PROJECT BLUE BOOK

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RETURN TO

The Albert F. Simpson

Historical Research Center
Maxwell AFB, AL 36112

LE

ete ee ct wee tee _-
ee eS ee *

-
.
vi1
UNCLASSIFIED

tions of such occu. ecessary tc maintai morale of
military and civi In th considered
that the establishm raining of personnel is
in itself worth the
v1
UNCLASCHFIED -
7 T
1

will be made apparant. (See Appendix B).
#
The prepare OAl
(a) Charts objects, to indi-
cate:
1. Type of
2. Vicinity in which particular was
served
(h) Flight
.
S-11750
NCLASSIFIED

and surround ader the same optical
canopy glass).
of logical factors
to be proviied in status report Quite probably, some
Command technical
cies..
The Air Weather Service has Lewed the list of inciderts
and has provided the information
both with respect to location and time, with release of
weather balloons.
S-11750
UNCLASSIFIED

satellite vehicl udy has nitiated with
Rand on snalysis
from this standpoint
pertaining to the basic d 'ormance characteristics
exists.
The Federal Investigatio Project "Sign"
in a number of instances, both by investigations of the character
and reliability of Itnesses of incidents and providing other
investigative services. -
S-11750

of the reporting witnesses ave been made.
TECHNICAL
A certain proportion cidents appear to real aircraft,
though conventional configuration. In order nvestigate
the credibility of existence the following factors must be
considered in any technical analysis.
Aircraft
Method lift)
Wings
Fusalas
be of small importance.
exchange requirements for the atomic-
power ngine appe physical dimensions of inordinate
uld powerplant
for aircraft.
S-11750
IED

to be the
Distinguishing des and are ex-
Project.
Probable Natural Phenomena
such short-rang ground (infantry) as the trench
mortar, hand grena C. The smalls saucer-like spinning,
-5- S-11750
UNCLASSIFIED

probabilities, no only
when complet vsical crash) are
available. Unddentifie grouped as
follows:
(1) Flying disks
(2) Torpedo or Cigar Shaped (no wings
in flight)
a sufficient urati orac-
tical use as
Flying Disks
The disk or circular planform has not been us ropresen-
tative aircraft, either ilitary or civilian, fo eason that
the induced drag, as determined by the Prandtl theory fft, would
UNCLASS IFIED S-11750

wind-tunnel work at the NACA (1933) showed both maximum lift co-
efficients and stall characteristics than
could b e anticipated.
The prob static longitudinal stability could possibly,
be solved by use of a stable airfoil section reflexed
Body)
body represents an efficient
form for the fuselage airplane the body of missile,
-7- S-11750
UNCLAS

The same v could also ha used fo tatic
balance or maneuvering.
The abov sta-
known s
Round lects. jects)
Spherical or balloon shaped objects, are usually considered
as efficient aircraft. ot only would the drag such bodies be
high, but the energy expenditure that would be required to develop
lift by aerodynamic would excessive. The only conceivable
UNCL S-11750

AMC
February 1949 Release Date:
GENCE
7.3745
HEADQUARTERS AIR MATERIEL COMMAND I
WRIGHT-PATTERSON AIR FORCE BASE 411
1003281
DAYTON, OHIO S-11750-18
UNCLASSIFIED DOWNGRADED AT 3 YEAR: INTERVALS;
DECLASSIFIED AFTER 12 YEARS. DOD DIR 5200.10
WF-(B)-O-9 JUL 48 1OM
. 3-10

in this Country.
Consideration has . that se
unidentified aircraft represent levelopments beyond
the level of knowledg sin sis
bility that LLizations 1st utside he
earth. The ntary this possi s Lipp of
the Rar Proje Appendix solution of
the mystery the sightin ientified flying
S-11750

a
UNCLASSIFIED

Directorate of Intelligence, Hq., USAF (AFOIR)
Office of Naval Intelligence (ONI)
Cambridge Fisld
Air weather
ton,D.
Ohio State University, Dr. Hynck
Rand Inc., Rand Project (USAF)
. Scientific Advisory Board (USAF) Dr. Valley
S-11750
11 UNCLASSIFIED

S-11750
12 UNCLASSIFIED

50
45
40
Z
35
15
10
5
0
Disc Sphere Cylinder Oyal Winged Cone Square Parachute Hoax Undertermined
.
UNCLASSIFIED
S-11750
13

32 1 1
1 1
.30 1 1
28 1
26 i 1
24 1 1
20 1
10
g
6
4 1 i
1 1
2 1
0 1
. 88 9
e
UNCLASSIFIED S-11750
14

19 1 1
18 1 1
1 1
17 I 1
16 1
i 1 i
15 1 1
14 1 1
13 1 1
1 1
12 1
11 1 1
5 1
4 1 1
1 1
3 1
2 1 1
1 1 1
1 1
0 1
8767
L76t uen s6t uer
I uep Trady
aed
UNCLASSIFIED S-11750
15

1
15 1 1
14 1
13 1
12 1
11 1
6 1
i 1
5 i/ -
4 1
3 1
2 1
1 1
1
0 1
L776T uer st6t uer 66t ver
Bed aeg
16 UNCLASSIFIED S-11750

17 i 1
16 i 1
1 1
1.5 1 1
14 1 1
13 1 1
1 1
12 !
11 1 A 1
6
1
5 1
4 1
3 1
— 1
2 1
1 i 1
O 1
8767
276t uer
Beg
17 UNCLASSIFIED S-11750

