PROJECT BLUE BOOK

PROJECT 10073
1. DATE 2. LOCATION 12. CONCLUSIONS
0 Was Balloon
16 Oct 55 Cheyenne, Wyoming 0 Probably Balloon
4. TYPE OF OBSERVATION 0 Possibly Balloon
3. DATE-TIME GROUP
Locai Local Ground-Visual Ground-Visual Ground-Radar 0 0 Was Aircraft Was Aircraft
0 Probably Aircraft Probably Aircraft
GMT 16/2000 MST 17/03152 GMT 16/2000 MST 17/03152 AirVisual Air-Intercept Radar 0 0 Possibly Aircraft
5. PHOTOS . SOURCE 6. SOURCE 0 0 Was Astronomical
Yes 0 0 Probably Astronomical
civilian 0 o Possibly Astronomical
No
7. LENGTH OF OBSERVATION |8. NUMBER OF OBJECTS NUMBER OF OBJECTS . COURSE 30 Other Locomotive Other_Locomotive
00 00 Insufficient Dota for Evaluation Insufficient Dcta for Evaluation
45 seconds 45 seconds 1 NE to SE Unknown
0. BRIEF 10. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
Blue lighted disc. Sound like electric Deisel locomotive sound locomotive sound generated
motor. moto loops. sighting. Other details sighting. Other details attributed to
overactiv imagination.
(SEE CASE FILE)
)
ATIC FORM 329 26 SEP 52)
.

:.
(CLASSWCATION)
AINALKGENCE REPORY
,- RECST NO.
tii HqS-IFOB-2-55 PAGE 7 OF 7 PAGES
COMMLENTS of Approving Cfficer:.
Conour with the cpinion of the Preparing officer that no cbject actually
existed and that the sound heard by the SOuRCES was that of a Diesel loconotive.
Jnw
-
1
4
:-
MOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 5O U. S. C.—
3I AND 32, AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZFD PERSON IS PROHIBITED BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF.
T77* PNNO61

VAILABLS
7. VOTWT AD WIDS-ALOFT COIDITI' AT TIE AND PLACE SIGNTING:
6 CIEAR UIL
0 3 SH. FAOD s s9aS KT
5 DEG KT
+-1 1) 1 DE6 12 KT
16 34 DEG 4: KT
2120 340 DEG 25 KT -
3100 35 DEG 45KT -
5000 DEG KT
DEG KT -
CNONE NONE - (
D UNK
EO
FNE
S NONE
9 NONE
Le UNK
1I DC MUELIER CLC OFF LRYFS
12 1 NONE
ET
17/8619Z OCT RJIFAM

18
/ult 155074
016
VPF 29 YMA 22 WYA 1s WD 13ANA 13-
RJEDEUAJIPEU AJDUP RJEPHN 4x2a
'! it
DE RJWFAX ID 4
Y 17 S19Z -
FN LOVRY FLIGHT SERVICE CENTER LOURY AFE COLO
RJEDEN/CNDR ADC ENT AFB COLORADO
RJUPEU/CNDR 29TH AIR DIV (DEF)
AJEDUP/OIDR AIR TECHNICAL INTEL CEN VRIGHT PATTIRSON AFD AJEDVP/CHDR AIR TECHNICAL LCIN VRIGhTPAITSJN ATE JH OHIO
RJEPHA/DIR OF RJEPHA/D INTEL HQ USAF INTEL HQ DC
ET
L. DESCRIPTION:
A UNK B 1 UNK BLUE D ONE F BLUE LIGHTED DISK H LIKE LUE D ONE F BLUE LIGHTED DISK H LIKE ELECTRIC MOTOR
2. DESCR OURSE C
A NE TO SE B HADE COUPLE OF LOOPS C NONE GIVEN D COUPLE OF LOOPS CNONE GUVEN D COUPLE F LOOPS
3. HANNER OF OBSERVATION:
A GROUID VISUAL B NONE
4TIME AND DATE OF SIGHTING:
A 123 Z 15152 B NITE
5. LOCATION OF OBSERVER(S)
CHEYENNE WYO.

