SECRET
HEADQUARTERS BERLIN COMMAND
OFFICE OF MILITARY GOVERNMENT FOR GERMANY (US)
BERLIN, GERMANY
S-2 Branch
APO 742, US ARMY
16 December 47
Subject: Horton Brothers (Flying Saucers)
To : Deputy Director of Intelligence
European Command, Frankfurt
APO 757, US Army
(SOURCE: A-2)
1. The Horten brothers, Reimer and Walter, are residing
in Goettingen at present. However, both of them are travelling a
great deal throughout the Bi-Zone. Walter at present is travelling
in Bavaria in search of a suitable place of employment. It is
believed that he may have contacted USAFE Head- quarters in
Wiesbaden for possible evacuation to the United States under "Paper
Clip". Reimer is presently studying advanced mathematics at the
university of Bonn, and is about to obtain his doctor's degree. It
is believed that when his studies are completed he intends to accept
a teaching position at the Institute for Technology (Techniscbe
Hochechule) in Braunshweig sometime in February or March 1948.
2. Both brothers are exceedingly peculiar and can be
easily classified as eccentric and individualistic. Especially is
this so of Reimer. He is the one who developed the theory of the
flying wing and subsequently of all the models and aircrafts built
by the brothers. Walter, on the other hand is the engineer who tried
to put into practice the several somewhat fantastic ideas of his
brother. The clash of personalities resulted in a continuous quarrel
and friction between the two brothers. Reimer was always developing
new ideas which would increase the speed of the aircraft or improve
its maneuverability; Walter on the other hand was tearing down the
fantastic ideas of his brother by practical calculations and
considerations.
3. The two men worked together up to and including
the "Horten VIII" a flying wing intended to be a fighter plane
powered with two Hirt engines (HM-60-R) with a performance of
approximately 650 horsepower each. After the "Horten VIII" was
finished, one of the usual and frequent quarrels separated the two
brothers temporarily. Walter went to work alone on the "Horten IX",
which is a fighter plane of the flying wing design, with practically
no changes from the model VIII except for the engines. Walter
substituted the Hirt engines with BMW Jets of the type TL-004. The
plane was made completely of plywood and was furnished with a
Messerschmidt ME-109 Landing gear.
The model of this aircraft (Horten IX) was tested extensively in the
supersonic wind tunnel (Mach No. 1.0) of the aero-dynamic testing
institute (Aerodynamische Versuchsanstalt), located in Goettingen.
The tests were conducted in the late summer of 1944 under the
personal supervision of Professor Betz, chief of the institute. Betz
at that time was approximately sixty years old and next to Prandtel
(then seventy-eight years old), was considered to be the best man on
aerodynamics in Germany. Betz's attitude toward the flying wing is
very conservative to say the least. Basically he is against the
design of any flying wing. According to the official reports about
the tests, air disturbances were created on the wing tips, resulting
in air vacuums, which in turn would prevent the steering mechanism
from functioning properly. This seems logical as, of course, neither
the ailerons nor the rudders could properly accomplish their
function in a partial vacuum created by air disturbances and whirls.
In spite of that, two Horten IX's were built and tried out by a test
pilot, Eugen (now living in Goettingen) at Rechlin in the fall of
1944. One of the two planes, piloted by another test pilot,
developed trouble with one of the jet engines while the pilot was
trying to ascertain the maximum rate of climb. The right jet stopped
suddenly, causing the aircraft to go into an immediate spin and
subsequent crash in which the pilot was killed. Eugen, however, was
more fortunate in putting the other ship through all the necessary
paces without the least trouble. He maintains that the maximum speed
attained was around 950 km per hour, and that there were no steering
difficulties whatsoever, and that the danger of both head and tail
spins was no greater that any other conventional aircraft.
