System 112A - The Black Vault

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of 125°C. All bearings have been greased In accordance
with BLC 160-1. In add1t10n, lubricated dust
caps were placed over the rear bearing on four of the
motors. All motors are cycled on-off periodically,
and the test wUl be continued until eacb motor has
falled twice.
Thus far, 510 test hours had been accumUlated.
Four (uncapped) motors failed twice and were removed
[rom test. In each case, the Initial failure was
due to bearing contamination and wear; the second
fallure, after replacing tile bearings, was attributed
to rotor binding In the stator.
A fifth motor, containing a dust cap, faUed
because of open windings at 413 hours and was removed
from test. Two of the remaining 15 motors
still In operation have failed once; neither had dust
covers. The fallure In each case was attributed to
contaminated and worn bearings.
e. Completed Life Tests
The following life test programs ....ere completed
prior to this quarter. Test reports will be issued
after final evaluation of data.
(.) Radio Set, AN/DSW-l, Relay and Command
Subsystem (less servo components)
(2) Radar Set, AN/DPS-3, Unattended Search
Radar Subsystem (less servo components)
(3) FuzUlg System Components
(4) Missile Simulator Group
(5) YLR-67-BA-9 Rocket Engine
(6) ModlCted servo AmpUfl.ers
2. MISSILE LIFE TEST PROGRAM
a. GAM-63A No. 78
In the life test progrlUll, missile No. 78 has
completed 80 tests, Including 75 composite systems
tests. A summary of testing results follows:
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(1) Laboratory testing, less vibration, less
power plant
Reliability for 1st10 compoeites 68%
RellablIlty for 2nd 10 compo61~~e 77%
Rellablllty for 3rd10 composites 77%
Rellabtllty for 4th 10 composites 87%
Rellabtllty for 5th 10 composites 63%
Cumulative reliab1l1ty for the
50 composites 77%
(2) Vibration testing phase
Rellab1llty for missile, les8 pro­
pulftion system, including vibra­
tional tests
ReJlab1llty for 10 vibrational
tests alone
(3) Propulsion testing phase (15 tests
conducted at _55 0 to _65 0 F)
ReliabUlty for missile, less propulsion
system a..lCl asSOCiated
GAM-63A awdllary equipment
ReUabtHty for propulsion system
70%
Rel1abUlty for miSSile, IncludlrJg
propulsion system 50%
(4) Cumulative rellabll1ty for miSSile,
less propulSion system, for 80
tests 76%*
50 compOSites at ambient temperature
10 composite3 under 'libraUon
10 compoaltea (Propulsion system op­
5 Incomplete (eratlng at cold tempcompol!lltes
(erature
5 reference compos1tes at cold temperature
ljIStatistically, the 73% and 76% reUablUtles are
not considered Significantly different.
GAM-63A No. 78 is now at the Wheatfield plant
being prepared for altitude chamber environmental
tests. The tests will consist of 55 composite systems
testa ill 11 groups of five teats each. Teatlng
will be peJ'formed at temperatures ranging from
_100 0 to +2oo°F and at altitudes up to 100,000 feet.
b. GAM-63A No. 86
The second life-test miSSile, GAM No. 86, is
awaiting the start of the Initial phase of the life-wst
program which will Include 50 composite syste14S
tests. These testa will provide additlonal data ~rtinent
to determining the rellabiHty of the present
weapon system.
3. ENVIRONMENTAL RE-EVALUATION PROGMM
Testing of the flight control and inertial rangecomputing
systems is contlnulng in the environmental
re-evaluatlon program. Thus far, 1612 environmental
tests had been completed OD electronic and
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