PART TWO: Description of sighting
- Cheyenne, Wyoming.
Fani Tuissg Suppie - • Ellolvo•
PART FOUR: COMMENTS of Preparing Officer. PART FOURI COMMENTS of PrepaRing
II.S II. SUMMARYI SUMMARY: One unidentified flying object sighted six miles west (CecRef sighted six miles west (CeoRef
FJAM Oh07) of Cheyenne, Wyoming, at 21/0315z FJAM OhO7) of Cheyenne, Wyoming, at 21/0315z Ootober 1955 (2015MST October 1955). Cotober 1955 (2015MST 00tober 1955).
The information contained in this The information contained in this s report was s report was obtained from the persons sighting
the objeot and from an investigation conducted to determine the cause of the the objeot and from an investigation concucted to determine the cause of the
sighting.
III. INVEST TOR: 8/SCT RONALD D. DE OR: B/SOT RONALD D. DERU F1C F15
WILLIAM A. —
WILLIAM A. THRASHER THRASHER
Major, USAF
Operations lcer
APPROVED:
mfil
INCLS. M WHITE JR
Colonel, USAF
Commander
DISTRIBUTION ATOR
-
MTCLLICTNCE, USAN.
UNCLASSIFIED 10-833n0-2 U. 2. EUTLENMENT PRINTiNG OPPICE
(CLASSIFICATION)
9
I

3 the questions of the investigator is a commercial airlines
pilot and claims thorough knowledge of the configurations and flight characteristics
of most aircraft. The description sighting obtained telephonically prior to
the personal i s highly gerated compared to the description obtained
by the personal interview. Upon questioning, the SoURCE gave many conflicting
statements of the events of the sighting. The SOURCE tended to emphasize the more
spectacular aspects of the sighting and has an imagination. The SOURCE
needs and wears very thick eyeglasses, which were not worn at the time of the
sighting. SoURCE is considered to be of
. III. SOURCE'S DESCRIPTION OF SIGHTING:
1. Sunday, 16 Cctober 1955, at 2000 hours, Mountain Standard Time, SOURCE
and companion, Mr. were poaching for deer meana of. a spotlight
mounted on Mr. automobile. SouRcE and companion spotted, shot, and killed
a deer. Both men then proceeded up the back road for approximately one-half mile.
2. Returning by foot to the ravine in which the deer was shot (GeoRef
FJAM Oho7), SOURCE and companion searched for the deer. While searching, Mr.
outlined sharply against stars. Although the SCuR CE could not ascertain the
shape of the object, he stated it was approximately the size of an automobile and
50 to 6o feet over his head. He described the object as being a "dark glob of
material with no lights or illumination". Mr. stated that he was of the
opinion that the object must have come from over cheyenne and was heading west at
"tremendous" speed, faster than any jet aircraft he had seen.
3. SOURCE stated that the noise of the hject rowned out sound of
a bi-motored aircraft passing overhead.
4. Mr. heard the whining of the object ror an estimated ten (lo)
seconds and saw the obj:ct for five s.conds. The SCURCE estimated the time to
be 2015 hours, 16 Cctober 1955.
5. After the object had pasned Mr searched the area for the deer
he had killed but could not find it. ScuRcE ves -wrbatic in the belief that the
disappearance of the animal was directly attri Ibutable to the object he had observed
NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENS! OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 5O U. S. C. —
3I AND 32. AS AMENDED. ITO TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUITHORIZED PERSON IS PROHIBITED BY LAW.
IT MAY NOT BE REPPODUCLO IN VNOLE OR IN FART, BY OTHCR THAN UNITID STATES AIR FORCE ACUNCICS, EXCEFT BY PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF
UNCLASSIFIED
(CLAISHNICATION) 70  U.2. PU-SNENT PONTING MYICY
a