17 1 1
1 1
16 1
1 1
15 1 1
14 1 1
1 1
13 1
1
12 1 1
11 1 1
5 1
4 1
3 1
- 1
2 I
1 1
1 1
0 1
L76T u8r 6161 uep
red lali
UNCLA
18

When drawings, specifications, and other data prepared by the
War Department are furnished to manufacturers and others for use
in the manufacture or purchase of supplies, or for any other pur-
pose, the Government assumes no responsibility nor obligation
whatever; and the furnishing of said data by the War Department
is not to be regarded by implication or otherwise, or in any manner
licensing the holder, or conveying any rights or permission to
manufacture, use, or sell any patented inventions that may in any
way be related thereto.
.
The information furnished herewith is made available for study
upon the understanding that the Government's proprietary interests
in and relating thereto shall not be impaired. It is desired that the
Patent & Royalties Section, Office of the Judge Advocate, Air
Materiel Command, Wright Field, Dayton, Ohio, be promptly noti-
. fied of any apparent conflict between the Government's proprietary .
interests and those of others.
Espionage Act
Notice: This document contains information affecting the
national defense of the United States within the e meaning the
Espionage Act (U. S. C. 50:31, 32). The transmission of this docu-
ment or the revelation of its contents in any manner to an un-

B
Group 1 most numerous reports indicate the daytime
observation of objects, roughly in diameter
ten times their thickness. There is some suggestion that the
cross seotion is assymetrical and rather like a turtle shell.
Reports agree tha bjects are capable acceler-
ation and ightod ometimes
devices which. in the writer's opinion, are sounding balloons
of unusual shape such as are made by enerel Mills Company
to Navy contract.
Group 5 -- The group includes bjects
in which little placed.
.
UNCLASSIFIED S-11750
19

angle bject, can
be observed Likewise agreeme ong several
observers that the diameter obiec about
objects. This possible
to some extent if permissible to assume that they obey
the laws physics. Since en observed
-
UNCLASSIFIED S-11750
20

assumed size. on-linear character
indicate an upper object.
If, in addition. assumed that the flutter is due to
aerodynamic forces, it possible more precise informa-
tion could be obtained.
ling a solid object by unusual means.
Since some observers their reports
with
is well to examine what oossibilitiesexist alons these lines.
This is also important in view of the conclusions of PART II,
Section A. report.
.
UNCLASSIFIED S-11750
21

namely, 0 gauss thet the objest
subtended at then the ampere-turns of
the required P
n = 3OR
02 where
(assumed object) easureable,
moreover gradien not predictal to
local ore deposits Thus, evon if the eff ere large
enough to unreliable and unpredictable.
S-11750
UNCLASSIFIED
22

Aside from the fact that we have no suggestions
maie. the various theories of general
assuming that vitational force and
An distinguishable, and from this
assumption theories predic rtain effects which are in fact
observed. The assumption, therefore. robably correct, and a
be complete.
Section Possible causes for the
Classification Natural terrestrial phenomena
1. be feet
S-11750
23

Unfortunately,. there report phenomena by
pilots during the the incident fire-ball
3e8-
serpents for hundreds year
photograph.
It would tabulate the responses
to see how reliable were the reports
during the war. There we had a phenomenon proven to be real.
time?
recent publicity given to the satellite gram should give
the requi stribution.
necessary but certainly not suffi-
cient that the unidentified-object curve ani the crank-letter
curve should be similar in order for the flying disks to be
classed as hallucinations.
UNCLASS
S-11750
24

3. Space Ships: The
a. If there is an extra terrestrial civilization
which can make such objects as ar reperted then it is most
probable that its developmen: advance of ours. This
argument can be supported on probability arguments alone without
distance are A-bomb explosions expect some relation
to obtain between the time A-bor explosions time at
which the space ships time equired such
ome-base.
PART _III -- RECOMMENDATIONS
1.I The file should be continued.
2. A meteorologist should compute the approximate energy
S-11750
25 UNCLASSIFIED

ten times as as they hick: see if
0e9 s0, under
conditions approaching limiting resclutic r detectable con-
trast.
er
UNCLASSIFIED S-11750
26

compared desc flvi biec Mr. Collbohm
will delive opie VcCor right-Patterson Air
Base during few days.
A good eginning 19 discuss
of visiting space ships. Astronomers are largely in agreement
bilities nerge protected
themselves
phere, ucting homes and
cities# wi fically
11 they might be oupfe
where pressure
temperature. extremes would be reduced.
S-11750
UNCLASSIFIED
27

The reader opinion. If he belie es that the
life force is universal may have
once developed he as only to imagin they
persisted ess sphere which
is nearly devoid oxygen and water, and c
the niahts are much colder than our arctic winters. The ex-
istence of intelligent life on Mars is not impcssible but it is
adapt itsel
creature).
Venus has t two handicaps Her mass, and
are nearly as lerge as the Earth (Mars is smaller) and her
S-11750
28 UNCLASSIFIED

