Lincoln Laboratory. Division 6

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MIT DIC 6889. Project Whirlwind Memo 6M-4085. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo M-3036. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo 6M-3075. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo M-2507. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo M-2457. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo M-2476. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo M-2407. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo M-2430. Bi-weekly progress report of Division 6 research teams.

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MIT DIC 6889. Project Whirlwind Memo M-3005. The possible eventual breakdown of the Quadruple Formex insulation in memory planes due to the abrasive action of vibrating memory cores could be prevented by wiring the planes with Bondeze #3 Magnetic wire. The resulting plane would have the windings bonded together, forming a strong grid with the memory cores firmly cemented at the intersections of the wires.

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Project Whirlwind Limited Memo L-86. Report on the Cape Cod experimental air defense system testing and demonstration held on 13 March 1953.

Scope and Contents Division 6 Memo M-3326. From 13 February to 28 February 1955, the performance of the central computer was monitored by studying log entries and by carrying out a series of tests on 28 February. Mean good-time and the per cent of assigned time that was unusable was determined by examining the log. Margins and trends in the margins were also determined. The test on 28 February consisted of shock tests and an eight-hour period during which various reliability programs were run. Includes: study...

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Division 6 Memo M-3332. On 1 March 1955, a new memory element was to be added to the computer. The evaluation procedure was set to duplicate the procedure used from 14 February to 28 February 1955, except that the memory test programs used during the test run was to test the new memory. More details may be found in Memorandum 6M-3326.

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Division 6 Memo M-3332-1. The second central computer evaluation test was to take place on March 18, 1955. During this test, special emphasis was to be placed on testing the memory. Less shock test was to be done. Otherwise, the test was to be the same as the first central computer evaluation test. Includes time schedule. Revision of a memo originally composed January 27, 1955.

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Division 6 Memo M-3719, Supplement #1. List of changes and additions to Division 6 personnel at Lincoln Laboratory in July 1955. Listed: name, number, room, group. Includes: telephone key and personnel listing.

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Project Whirlwind Memo M-2940. The XD-1 and XD-2 Systems have reached a point where changes cannot be made unless mandatory to insure operation. The production design is approaching a similar stage and any suggestions for changes should be made soon.

Scope and Contents Project Whirlwind Memo VI L-135-1. In response to the Bell Telephone Laboratories report entitled "The Ground Environment Problem in Air Defense: An Appraisal of the Lincoln Transition System," which called military attention to possible Transition System shortcomings in time to take corrective actions, persons associated with the Transition System note that the report is correct in two of its three principal points, but that the third and several minor points are based on misunderstanding....

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PL-BO-3. Division 6 Limited Memo 6L-246. Minutes of the Committee-236 meeting discussing ESS problem areas outlined in 6L-242, group responsibilities and schedules, extension of scope of Committee 236, ESS maintenance coordination planning, over-all test program, memo announcing system engineer appointment, and removal of manual height finders from ESS equipment list. Attendance: F. C. Frick, J. F. Jacobs, V. A. Nedzel, J. C. Starks, C. R. Wieser, E. S. Rich.

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PL-BO-2. Division 6 Limited Memo 6L-243. Minutes of the Committee-236 meeting discussing progress report on work of ESS planning staff, demonstrations of ESS operation, ESS systems engineer, simultaneous live interceptions in ESS, GE data link, and phone lines. Attendance: C. R. Wieser, S. H. Dodd, V. A. Nedzel, H. Sherman, N. H. Taylor, and E. S. Rich.

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PL-BO-4. Division 6 Limited Memo 6L-247. Minutes of the Committee-236 meeting discussing TIR release on Air Force operator requirements, ESS operator training, Cape Cod manning, ESS maintenance coordination planning, removal of manual height finders from ESS equipment list, visit from ADES Project Office, and over-all test program. Attendance: S. H. Dodd, F. C. Frick, P. Rosen, H. Sherman, C. R. Wieser, W. I. Wells, E. S. Rich, N. H. Taylor.

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Division 6 Memo 6D-52-1. List of Division 6 Memoranda, numbering 6D-52 through 6D-108. Includes: No. 6D, Title, Author, and Cls.

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Division 6 Memo 6D-52-1. List of Division 6 Memoranda, numbering 6M-4163 through 6E-2024. Includes: No. 6M -or- No. 6E, Title, Date, Author, and Cls.

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Division 6 Memo 6D-52-1. List of Division 6 Memoranda, numbering 6M-1 through 6M-4162. Includes: No. 6M, Title, Date, Author, and Cls.

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Division 6 Memo 6D-52-1. List of Project Whirlwind R-series memorandums, numbering R-90 through R-236. Includes: No. 6R, Title, Date, Author, and Cls.

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Project Whirlwind Memo M-2350. Memorandum on procurement of components for the XD-1.

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Project Whirlwind Administrative Memo A-149. All new computation notebooks will be issued by the Library. The notebooks will be serially numbered and a record of the person to whom issued will be maintained.

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Division 6 Memo M-3751. Operational specifications for the SAGE Direction and Combat Centers prepared in M-note form.

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MIT DIC 6889. Project Whirlwind Memo 6M-3215. The eighteen papers which were presented at the conference on ferrimagnetism at the U. S. Naval Ordnance Laboratory, 11-12 October 1954, are summarized. Pertinent discussions are also included.

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Division 6 Limited Memo L-154. Proceedings of a conference called by the AMC Joint Progress Office to discuss the proposed modification to the delivery schedule for AN/FSQ-7 duplex centrals. The agenda surrounded the following topics: field trials for performance evaluation test under field conditions, field trial facilities, interim production effort, large scale production, and the revised schedule. Includes an attendance list and full-page diagram.

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MIT DIC 6889. Project Whirlwind Memo M-2755. (This memorandum supersedes Engineering Note E-523.¹) The Model V and Model VI Core Drivers are standard test units which generate rectangular wave current pulses of variable amplitude, rise time, and duration. Model V supplies pulses negative-going from ground; Model VI, positive-going from ground.

Scope and Contents MIT DIC 6889. Project Whirlwind Memo M-2764. A transistorized core driver, employing one point-contact and one junction transistor, which can drive the equivalent of about 200 metallic magnetic memory cores in series is discussed in detail. A current output of 12 ma with a rise time of 0.3 µsec can be obtained from this circuit. The note begins with a discussion of the relative merits of point-contact and junction type transistors as core drivers. This is followed by an analysis of the...