(U) MINUTES OF PASSIVE ECM COMMITTEE

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP33-02415A000100430035-4
• Release Decision: RIFPUB
• Original Classification: S
• Document Page Count: 5
• Document Creation Date: December 9, 2016
• Document Release Date: January 3, 2000
• Sequence Number: 35
• Content Type: MEMO

ed For Release 2001/03/0$~QDP33-02415A000100430035-4
H E A D Q U A R T E R S
AIR RESEARCH AND DEVELOPMENT COMMAND
UNITED STATES AIR FORCE
Post Office Box 1395
Baltimore 3, Maryland
ADDRESS REPLY TO
COMMANDER, ARDC; ATTN:
SUBJECT: (U) Minutes of Passive ECM Committee
TO: Dr. Frank Rodgers
Lincoln Laboratory
Lexington, Massachusetts
1. Inclosed is a copy of the "Minutes of the First
Meeting of the Joint USAF-USN-Lincoln Laboratory Committee
on Passive ECM." Because of the sensitive nature of the
subject, recipients are advised to not disseminate the
information contained in the minutes to persons other than
committee members or alternates.
2. For your information, there is also inclosed a
complete listing of all persons associated with the
committee and the mailing address of each.
C.
2 Incls NORMAN C. APPOLD
1. Minutes of Colonel, USAF
Meeting Chief, Special Project Office
2. Mailing List Assistant for Aircraft Systems
IF INC NO. 1 IS WITHDRAWN (OR NOT
ATTACHED)., THE CLASSIFICATION OF THIS
CORRESPONDENCE WILL BE DOWNGRADED To
CONFIDENTIAL IN ACCORDANCE WITH AFR 205-1.
*USAF Declassification/Release Instructions On File*
SECRET
Approved For Release 2001/03/01 : CIA-RDP33-02415A000100430035-4
 Approved For Release 2001/03/01 : CIA-RDP33-02415A000100430035-4
SECRET
Minutes of the First Meeting of the Joint USAF-USN-
Lincoln Laboratory Committee on Passive ECM
1. The first meeting was held in Room 5C1040, the Pentagon
Building, at 1330 on 6 September 1957. Present were.,
Dr. G. E. Valley, Chairman
Colonel N. C. Appold, USAF Member
Colonel R. J. Nunziato, USAF Member
Colonel C. H. Lewis, USAF Alternate
Commander N. E. Petersen, USN Member
Dr. R. W. Wright, USN Alternate
Dr. F. A. Rodgers, Lincoln Laboratory Member
Mr. R. C. Butman, Lincoln Laboratory Member
Mr. T. C. Bazemore, Lincoln Laboratory Alternate
Major G. H. White, Recorder
Lt Colonel R. J. Thompson., Guest Speaker
2. The following are items which were to be covered at the
meetings
a. Review of the USAF radar camouflage program.
b. Review of the USN radar camouflage program.
c. Review of the Lincoln Laboratory effort on RAINBOW
(Confidential Title) including these specific points: (1) the
model testing program at Westinghouse; (2) the assistance Lincoln
is getting from the Polaroid Corporation; (3) progress at Lockheed
Aircraft Corporation with RAINBOW (Confidential Title) material.
d. Agreement on the general statement of work for the
Lincoln Laboratory.
3. Lt Colonel Robert J. Thompson, Chief of the Electronics
Warfare Laboratory, Rome Air Development Center, gave a presenta-
tion of the Air Research and Development Command's efforts in the
field of radar camouflage. The presentation covered the following:
a. Dr. Gaetano Latmiral, University of Naples, Italy.
A study of the electrical properties required for a material
providing 20 db power attenuation at X.Band frequencies.
b. University of Goettingen, Germany. A study program
on resonance and magnetic dipole absorbers, and absorption of energy
by media possessing internal magnetic fields.
c. Polytechnic Institute of Brooklyn. Study and experi-
mentation using lossless dielectrics and resistance sheets for a
layer-type absorber suitable for ground applications.
SECRET _ _,z-
Approved For Release 2001/03/01 : CIA-RDP33-02415A00(~d 4366 5J4~
Copy6 of 12
 Approved For Release 2001/03/01 : CIA" R e
~P415A000100430035-4
d. Bjorksten Research Laboratories, Madison, Wisconsin.
Present approach is toward the use of high loss magnetic materials
in a dielectric matrix. Primarily for application to ground structures
with possible application to aircraft.
e. Deutsche Magnesit, Munich,, Germany. A multi-layered
paint type of absorber approximately 2 mm. thick. Laboratory tests
have indicated 95% power absorption at 9300 me/s.
f. Emerson and Cuming material. An absorbent material
inserted in plastic honeycomb. The material is approximately one
inch thick and laboratory tests have measured 95% power absorption
from 2500-13,000 me/s. The material is to be applied to a T-33 for
full scale flight testing.
g. Battelle Memorial Institute. A study program to reduce
the radar cross section of aircraft9primarily
frequencies. directed at the lower
L Dr. Rufus W. Wright, Naval Research Laboratory, gave a
presentation of the USN effort on radar camouflage. Work is directed
primarily toward application to naval vessels.