FROM(lgnCy) REPORT NO.
H1S, L602d AISS Hqs-UFOB-1-55 PAGE 3 OF 7 PAGES
I. SOURCE:
Address: Cheyonne, Wyoming
Ago: 23 yeurs
. Occupation: Heavy equipment operator
Education: 12 jrears
Quelifications: USMC, 2 years
II. RELLABILITY: SOURCE may be considored due to many contradictory
statements, continual reference to the object as a "ilying saucer" and self-adnit-
tance to being a "saucer enthusiast". SOURCE stated he knew the characteristics of
"saucers" from science fiction literature and mi SOURCE continually
answered questions, "as said... indicating the amount of
influence held 1 by the SCURCE in PART CNE and luencing. factor of talking over
the sighting betwsen themselves. SOURCE origin SOURCE or reported that he had seen the corted that he had seen the
object as well as heard the sound of the objecr but upon questioning stated that he object as well'as heard the sound of ne objecr but upon questioning stated that he
had heard the ob ject only. SouRce had noted nany contrails over the Cheyenne area SouRcE had noted nany contrails over the Cheyenne area
on the days immediately following his sightirg and was certain that this was Air Force
B-47 activity hunting the object he had sighted.
179
III. SOURCE'S DESCRIPTION OF SIGHTING: III. SOURCE'S DESCRIPTION OF SIGHTING:
1. 1. SoURce's description of the object paralleled that of SoURce's description of the object paralleled that o
with the exception of the following with the exception of the following iteme: items:
SOURCE heard the whining sound of the objec period of forty-
five (45) seconds, but did not see the object.
b. SOURCE glanced at his watch immediately after the object passed over
head and noted that the luminous dial of the watch was glowing brighter than he had
ever seen before. SouRcE attributed this phenomenon to radioactivity from the object.
SOURCE noted that the time was exactly 2ol5 hours but stated that his watch might have
been five mimutes fast or slow.
c. SOURCE stated that the sound sity, was tha
four to six B-l7 type aircrart on take-off.
HOTE: THIS OOCUMENE CONTARN INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WPTTHIN THE MEOWING O/ THR SPIONAGE ACT, SO U S. C.-
JIAND TL. AT ANLIPD. OS TRANTMISSION OR THE REVELATION OF ITS CONTENTS IN ANY NANNEO TO AN UNAUTHOL EY PPTCON IS PHOHIRITED RY LAW.
IT MAY NOT  DE "OUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FDNICE AGFNOIES, CUTL"TOY PERMIGSCION OP THE DIRSCTOR OF
INOTLIOLNOLUSAE,
UMOIIOCTAAO

of ·the sighting sometimes sounded "wierd"
I k. Scene of the sighting was visited by the investigator and Mr. W,
Al-
though the deer shot by Mr. purportedly rolled dowm a sandy bank of the ravine,
SOURCE.
5. Lt. Colonel E.L. Rogers, Deputy Commander of Civil Defense, State of Wyoming,
the time of the sighting.. He also stated that his-organization had received no re-
ports. of umusual-sounds or unidentified flying objects for l6 October l955. Colonel.
Rogers suggested that Mr. ins, an active Gec observer and rancher located two miles
north-west of Cheyenne, be contacted. Mr. was contacted and stated that he had
heard no umusual sounds or had seen, no umusual ilying objeats during tbe evening of.
16 October 1955.
6. Lt. Miller, Cheyerne Police I Department,. waa interviewed. Lt. MilJer stated
that no reports of ummsual flying objects or sounds had been received by his organi-.
zation. He further stated that his men on duty outside at the time of the sighting
had not reported seeing or hearing anything unusual during the evening of l6 October
recipient of the original report SouRCES, reiterated the verbal report
he received from the SOURCES. The description was comparable to the description giver
to the inrestigator with the exception that Mr. Morris had claimed to have seen the
object. Mr. stated that he referred the SOuRcES to the local Civil Aeronautics
Administraticn (CkA). Mr. Kalso stated that he did not give newspap
to the report because he doubted the veracity of the report.
9. Mr. William D. Olsen, CAA control tower operator r. Chevenne Municipal Airport,
reanization, Was inter-
viewed. Mr. Olson stated that he interviewed the SouRci prepared original
4
MOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIOINACS APT, 5O U. S. C.—
3I AND 3, AS AMENDED ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHBITED BY LAW.
IT MAY NOT DE. REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION CF THE DIRLCTOR OF
INTELLIGENCE, USAF.
- UICLASSIFIED
(CLASSIFICATION) 16-8:570-1 U.S. COVHNMLHT *MNTIN:O+ICE
>

