holding the shelter in place shall be tight at the start of each run. If
the blocking is torn loose or the lashing is broken during impact, the
run shall be repeated. After each impact the shelter assemblage shall
meet the requirements of 3.15.
4.7.1 Test flatcar. The wooden planking of the test flatcar bed
shall be in good condition. All 6x6 inch blocking shall be secured to
the bed of the flatcar using 10-inch spikes on 2-inch centers. The
blocking along the door end and opposite end of the shelter shall fit
tightly against the corner castings along the full length of the castings
except as necessary to clear the towing shackles. This shall be accom-
plished by means of power sawed notches. The blocking along the other
two sides of the shelter shall fit tightly against the corner castings,
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