2 .
H. M. McCoy, Coronel, USAF
Department
Published by
Technical Intelligence Division
Intelligence Departnent, Air Materiel Command Release Date:
WrightPatterson Air Force Base, Dayton, Ohio February 1949
UNCLASSIFIED S-11750
DOWNGRADED AT S YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS.
E DOD DIR 5200.10

is eliminated cause ould make
such a survey flvin biects were
sighted in the Sprin afte total 5 atomic bomb ex-
are now can be assumed that
they hev space travel and that
their civ cation would be practically abreast of ours.
S-11750
29

assumption xoeot implif iscussion onsider-
ing the major tars.
Next, true variable stars on
to permit life. The number of stars deleted here is negligibly
small. Reference 3, pages 76 and 85 indicate that the most
given in reference 4, pages 52 tc 57. Eliminating according to
the above discussion: Three are white dwarfs, eight binaries
account for 1s stars and two trinaries account 6more. The
remainder, 22 can be considered as eligible
planets.
.
-
.
S-11750
UNCLASSIFIED
30

star.
There is no line reasoning or evidence which can indicate
whether life will actuall evelop on et where the conditions
are suitable the Earth may nique rath than a random
sample. This writer can only inject some personal intuition into the
ath
Arguments like those applied to Martians on page 2 need not apply
to races from other star systems. Instead of being a first port of
call, Earth ossibly be reached only after many centuries of de-
velopment exploratic with ships, 30 that a visiting race
sould be expected far in advance of Man.
24
UNCLA SIFIED 9-11750
31

trip without fueling, but slowing enough i atmosphere
to be visible (i making a landing). Since it
is nuclear will be iimited to the maximum
operating materials can withstand (heat must transfer
be kept to 10% of weight for
could be used payload four stage vehicle would then have a
gross weight (100) he payload: thus,
9 30
if the payload were 2,000 million
pounds at initial takeoff (Earth)
f
UNCLASSIFIED S-11750
32

large as to make the others completel; neglibible. If the visitors
were long lived and could "hibernate 80 years coming and
going, then 1/10 spee Light required
enormous velocity 18,00 per This is completely
be filled with fuel, the seco partial fuel, the
third would be empty. The staze would be thrown away during
flight. On the trip back secO and third
filled with fuel gross weight the initial
the orde gnitude of two-stage rocket.
UNCLASSI
33 S-11750

(a) ocket made
maneuverable as very high along
or normal to flight owever pace ship
will certainly and wieldy hardly be designed to
mheonly
appear as a luminous disk a persor rectly below. Observers at
a distance, however, would surely the rocket for what it
really is. There would probably blique views
than of end-on views. Of course, shape need cypical of
our rockets;: the exhaust should asy o gee.
UNCLASSIFIED S-11750
34

ecan't catch them.
It seems fruitless for them to keep epeating the same experiment.
Conclusions:
to be possible,
they are believed n particular, the actions
attributed to the "flying duri ng 1947 and 1948
seem inconsistent with the requirement
Very urs,
J. E. Lipp
Missiles Division
.
.'
JEL:sp
Rand.
7. oks
Blakiston 1943.
A
.
1 S-11750
UNCLASSIFIED
35

1
Rat Cye of Inclsures in A-2 Files
ace
AYBIR-CO-S lot Ind
TOI Comrsnding Gensral, Air Nateriel Cosrani, Dnyton, Ohio
ATTK: TSNAD-DB
Attsched hersto is information requ sted in basie letter.
no
DY CADR OF THA SHOR TARY OF REB AIR FOI
DOD DIR 5200.10 DECLASSIFIED AFTER 12 YEARS. DOWNGRADED AT 3 YEAR INTERVALS;
X Inolsi
1 4. AFRIRCO 5.
OFFICE SYMBOL 1. Lklo
Col Taylor
CRADE AND arShie.AIatola
BURNAME OF Oct 47
COORDINATING Gerrett
OFFICERS
16--2U542-9 0.8 G0919NN107 P01N7460 0021C6

ted that a record be kept of all persons reviewin .it tis reques-
witnessing with signatures and dates directly on th this drawing by
2. This e drawing.
has servod its drawing snould be returned to this offico when it purpose
Office Hq. for offiçial record. so that it can bo turned over to the Patent
30 Inelosed herewith is also a report / Aylants
AircraftE Establishment, Technical Note, AFRo prepared by the Royal 1
whichis considerd the Korten taillesnaircrafte The folloning 1703, which describes
do
e. through 5.
Lo Page 54, Photograph of Horten "Farabola".
attHs UNCLASSIFIED SECRET,
COPY U-39942
DOWNGRADED AT 3 YEAR INTERVALS; DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10

.
limited number of incidents as known ob-
jects. K
.
UNCLASSIFIED
S-11750

l9L7, indicates that lsoo aIrcraft, directly or indirectly
based on the Morten VIII dosign (six engine pusher, having a wing spread of 131 fee
pounds)ar boing and a gross weight of approximately thirtv-three thousand I
however, is built for bomber squadron use.
V-32291-8. propelled, Tho Russian version,
whose identification No. is
repor x095
if denired. No. F-SU-lllo-Md, also inclosed herewith, may be rtained by your office
FOR THE COMANDING GEHERALI
H. M. MeCOY
Colonel, Air Corps
Deputy Command
DOWNGRADED AT 3 YEAR INTERVALS:
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFIED CEORET
-2-
COPY U-39942
L
4