5. Dr. Rodgers, Lincoln Laboratory, gave a summary of current
Lincoln work on RAINBOW (Confidential Title) material. The present
work consists oft
a. Effort on a continuous process which is a homogeneous
coating to replace the geometric arrangement of conductive squares.
b. Study of the equivalent circuit of the material to more
fully understand its characteristics. (In this regard, Dr. Rodgers
stated that work to date indicates the material behaves like a series
RC circuit.)
c. Improvement of field reflection!measurement techniques.
d. Scale model reflection measurements. Westinghouse has
been conducting the measurements and has been troubled by a 15 db
dynamic range measurement limitation in their equipment.
6. Dr. Rodgers stated that the Lockheed Aircraft Corporation and
the Polaroid Corporation were having difficulties with the RAINBOW
(Confidential Title) material. The process used by Lockheed to apply
the material to the aircraft surfaces affects the material so as to
alter the electrical properties as built in by the Polaroid Corpora-
tion. Therefore, the point involved is not a difference of opinion
as such but rather a case where a mutually compatible material and
application process must be found.
SECRET
Approved For Release 2001/03/01: CIA-RDP33-02415A0G0(Y430 7
 Approved For Release 2001/03/01 : CIA-RDP33-02415A000100430035-4
FRET
7. The proposed Lincoln Laboratory program for the Air Force
and Navy was discussed. Dr. Rodgers said that current Lincoln
thinking on the scope of proposed work would be expressed by stating
two changes to the proposal dated 13 May 1957 and identified as
PLJW-960 The two changes are;
testing.
a. Delete paragraph 2.2 relating r:o full scale flight
b. Add a paragraph numbered 2,1.2 as follows;
"Model Tests. To determine the degree of optimum
coverage,, approximately 1/10 scale model teats should be conducted
using materials having the correct electrical characteristics."
(Dr. Rodgers added that some work remained to insure that such teats
are completely valid although present indications are that the tests
will be useful.)
8. Colonel Appold amplified on the deletion of full scale
flight tests from the Lincoln proposal. The deletion does not
mean such tests are not desirable, but rather that such work is
not imminent and a decision on the Laboratory's participation can
be made at a later date. Comprehensive flight tests may take a
year or more and may well start during this fiscal year (FY 58).
Deletion of flight testing for the time being probably will allow
a downward revision of the funds initially required for the Lincoln
proposal. For economic reasons, it will be desirable to use exist-
ing radar facilities as much as possible when flight tests are
undertaken. Also, it is anticipated that considerable planning and
coordination will be required and the assistance of Lincoln in
this will be required.
9. Commander Petersen expressed the desire that time schedules
be included in the Lincoln proposal. Colonel Appold said he certainly
agreed and that time schedules and fiscal estimates would be included
in the discussions and negotiations between ARDC and Lincoln Laboratory
when the Laboratory is in a position to go into more detail on the
proposal. (Action required b ARDC and Lincoln.) (Dr. Rodgers
informed the group a other work been ex ended considerably
past previous estimates and that although the work would definitely
contribute toward the USAF-USN program, it precluded the Laboratory
from working full time directly on such a program per se.)
10. The subject of funds for the Laboratory to support the new
program was discussed. At present, FY 58 funds of $500,000 to be
provided equally by the Air Force and Navy, are tentative
As of the meeting date Lincoln had not received any of the money. rammed.
SECRET
Approved For Release 2001/03/01: CIA-RDP33-02415Ar07_0,9P& 1
 Approved For Release 2001/03/01 : CIA-RDP33-02415A000100430035-4
SECRET
The Navy plans to turn over x$250,000 to the Air Force to be
applied to the Lincoln budget, These funds have not yet been
received by the Air Force and Commander Petersen said that he
was not sure when they would be available in view of the
uncertainties associated with the budget in general, The Air
Force has reached an agreement with Lincoln to have its share
accomplished within the P-600 FY 58 funds provided to the
Laboratory by the Air Force. Dr, Rodgers stated that any
reduction in the FY 58 funds budgeted to Lincoln by the
Air Force may affect the magnitude of work to be undertaken
by the Laboratory. It was agreed by the committee that this
matter was a subject outside of its control, The Joint Services
Advisory Committee for the Lincoln Laboratory and ARDC would have
to resolve this and arrive at a mutually satisfactory solution.
(Action required b Hq USAF, DCS ,) Discussions must also take
place between A CC and Lincoln regarding the details of the work
proposal and fiscal estimates. (See paragraph 9 above where
action is required by ARDC and Lincoln,
11. The next meeting of the committee is tentatively set
to be held during the month of December 1957. When the specific
time and place are determined, all members will be notified,
1c,41t,R.,..?c c -
NORMAN C.APPOLD
Colonel, USAF
Distribution2
Chairman 1 copy
USAF 1 copy each member and alternate
USN 1 copy each member and alternate
Lincoln 1 copy each member
SECRET
C 7- /is 6'-:0
Approved For Release 2001/03/01 : CIA-RDP33-02415A000100430035-4