trains on the evening of the sighting. Investigator was informed that train mumber
#7 had departed Cheyenne, heading west, at 2005 hours, 16 October 1955, and had
passed approximately one and one-half miles south of the area of the sighting at the
time of the sighting. The investigator was referred to Mr. Sherman, Special Agent,
Union Pacific Railroad, for further information.
'12. Mr. Sherman, Special Agent, Union Pacific Railroad, was interviewed. M..
Sherman verified the fact that train mumber #7, engine mumber 987, passed approximatel
one and one-half miles south of the area of the sighting at X2 hours, 16 October
1955. The investigator was further informed that the en 1955. The investigator was further informed that the engine os ine train number #7 wes.
composed of three units, each unit containing two Diesel-electric engines. composed of three units, each unit containing two Diesel-electric engines. Mr. . Mr.:
Sherman stated that trains heading west out of Cheyenns are forced to apply fuli Sherman stated that trains heading west out of Cheyenns are forced to apply fuli.
power to negotiate the steep climb to the surmit of the mountains west of Cheyerne. power to r negotiate the steep climb to the surmmit of the mountains west of Cheyerne.
It was learnsd that the sound of six Diesel-electrie engines with full power applied
would carry for many miles, especially in the sould egneoioll7 in the mountains and with a wind supporting mountedne and wdthe tdnd
the sound waves.
l4. Mrs. Georgia Bassett, U.S. Weather Bureau, Cheyenne, Wyoming, was inter
viewed, I Investigator was informed that the surface winds in the area of the sighting
were from the south south-east at two (2) knots and that the sky was cloudless at
the time of the sighting. Ceiling and visibility was unlimited except by darkness.
-
NOTE: THIS DOCTHIVINT "OU M WNIFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 5O U. S. C.-
3 AND J2.A - AMENIED. I. TMI. TIGSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PFRSON IS PROHIBITED BY LAW.
IT MAY NOT   TEUPIMOOUCED IN WHOLL OR IN PART, BY OTHER THAN UNITED STATES AIR FONCE AGENCIES, EXCEPT RY PERMISSION OF THE DIRECTOR OF
INTELLIGFNCE.UA%
UNCLASSIFIED
(CLASSIFICATION) .(-PNHNCNTPRINTINSCFPICE
F

objeat had come from over Cheyenne but the investigator could find I no one who had
se i or heard such an object, leaves great doubt as to whether any object had
actually been seon.
I
6. Information received from Mr. Sherman places a Diesel-electrie Locomotive,
containing sixI Diesel-electric enginss under full power, cne and one-half miles
south of the area of the sighting at the time of the sighting.. I Information received
from the Cheyenne Weather Bureau indicates that the surface winds from the south
south-east would have acted as a sound carrier of "whining" of the Diesel locomotive
passing to the south at the time of the sighting. The cool evening air and the
topography of the land would tend to accentuate the sound of of the locomotive.
7.  Both SOURCES described the sound emitted from the object as being similar
to a turbine, a sound very
8. A local rancher stated that the Union Pacifi the south
sometimes sounde
diserepancies in the SouRcEs' stories, the fact that both
SOURCES have overactive imaginations, and the data and conclusicns drawn above, it is
herewith submitted that no object actually existed and the sound, being built up in
the imaginations of the SOURCES, was in reality that of the Diesel locomotive passing
to the south.
Wit
WILLIAM A. THRASHER
Major, USAF
Operations er
NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 5O U. S. C.—
3I AND 32. AS AMENDED. ITS TPANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.
IT MAY NOT DE REPPODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF.
. UNCLASSIFIED
(CLASSIFICATION) 16 -88570-1 U. 3. SOVENNMENT PRINTINJ CSFICE