Uashington 25. D. C. Developrent
ATTENTION: Director, Research
Major General I Craigie
I0 Confirming the recent conversation of fhe undersigned with
Major General L. C. Craigie, 9 December loli7, attached as listed below
aro copies of the reports from this Headquarters concerning Flying
Discs.
2 Comments of Headquarters, Adr on these letters have
never beon recei ved by this Command. Continued and recont reports
from qualified observers concerning this phenomenon still makes this
matter one of concern to Hendquarters, Air Materiel Comnand. Intelli-
gence Department of this Cormand is continuing the collection and
analysis of all available reports.
FOR THE
H.M. MeCOY
Colonel, USAF
Chief of Intelligence
2 Attach:
ce ltr to CG, AAF, dtd 23 Sept L47
subj "aMC Cpinion Concering
"Flying Discs"n
cc 1tr to CG, AAF, dtd 2l: Sept Li7
subj "Flying Discs"
DOWNG"ADED AT LS;
DECLASHL. YEARS.
DOD DIR 5200.10
MRORET
3 U-53791
UNCLASSIFIED
V

"Flying Saucere
Coranding General, Army Air Force, Waehington 35, 0.0.
ATTHI AC/AS-2. Lt Col Oarrett
It is request-d that this cffice be furnished all/available
inforration concerning an alleged "Flying Sencer" flight sighting
made by a radar station in Japan. This incident was menticned by
Dr. Charles Carroll during a conference in Brig Gen Schulgen's
offiee attended by Mr. A.C. Loeddine. T-2 representative. on 5.
Sopterbrr 1947.
TOR THE COMAAIDING OEU RALI
.
DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
y
SEAET
UNCLASSIFIED
L

tion and commento The incident reported in aubmittod for your informa-
Journal" on la Novenber ln47, and should he followed up if Soattle appoared in tho "Dayton
poesible.
Spain evidently wus printad in a nurber of leading 2. The stary by Lionel Shapiro regarding war weapons developod in
the couatry. Te oignlflcuace of this artlole will h newapapors theoughout Dende
tain essential olementa for such allegod important de ents, such as upon cer-
"know-how". funds, materials, experimantal tnating facllities. and tochuological
The Gorman sofertiats at this Hq indioata he lntter ie supposed supplind by German sclentista.
from Geriany are working in Spain, and those mentioned in this artiole that no important scientiats
are not known to them. 9
quali ficatians, or any information that might help to identify the alloged mamo
German scientiets working in Spain.
4o A btie? atatement was made in e recent intelligence report from Filg
Ho USAF, AO/AS-?, regarding a flying dise incidont in Alaala in September.
Theclosa range sighting reported shoild render a more dotailed observatiqn
than what was reported, which al suggeets a follow-up.
5. It is further requosted that this offiee be advised as to progrose
teing made on the plotting of all flying dise incidents to dato, partiou-
larly in North Amorica. It was underatood that ir. Carrell was going to
plas thnae incidents, but no further word wus received regarding this of-
IR THE COMANDING GENEKALI
Anol I. M. MeCOY
newapapor olippinge Colonnl, Air Corpa
SEGRET Intalligence
UNCLASSIFIED DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS. DOD DA V-VO.1D

-
DOWNGRADED AT 3 YEAR INTERVALS; YEARS.
DECLASSIFIED AFTER 12
DOD DIR 5200.10
oN
UNCLASSIFIED
.-
conf , 5.
3. 4.
1. AFTAX 2.
OPFICE SYMBOL
GRADE AND 2
SURNAMZ OF
COORDINATING
OFFICERS 10 -24242 9 COVLONSENT FVINTINOFFICE

2. This Kile is forwarded so that
When photostating this saterial for your purposo. it WiLL
3. returned
et the sane tire the originals are retumed.
4. This file, and the duplieates, should bo returned es coon
Attentionl AC/As-2, Air Intelligenee
no posuihle to this Headquartero,
Roquirements Division, Collection Branch.
Ples
Inel
a/e in
par l.
Gce DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
N
UNCLASSIFIED
3. 4. vi
OFFICE SYMDOL 2.
GRADE AND Col.Tavler ri
SURNAMS OF
COORDINATINO
OFFICERS B 10-2242-3 U. R. GOYEGNMENT POENTINS CEPICE

SAVE
UN RIPLY ADDRETK' BOTH HEADQUARTERS
COMMUNICATION AND AIR MATERIEL COMMAND 2351
GENERAL, AIR MATEBISL LOPE TO COMMANDING
JOLLOWING OPFICE SVMBOL: COMMAND, ATTENTION TSDIN/HMM/18/6-4100
TSDIN WBIONT PIBLD, DAYTON,
SUBJECT: AMC Opindon Concerning Flying Disce
J
TO: Commanding General
Arny Air Forces
Washington 25, D. C.
ATTENTION: Brig. Ganeral George Schulgen
AC/AS-2
1. As requested by AC/As-2 requested by AC/AS-2 there is presented below-the considered there:is presented below the considered
opinion of this Comand concerning the so-called "Flying niacs. This
opinion is based on interrogation opinion is based on interrogati report data farniehed by AC/AS- rebort data furniehed by AC/AS- and and
preliminary studies by personnel ost T-? and Aircrart Laboratory, Engineer
ing ing Division T-3. This opinion was arrived at in a confarence Division T-3. This opinion was arrived at in a confarence between
persomel from the Air Institüte of Technology, Intelligesce T-, Offiee, from the Air Institute of Technology, Intelligesce T-, Office,
Chief of Chief of Engineering Diviaicn, aLizatnkireraft, Power Plant and Propeller Engineering Diviaicn, aLigtnghireraft, Power Plant and
Laberatories of Engineering niviedon T-3. Laberatories of Engineering niviedon T-3. Propeller
2. It is the opindon that It is the opinion that
a. The phenomenon reported is something real and not rieionary.
or fictitions.
b. There are obtects probably aprroxdmating the hape of
aircraft, E-made
There is a possibility that some cf the incidents may be
caused by natural phenomena, such as me eors.
d. The reported operating characteristics such as extreme
rates of climb, maneuv erability (particularly in roll), and action which
mudt be ccnsidered evasive wren sigted cr ccntacted by friendly air-
craft and radar, lend belier to the possioility thust some of the objects
are controlled either marually, autopa ically or remotely.
e. follows:-
(1) Metallic r light reflecting surface
DOWNGRADED AT 3 YEAR INTERVALS:
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFIED
U-39552

