CONTRACT(Sanitized) MONTHLY PROGRESS REPORT

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001800010055-3
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 3
• Document Creation Date: December 28, 2016
• Document Release Date: March 8, 2006
• Sequence Number: 55
• Publication Date: June 15, 1965
• Content Type: LETTER

Approved For-ease 2006/03/16: CIA-RDP78BO47701800010055-3
CA 65-68
15 June 1965
U. S. Government
Washington, D. C.
Attention: Contracting officer
Subject:
Monthly Progress Report
Gentlemen:
Pursuant to the requirements of subject Contract, we forward herewith me
reproducible and two copies of the twenty-second monthly progress report.
Some delays have been experienced during the final testing phase which
are postponing completion. At present, it appears that an additional four
to six weeks will be required to complete the tests proposed and prepare
the final summary report. However, a formal request is being submitted
in a separate letter.
Very truly yours,
Contract Administrator
OMS:ks
cc: Technical Representative w/enclosure
Declassification Review by NGA
Approved For Release 2006/03/16 : CIA-RDP78BO477OA001800010055-3
 Approved ForSease 2006/03/16 : CIA-RDP78B0477*01800q)
Model 933 Phasolver System
13 June 1965
This is the twenty-second monthly progress report describing the ac-
complishments during the month of May, 1965. During this month, the
testing program continued. This report details the results of the
testing and outlines anticipated progress during the month of June,
1965.
2. Survey of Accomplishments
2.1 The folio-ling portions of test 2 of the Phase II testing
procedure were completed:
A. Pattern Accuracy with Equal Amplitudes and Phase
Quadrature Drive Signals - Paragraphs 2.2 and 2.3
B. Preliminary Balance Accuracy and Test Repeatability -
Patterns III only, Paragraph 2.5
2.2 Interference between the 100 me counter and the Model 933
electronics unit,'ihich caused false readings to occur at certain
functions, was noted and corrected.
2.3 Modification of the test fixture to provide smooth linear
motion. The continual movement of the driver plate over the
coupler plate caused ''galling" of the metal "feet" upon which
the driver plate moves. This condition caused difficulty in
obtaining good repeatability.
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Result of Testing
3.1 Pattern Accuracy with Equal Amplitudes and Phase Quadrature
Drive Signals
The "Bow-Tie" pattern and the old Model 915B-1 pattern showed
considerably larger errors under these conditions than had been
calculated. The 915B-1 pattern exhibited a peak to peak error
of approximately 60 microns in a pole pair. The new "Bow-Tie"
pattern had an error of 45 microns peak to peak. Although the
error is quite large, our experience with rotary phasolvers in-
dicates that this error can be reduced by approximately 40 times
by balancing. hidowould yield an absolute accuracy of better
than + 1 micron with either pattern.
3.2 Balance, Accuracy, and Test Repeatability
Preliminary data indicates that an absolute accuracy of better
than + 1 micron can be obtained. The difficulties in obtaining
good repeatability due to thermal effects of the gage blocks
have been investigated and some corrective action implemented.
Approved For Release 2006/03/16 : CIA-RDP78BO477OA001800010055-3
 ,Approved Forl0ease 2006/03/16 : CIA-RDP78B0477*1800010055-3
The problems noted above regarding the 100 me counter and the
fixture "galling" unfortunately caused a loss of over two weeks
in testing time. In addition, the required correction to the
test fixture increased the gap to 0.0027" from 0.0015". The
modification dictates that the balance accuracy tests be performed
again to obtain valid comparison data for all future testing.
4. Anticipated Preress During June, 1965
4.1 Continue Phase II Test Program.-
4.2 Continue Investigation of Nonlinearity of Phasolver Test Set.
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Approved For Release 2006/03/16 : CIA-RDP78BO477OA001800010055-3