DEVELOPMENT OF ACOUSTICAL AIR-TO-AIR ROCKET

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00926A002700010003-0
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: October 31, 2012
• Sequence Number: 3
• Publication Date: November 2, 1950
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2012/11/01 : CIA-RDP80-00926AO02700010003-0
CLASSIFICATION SECRET/US OFFICIALS ONLY
? CENTRAL INTELLIGENCE AGENCY REP
INFORMATION REPORT DAS
CD
COUNTRY Hungary
SUBJECT Development of Acoustical Air-to-Air Rocket
ACQUIRED
DATE DISTR. -
oz/ NOV 1950
NO. OF PAGES z
(LISTED BELOW)
DATE CENTER SUPPLEMENT TO
ACQUIRE ~,HM USE REPORT
THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE
OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT 50
U. S. C.. 31 AND 32. AS AMENDED. ITS TRANSMISSION OR THE REVELATION
OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PRO;
HIBI TED BY LAW. REPRODUCTION OF THIS FORM IS PROHIBITED.
JOO -'
THIS IS UNEVALUATED INFORMATION
1. The rocket) largely motivated by
the urge to evolve some defense against the Soviet air attacks on Budapest.
G delegated the manufacture of wn I -nulvl
the various components to the managers of the various MAVAG divisions on an
informal basis. By late fall of 1944 the experimental model of the rocket was
ready for testing.
2. The only component of the rocket that MAVAG could not s 50X1-HUM
apply was the propellant
3.
explosive which was obtained from German it came from a plant near
Breslau did not know the material
of which the propellant consisted. It was brownish-black
-j-The-propellant was in the form of round
bars, in several dimensions, and was therefore easy to measure in terms of
amounts needed (so many bars of a certain diameter) to propel the rocket during
the tests. In the final test, enough propellant to drive 50X1-HUM
the rocket approximately one to one-and-one-half miles, ground to ground.
The body of the rocket measured 10 to 12 inches in diameter and from 35 to 40
inches long, exclusive of the head and exhaust tail; the latter was about 4 50X1-HUM
inches long. LAvailable is an original engineering
drawing labeled
4. The rocket head, containing the acoustical firing device was cut or slit to
admit sound or frequency impulses. The problem of the formation of a,vacuum,
STATE
ARMY
X
NAVY
AIR
x
SECRET/US OFFICIALS ONLY
Declassified in Part - Sanitized Copy Approved for Release 2012/11/01: CIA-RDP80-00926AO02700010003-0
 Declassified in Part - Sanitized Copy Approved for Release 2012/11/01: CIA-RDP80-00926AO02700010003-0
SECRET/US OFFICIALS ONLY
caused by the rocket's speed, which would block sound impulses from being picked
up by the acoustical device in the head, was finally solved by an acoustical
engineer, Charles Pulvary, an inventor not connected with MAVAG.. Wind tunnel
tests were successful in both demonstrating and finally solving this vacuum..
problem.
never heard what happened to the drawing-of the rocket
next day Budapest was surrounded by the Soviets and
50X1-HUM
Vibrating needle; vibrations depend upon
'length and mass of needle.
Wire ring
Audio frequencyOfAa given object can be found and needle adjusted to Jibe with
it.and close the circuit.- 50X1-HUM
Personalities involved in4the development of the rocket were few because most
persons handled only one. component and were not familiar with the final product;
in fact, most of these people did not know the components were intended for a
rockets This was aormal'procedure,? especially during 194+ when MAVAG was very
busy. However,: one engineer was assigned to handle all propelling problems
"
"
to
get. it flying
. He was Imre Koran, and
must still be in Hungax50X1-HIJM
part of the MAVAG plant at Diosgyor in 1945 and 1946 but was later demoted by the
Soviets.
artillery officer 50X1-HUM
of Hungary and was at that time T91+87 living in Haiti nr +7,P T)nmi ni tea? R,ri i A
Pulvary perfected the acoustical firing device
The basic idea,
ne would recall the rocket experiments. 50X1 -H U M
50X1 -HUM
9. Other persons involved in the development work on the rocket were Kalman Borbely
and Erno Weigl, both MAVAG engineers, who are still
10. Military personnel who took part in the testing at the ballistical testing area
called "Zero point" in western Hungary were: Colonel Bela Almay, who
is now somewhere in Bavaria; and Colonel Jeno Markotay-Velsz, who is 50X1 -H U M
now somewhere in Sweden.
11. The only critical material used in the rocket was magnesium and, of course, the
propellant which we secured from Germany,
not believe MAVAG would be the logical company to produce rockets in
quan1 y. a tube or pipe mill would be more suitable for production
runs of rockets. MAVAG was, and still is, essentially a heavy equipment
producer concentrating on locomot~.ves, etc. 50X1-HUM
SECRET/US OFFICIALS ONLY
? Declassified in Part - Sanitized Copy Approved for Release 2012/11/01: CIA-RDP80-00926AO02700010003-0
 SECRET
U. S. OFFICIALS ONLY_
Declassified in Part - Sanitized Copy Approved for Release 2012111101: CIA-RDP80-00926AO02700010003-0
F-Rmcmmv 15 R TROPF-1. nIXTJAE
1R4N?0X1bt; ANA frLUMINUM
Declassified in Part - Sanitized Copy Approved for Release 2012111101: CIA-RDP80-00926AO02700010003-0
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