(4) Several reports of well kept formation flighte varying
from three to nine ob jecte.
(5) Normally no asssciated sound, except in three instances
substantial r rumbling roar was noted.
(6) Level fiight speeds normally above 3oo kmote are esti-
mated.
f. It is possible wi thin the present U. S. knowledge - pro-
vided extensive detailed development is undertaken -- to construct
piloted aircraft which has the general description of the object in sub-
paragraph (e) above which wouid be capable of an-approximate range of
7000 mdles at subsonie speeds.
g. Any developments in this country along the lines indicated
would be extremely expensive, tie consuming and at the considerable ex-
pense of current projects and therefore, 1f directed, should be set up in-
dependently of existing. dependently of existing rojects. rojects.
h. h. Due consideration must be given the followings- Due consideration must be given the followings-
(1). The possibility that these objects are of domestie
origin  the product of some high security project
not knowm to AC/aS-? or this Command.
(2) The lack of physieal evidence in the shape of erash
recovered exhibits which would undeniably prove the
exdstence of these objects.
(3) The possibility that some foreign nation has a for
of propulsior possibly nuclear, which is outside of
our domestie knowl ledge DOWNGRADED AT 3 YEAR INTERVALS:
3. It is recormended that DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
Headquarters, Arny Air Forces Issud a directive assigning
priority, security clenification and Code Name for a dotailed tady of
thin atter to ine ude the preparation of co late sete of all avtinal
and pertinent data which will then be made avadlable to the Ary Kavze
. Atomde Energy Conmission JrDE, the Air Force Scientifie Advilory Gromp,
MCA, and the RAND and NspA nrojecta for commenta and recomsendations
with  preliminary report to be forwarded within 15 days of receipt of
the data and  detailed report thereafter every 30 day a8 the Lavest-
UNCLASSIFIED 2 U-39552

DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
A
UNCLASSIFIED
3- U-39552

mubjest an abore.
It is Air Forge I peliey not to imore reporta f sightings
but to reeagidae that part of its
or
this
is deeired thnt the Afr that the Afr
Enteriel.0 ect aese purpe ect wose our
CECS COECS tirte
and and
notrued notr toom totomw
It is deeired thet epprepriate reed epprepriase reec
to this to thds Bodqartere, Beodqartere, wherever action io indlonted
mseh mseh falls eutaide the fleld of the the fleld of te Air Ertarlel Copand. Air Brteriel Copand.
h. I is suggerhed that the aetivibles of thts pao jeot h. in is suggerted that the aetivitles of thls pro jeet imeLude imeLude
the preperetion ad distribution of an indtial reper't, as reoorenended
in Imelowure l, and that eabeequent reparts be Lssued a  quarterly
baste. Supplemsmtary reporte should be isaued as mare fregmest tnter-
as should the naed for by indicated. This projeet is asgicne
slassificetion ofLer
There data of a classIie.tlea hrher Umn retrted
10 Madld by the projest auch deta sheuld be elasaified aesordingly
A complete interehango of data shduld be effuoted as reeamonded in
Inelosure 1.
B GOMAMD OF THE CHIEY F STAFF: DOWNGRADED AT 3 YEAR INTERVALS
DECLASSIFIED AFTER 12 YEARS.
Jil#3 DOD DIR 5200.10
L. C. CRAMIE
Mn jur Ceneral, U. S. Air Ferce
Director of Researeh and Devalopmant
from ANC to AC/AS-2 Offies, Deputy Chief of Staff, deterial
OFFICE SYMBOL UTPS LRODA
GRADE AND from AMC to AC AS-2
SURNAME OF (Com YoCounld)
COORDINATING
ORFICERS Maag dtd 19 Ded 047
UNCLASSIFIED OVENPTN IE
IP RER from Dik of Intell.w/2 Dals

.
A special study has been initiated with the Rand Project in
accordance with Air July 1948 to
present information to evaluate emote possi-
bility that some of the observe ips or
satellite vehicles.
Members of the Scientific Board the Chief of
Staff, USAF, have also suppliec
. capacity.
UNCLASSIFIED
11
S-11750

2 Qyo of Inadsures in n2 P1los
.
aee
.
APBIB-CO-S 1nt Ind
Depairtmons of the ALr Foreo, Mg. VsAP, Vashinghon 2S, D. O. der 1
T0I Comanding Guhoral, Air Katoriel Gonnend, Wright Nold, Daybon, Ohdo
ATTH: TSNAD-2B
Atteched herete is infarmtion requssted in bnsie
no
BY GRDER OF THE SBOR RARY OF EHB AIR PORGE: DOWNGRADED AT 3 YEAR INTERVAI
DECLASSIFIED AFTER 12 YEARS.
UNCLASSIFIED DOD DIR 5200.10
3 Inelss
OFFICE SYMBOL heeu fur kop AFBIRCO
GRADE AND 2 Fose far Coick Ag IatelDv Gol Tay l'er
SURNAME OF 2.0012
COORDINATING
OFFICERS Jummery of Ink Lt Col Gerrett