After extensive tests, the Horten IX was accepted by the German Air
Force as represented by Goering, who ordered immediate mass
production. The first order went to Gothaer Waggon Fabrik, located
in Gotha (Thuringia) in January 1945. Goering requested that ten
planes be built immediately and that the entire factory was to
concentrate and be converted to the production of the Horten IX. The
firm in question received all the plans and designs of the ship. In
spite of this explicit order, production of the Horten IX was never
started. The technical manager of the firm, Berthold, immediately
upon receipt of the plans, submitted a number of suggestions to
improve the aircraft. It is believed that his intention was to
eliminate the Horten brothers as inventors and to modify the ship to
such an extent that it would be more his brain child than anybody
else's. Numerous letters were exchanged from High Command of the
German Air Force and Dr. Berthold, which finally were interrupted by
the armistice in May 1945. When US troops occupied the town of
Gotha, the designs of the Horten IX were kept in hiding and not
handed over to American Military authorities. The original designs
in possession of the Horten brothers were hidden in a salt mine in
Salzdettfurt, but the model tested by Eugen was destroyed in April
1945. The original designs were recovered from Salzdettfurt by
British authorities in the summer of 1945.
The Horten brothers, together with Dr. Betz, Eugen and Dr. Stueper
(the test pilot of the aerodynamic institute in Goettingen), were
invited to go to England in the late summer of 1945 where they
remained for approximately ninety days. They were interrogated and
questioned about their ideas and were given several problems to work
on. However Reimer was very unwilling to cooperate to any extent
whatsoever, unless an immediate contract was offered to him and his
brother. Walter, on the other hand, not being a theoritician, was
unable to comply and Reimer was sufficiently stubborn not to move a
finger. Upon their return to Goettingen Walter remained in contact
with British authorities and was actually paid a salary by the
British between October 1945 and April 1946, as the British
contemplated but never did offer him employment. Walter subsequently
had a final argument with his brother and the two decided to part.
Reimer then went to the university of Bonn to obtain his degree, and
Walter organized an engineering office in Goettingen which served as
a cover firm to keep him out of trouble with the labor authorities.
Walter married Fraulien von der Groeben, an extremely intelligent
woman, former chief secretary to Air Force General Udet.
In the spring of 1947 Walter Horten heard about the flying wing design
in the United states by Northrop and decided to write Northrop for
employment. He was answered in the summer of 1947 by a letter in
which Northrop pointed out that he, himself, could not do anything
to get him over to the States, but that he would welcome it very
much if he could come to the United States and take up employment
with the firm. He recommended that Walter should get in touch with
USAFE Headquarters in Wiesbaden in order to obtain necessary
clearance.
4. As can be seen from the above, most of the Hortens' work took place
in Western Germany. According to our source, neither of the brothers
ever had any contact with any representative of the Soviet Air Force
or any other foreign power. In spite of the fact that Reimer is
rather disgusted with the British for not offering him a contract,
it is believed very unlikely that he has approached the Soviet
authorities in order to sell out to them. The only possible link
between the Horten brothers and the Soviet authorities is the fact
that a complete set of plans and designs were hidden at the Gothaer
Waggon Fabrik and the knowledge of this is known by Dr. Berthold and
a number of other engineers. It is possible and likely that either
Berthold or any of the others having knowledge of the Horten IX
would have sold out to the Soviet authorities for one of a number of
reasons. However, this will be checked upon in the future, and it is
hoped that contact with the the Gothaer Waggon Fabrik can be
established.
5. As far as the "flying saucer" is concerned, a
number of people were contacted in order to verify whether or not
any such design at any time was contemplated or existed in the files
of any German air research institute. The people contacted included
the following:
Walter Horten
Fraulien von der Groeben, former Secretary to Air Force General Udet
Guenter Heinrich, former office for research of the High Command of
the Air Force in Berlin
Professor Betz, former chief of Aerodynamic Institute in Goettingen
Eugen, former test pilot
All the above mentioned people contacted independently and at
different times are very insistent on the fact that to their
knowledge and belief no such design ever existed nor was projected
by any of the German air research institutions. While they agree
that such a design would be highly practical and desirable, they do
not know anything about its possible realization now or in the past.
[signed]
HARRY H. PRETTY
Lt Col GSC S2
Telephone BERLIN 44715
Copy furnished: Director of Intelligence, OMGUS
|
As a result of Gen. Twining's
Letter, Lt Col Walker, at the Air Material Command,
asked his operatives in the field to discretely track down the
Horton brothers and ascertain whether their radical "Flying Wing"
designs- developed during WWII- might be responsible for the rash of
Flying Saucer sightings in 1947.
This is the report from
the Berlin office. |
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