Download PDF for 519cd81c993294098d516433 - CIA FOIA

. THIS IS AN unMOT
,
DO VET .: i. ' .„
•
Rof No ;AI0/8
18 Apr 45
SECRE T
NA
. I
V: • S.. E C*4' .; ,;;: .
. . i.Autii t ; Arz yt
SEVENTH ARMY INTERROGATION CENTER . *Init. : : .• • fri,•AY.'!:2: :1,..4..;:i
APO 758 • . US ARMY . :Date: 18 Apr445 •••:.:.:. s,. • •
I ' ' " " 1:: . • 6 :`. s' ' ...
ELECTROLYTIC CONDENSER FOR 11-2 RANGE-00NTROL DEVICE •
(This report should be read in conjunction with Report Ref'NO 3A10/0.
SOURCE
WAGNER, Karl, Prof Dr, a 43-year old scientist, prof at the DARMSTADT Technical
Institute. Source is a close-mouthed, lonely individual who is interested solelY in ' •
his research work. He talked rather reluctantly at first, but onoe an the subject.
of his scientific developments he did not hesitate anymore. Source claims to be at.
the Allies' disposal, but his sincerity is open to some doubt.
Source was assigned the task of compiling evaluation tables of rocket fuels by
the PE12:7:1411 ,3NDE Exporimontal Contor. Tight days before tho Allied oocupation of
DARMSTAZT, howovor, he was ordered to destroy thorn.
sating: B-3 Dato of Information: Mar 45 Interrogator: A.Z.
ELECTROLYTIC CONDENSER FOR V-2 RANGE-CONTROL DEVICE
Source dovolopod the oloctrolytic condonsor for Prof Dr BUCHOLD I s V-2 automatic•
range-control dovico (of Roport Rof No SLIC/6). Ho used a sodium chloride solution,
(Boo bolow) as oloctrolyto, and silver for one olootrodo; the other eloctrodo, also
of silver, was covorod by a thin layor of silver ohlorido. .
While loading tho condenser, the current is sont through it in such a way. that
the silvor chlorido layer is moved from ono silver oloctrodo to the othert • . 4
Ag+ ci+ e" Ag°4-01-
_
Tho amount of silver ohlorido used for the layor is prodotorminod by tho charge
with which tho condenser is to be loaded. By rovorsing tho polarity of tho cotichineer
(during the flight of tho V-2 missilo), the silver chlórido layer is moved baok.t6'
the first oloctrodo. As soon as the silvor chlorido has boon completely moved to the -
other electrode, a suddon incroaso of voltage from .1 v to 1.0 v is produced, duo'
to the hydrogen layer formed around the silvor. This voltage is improseed upon tho
grid of an amplifier tube which activates a relay (Rolay J, Roport Rof NO SAIO/Ok
tho relay, in turn l • oporatos the mechanical devico which stops the fuol combustion.
in the ,x7ojoctilo.
'
r, •
The oxact composition of tho solution is imol of sodium ohlorido, 1 mol of
acotic acid, and 1 mol of sodium acetate. Souroo omphasizod that most of tho difficulties
woro oncountorod in obtaining a pure solution.
Tho actual condenser was built in a containor 2 cm in diamotor and 6 cm high. Tho
accuracy of the fInal., signal was .0015 under laboratory conditions, but loss in
actual operation.
• •
18 April 1945.
SEVENTH ARMY INTERROGATION CENTER
PAUL KUBALA, Maj, MI, DECLASSIFIED AND RELEASED BY
Commanding. CENTRAL • INTELL IGENCE A.ENCY
ers-1"
SECRET
NAM WAR CRIMES DISCLOSURE ACT
SOURCES METHODS EXEMPT
I ON.38213
NAZI WAR CRIMES DI SCLOSURE ACT
DATE 2001 2007
.11