Reported Mghtinge of Flying Discs,
SUNICTI
TO Coranding General
Air Meterial Comnand
Wrloht Flald, Deyton, Chio
Attention: 7-2.
verbally with Mr. Loedding, incloeed is the
Ls arranged Offiee on reported sightinge of
complete fue maintained by thie
Flying DLees,
Plo 15 forwarded 8o that photostate may be mede in
2. This duplieate est of these sightings.
ender to previde your Coonand with
this material for your pargose, 18
3. then photestating for thie offiee and returned
be approeiated if one extre eet is aade
at the same time the eriginals are returned.
This file, and the dupliestes, should be returned
Heedquarters, Attentions AG/AS-2, ALT
ao poosible to thie
mente Division, Collection Branch.
BY OCAGLAND OF GINERAL SPAATZI
ON
Inel
a/in SAAS
par. l.
Epr
.
DOWNGRADED AT 3 YEAR INTERVALS;
ace DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
S
N
cort UNCLASSIFIED -CUNFIDENTIAL
OFFICE BYMBOL "AFRIR-C
GRADE AND Col.Tavlor Sird 6
SURNAME OF
COORDINATING
OPFICERE Lft.Col.Carrettl 10-00-9g.8. a0071T1 C

Washington 25, D. C.
ATTN: AC/AS-2
Major Ogneral George MoDora ld
tion, this date, l. In compliance with General
herwith is to Colonel H. K. MeCoys McDonald'e telephone
deeigated coPy of a drawing entitled, T-2, Hq. AMC, attached conversa-
LD-2 Because "Loedding Flying Disc"
'ted that record be kept of all of patent rights involved,
Wtnessing with sigatures and persone reviewing itis: reques-
dates directly on the thie drawing by
2 This drawing should drawing.
has served has served its purpose be returned to this offics when it be returned
Of fl ce Hq. MC for so that it can be to this office when it
official record. record. turned over to the Patens turned over to the Patent
melosed relosed X4 4521 Aiplanes Ciplanes
AlreratI Mreratt Establishment, herewi th is also a report herewith is also a report muc muc
the Horten Establishment, Technical Technical Note, Note prepared by the Royal
which10 tetllemnadreraft The AERO 1703, which describes )
spective considered significant in following references
Seucer" thinking and relating the Horten are invited
case: accomplishments toward the brothers per-
alleged "Flying
Page 5, Paragraph l and 6.
b. Page 6, Paragraph 1 and 7.
.
Page 26, Paragraph 3 and 10.
d. Page 27, Paragraph 12.
.. Page 28, Paragrophs 1 through 5.
fo
Page 54, Photograph of Horten "Parabola
DOWNGRADED AT 3 YEAR INTERV
DECLASSIFIED AFTER 12 YEAR
UNCLASSIFIED DOD DIR 5200.10
att#s BEDRET
/ 2
COPY U-39942

UNASSIFIED
COPY
Baéic 1tr, dtd 2h Sep 47, to C0, Hq AAF, Wash, subj: "Flying Disc
g. Page 69, The Horten VIII.
h.
Pages 71 and 72, Photographs of the Horten Ⅲ
1. Versions.
Page 74, Drawing of the "Parabole".
This document should
purpose. also be returned when it has served
ita intended
4. ×452.1 Cuplane Cusi
dated recent report
9 June 1947, indicates from the U. S. Military atbache
based on the Horten VIII that ls00 afreraft, direetly Moscow, USSR,
of 131 feet and a design (o1x engine pusher, or indifrectly
pounds) grose weight of approrimately having 'a wing spread 1
however, being built for bomber squadron thirty-three thousand
V-32291 jet propelled, reference.report use The Russiant version,
-8 identification
NO.
5. The T-2 report "German XO 95
Mo. F-SU-1110-Md, also inclosed Flying Wings Designed by Horten.
if desired. herewith, may be ntained by Brethera..
your office
FOR THE COMMANDING GKEERALI
H. M. McCOY
DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10 C
<m
UNCLASSIFIED
SECRET
-2-
COPY U-39942

HaAMC Nd. Tod14 (ov 10.Sop 46) 0 W-4 JAN 47
UNCLASSIFIED SAVE
SEORET
HEADQUARTERS
IN ROPLY ADDORSS BOT AIR MATERIEL COMMAND
COMMUNICATION AND
VELOPE TO COMMANDING
OINERAL AM' MATIRIN TSD IN/HMM/1g/6-4100
COMMAND, ATTENTION
FOLLOWING OMMCE SYMOL WRIONT PIELD, MAYTON. ONIO
TSDIN UEC
SUBJECT: Flying Dsce D0019,1947
TO: Chief of Staff
United States Ar Force
Washington 25, D.C.
ATTENTION: Directer, Research & Development
Major General L. C. Craigie
1. conrlrung coere Confirming the recent conversation of he undersigned with
Majot General L. C. Craigle, 9 L.C. Craigle,9 December 1947, attached December 1947,attached as listed below
are coples of coples of the reporte from the reporte from this Headquarters concerndng this Headquarters concerndng Flying Flying
Discs. Discs.
2. Comments of Headquarters, Air Headquarters, Air Force on these Force on these letters letters have
c) C) never been been recei ved by recei ved by this Command. Continued and recent reports
from from qualified obeervers concerning this phenomenon •tll •till makes thie this
matter one of concern n to to Headquarters, Air Materiel Command. Command. Intelli-
gen'ce gen'ce Department of this Department of this Command is continuing the collection and
7.7 analysis of all available reports.
FOR THE COMMANDING GENERALA
H. M. McCOY
Colonel, USAF
Chief.of Intelligence
2 Attachs
0 ee ltr to CG, , dtd 23 Sept L47
subj "AMC Opinion Concerning
*Flying Discs"n
. ce ltr to CG, AF, dtd 2 Sept L47
subj "Flying Disce"
DOWNGRADED AT 3 YEAR INTERVALS:
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFIED
SEORET
bel 3 U-53791

Wright
24 Sept 47
TSKAD-23
"nlying Suncere' 15 2
Comanding General, Army Air Foree, Woehingtos 28, 0.0
ATTEI A0/AS-2, Lt Gol Carrets
X001.9.
It ie requestsd that this offiee be furniehed all/avaflable
infermation cencerning an alleged "ylying Sancer' flight sighting
made by a radar station in Japan. Thi incident was mentioned ) by
Dr. Charles Carrell during a conference in Brig Gen Sehulgen's
effiee attended by Mr. A.C. Loedding. B-g representative, on 5
September 1947.
POR TRE COMVANDINO OWERALI
DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.1Q
UNCLASSIFIED SEORET

WN
DOWNGRADED AT 3 YEAR INTERVALS
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
yo
CONFIDENTIAL-
UNCLASSIFIED
cont
OFFICE SYMBOL APTAI
SURNAME'OF GRADE AND
COORDINATING OFFICERS A
18-9UD2-8 8. 8. ODVCRUBENT PEENTINS OF7ICE

SEORET,
UN LASSIFIED .
COPY
O1
TSDIN/HM/1/6-4100
TSDIN 23 September 1947
SUBJECT: AMC Opdnion
Concerning "Flying Discs"
TO: Comaanding. General
Army Alr Forces
Washington 25, D. C.
ATTENTION: Brig. General George Schulgen
AC/AS-2
1. requested by AC/AS-2
opinion of this Command there is. presented below the considered
opinion is concerning the so-called "Flying Discs".
Opanion 18 based based on on interrogation report caledhing data Disce" This This
preliminary studies atudies by personnel furnished by by AC/AS-2 and
ing Dvsi Divisi on of T-2 T-2 and ireraft Labora
T-3. This opinion was arrived tory, Engineer- Engineer-
personnel from the Alr Institute at in a conference betwen
Chief of of Technology, Intelligence
Engineering Division, and the Arcraft, T-2, office, Office,
Laboratories Labora tories of Engineering Power Plant and Propeller
Division T-3.
2 2. It is the opdnion thats that,
or fictitious. The phenomenon reported is something real and hot visionary The phenomenon reported is something real and hot visionary
be There are objects probably
disc, of such appreciable size as to approximating the shape of
aircraft. appear to be 88 largeas mn-made
There is a possibility that some
caused by natural phenomena, such as ofthe incidents may be
meteors.
d. The reported operating
rates of climb, maneuverability characteristics such as extreme
must be considered (particularly inroll), and action
craft evasive when sighted or contacted which
and radar, lend belief to by friendly air-
are controlled either the possibility that 8 Onaa of the
manually automatically or objects
remotely.
The apparent common description of the objeets
fellowss
(1) Metallic or light reflecting surface.
DOWNGRADED AT 3 YEAR I INTERVALS;
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFIED
. 2ece -SEORETI U-39552
COPY

Opinton Con-
Banié Lar fr Co, A, to CJ
ceraing "Flying Ulacs".
Absence of trail, except in a few instances when the parfor
(2) object apperently MAS operati ng:undar hi gh
mance conditione.
or elliptical in shape, flnt en botton and
(3) Cireular
domed on topar
reports of wall kmpt formation Clighse warytng
(4) Several from three to nine objects.
Normally no associated scund, except in three instances
(5) subotantial runbling roar was noted.
Level flight speeds norially above 300 kmote are enti-
(6)
mated.
the prenent U. S. knowledge. -- pro-
f. It is posaiole within in undertaicen - to conetruct:a
ridad extensive detailed development deseription of the objeat ih sub-
piloted aireraft which (e) ubove whd ch would be capable of an approximate range of has the general
paragraph at eubsonic spenda.
7000 mles along the linei indicated
€* Any developments in this country and at the eutsiderable ex-
be extremely expensiw, time consuming directed, should be set up in-
would of current projecte and therefore, if
pense dependently of existing pro jects.
consideration muat be given the followings-
our domostic YEARS.
DECLASSIFIED AFTER 12 DOD DIR 5200.10
3. It is recownended that:-
Air Forces iasue a directive assigning of
lieadquarters, Army and Code hame for a detailed study
a priority, security classfrication preparation of complete sets of all available
matter to include the will then be mace available to the rmy, Navy,
this pertinent data which Group,
and Comaission, JRDB, the Air orce Scientifie Adviscry
Atomio Energy and NEPA pro,jecte for comments and reoommendations, receipt of
NACA, and the RAND to be forwarded within 15 days of the investi-
with a proliminary report thereafter ewery 30 days as
the data and detailed report.
UNCLASSIFIED SEORET. U-79552

DOWNGRADED AT 3 YEAR INTERVALS DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFITO

111 UNCLASSIFIED
S-11750

TO: Chief of Staff
United States Air Force
Washington 25, D. C.
ATTENTIONs Office, Director, of Intelligence
Lt Colonel Georg Garrett, Jr.
Reference letter, subject as above, dated 1 18 November 1947, it is
requested that immediate action be taken to appropriately mark or stamp
this correspondence with the classification secret" This classifica-
tion number is as followe: U-48985
FOR THE COMMANDING GENERAL,
H. M. MeCOY
Colonel, USAF
Chief of Intelligence
CONFIDENTIAL
DOWNGRADED AT 3 YEAR
DECLASSIFIED AFTER 12 INTERVALS;
DOD DIR 5200.10 YEARS.
F-L-29 AP 46 300M UNCLASSIFIED

SUBJECT: Flying Dises.
TO: Chief of Staff
United States Air Force
Washington 25. D. C.
ATTENTION: Office, Directer of Intelligence
Lt Colonel George Garrett, Jr.
to AFCA1)
veu 1.. The inclesed newspaper olippinge
tiom and comment. The inoident are aubmitted for your inferma-
Journal" on 12 November 1947, reperted in Seattle appeared appeared in In the the "Daytom "Dayton
Jourmal" om 12 November l947, and should be follewed nd should be follewed up ir possible,
2 The story 2. The story by Lionel 1 Shapire regarding Shapire regarding
Spain evidently wasI printed in a printed ina war weepons weepons developed i
the country number of leading newepapers nowepapers thr oughout
tain tain •ssential essential The ignificance of this artiele will The ignificance of this artiele will be dependent
elemente for such alleged lemente for uch alloged important upon oer-
funds, materiala, experimental testing materials, experimental testing important developmente, devolopmente, such AB aB
"lonow-how". The latter is fadlities, and technologieal 000.9
The The The latter ie supposed supposed to be supplied by supphied by German scientists.
German soientiete at this Hq indicate that soientiete at this Hq indioate that
from Gormany are working in Spain, and the no important scientiats seientists
are not known to them. not Gormany are working in Spain, and those hentioned in mentioned in this artiole this artiole
known to them
3. If possible, therefore, an effort
should be made to obtain names,
German qualificatians, or amy informition that might help to identify the alleged
scientists working in Spain.
brief statement as mde in a reoent intelli gence
Hq, USAF. AC/AS-2, regarding flying diso incident report from
The close range in Alasl September.
than dighting reported should render more detailed
what wAs reported, which also suggeets follow-up.
5. It is further requested that this offiee be adwieed
being made on the plotting of all flying to progress
larly in North America. dise ineidents to date, partiou- due
It wa u understeod that Dr. Carrell was going to
plot these incidents, but no further word was reoeived regarding thie
of-
FOR THE COMANDING GENERAL:
File DOWNGRADED AT 3 YEAR
CD GAAAST DECLASSIFIED AFTER 12
nol H. M. MoCOY DOD DIR 5200.10
newspaper olippings Colenel, Ain Corps YEARD LS
UNCLASSIFE SEGRETI Intelligende
44
-

d .
TITLE Project Grudge
PROJECT xS-304
AUTHORITY Hq, USAF, Deputy Chief of Staff, Materiel, Wash-
ington 25, D. C. letter, dated 30 Dec. 1947.
PRIORITY 2A
SECURITY Restricted
PROJECTI ENGINEER Lt H. W. Smith
PURPOSE To collect, collate, evaluate and interbret data
obtained relative to the sighting of unidenti-
fied flying objects in the atmosphere which
may have importance on the national security,
and to control and effect distribution of all
objective information as requested to inter-
ested governmental agencies and contractors.
ESTIMATED COMPLETION. Continuous
PRIME CONTRACTOR None
THIS MONTH; The Project Grudge Technical Report incorporating results of
study has been completed and submitted to Hq USAF for coordination.
The number of reported sightings continue to exceed the
normal monthly average
Under a contemplated revision of policy, Project Grudge
would investigate only those incidents. in which realistic technical ap-
plications are clearly indicated. (RESTRICTED)

on 14 Nov 57 I called Miss Snoddy, who 1s
Chief, Administrative Reference Branch,
Mail and Records Management Division, Air Adj Gen
Office, Hq USAF (extension 74835). AFCAG-22.
Miss Snoddy is trying to locate letter from
c/s,USAF, dated 30 Dec 44, subject: "Flying
Discs".
Gam ov
Co nucted dat fo 1944 to Co nected dete fr 194 7o
1947. Ft
Moterdl
tp th
caller at.1430 18 07
Ts So iean Line
ane
to  y.
ite to
e a cto not
I ae 1Shov 51.
Th we  g Ne/m

S-11750 arcier
toe to word fr grien t mr
Conguessiond

cheobed by tho Intelligonoe artmont Conmand. Those oheoks
arousually made dir Projeot "SIGN ffice, MCIAxO-3. These
cheoks are distinot flights mado by
weather sorvice stations of the Air Force Dopartmont
of Commerce. (U. S.. Moathor Bureau) req
inoi-
.

AFOIR, Hq. USAF
Capt Trakowski, Geophysios Lab .
Major Kodis, WCREEP .
Colonel Heal, MLAMS ol

b. falling bodies:
#,5,6, 12, 13. 14
108, 109, 1 21
a. Kiscellancous atreamer to.)
39,89, 231, 234.
. ..

1. Flying disks, i. very low aspec ratio aircraft.
2. Torpedo or ciga no wings or
fins visible n flight.
3. Spherical or balloon-shap
4. Balls of light 1
darify the projsc nature.
UNCLASSIFIED

UNCLASSIFIED