PROJECT BLUE BOOK

PROJECT 10073 RECORD CARD
1. DATE

2. LOCATION 12. CONCLUSIONS
0 Was Bolloon
24 May 51 ChicagoIil O Probably Bolloon
3. DATE-TIME GROUP 4. TYPE OF OBSERVATION O Possibly Balloon
SO XK Ground- Vi sual 0 Ground-Rador : parle ta
om t__.25/0150Z = = 0 Air Vi suol 0 Air-Intercept Ruder |G Possibly Aircroft
5. PHOTOS 6. SOURCE O Was Astronomicel
DO Yes 1) Probobly Astronomical
OXNe Civilians 0 Possibly Astronomicolegont raf’
7. LENGTH OF OBSERVATION 8. NUMBER OF OBJECTS | 9. CouRSE | |2%% Other Probable a
O Insufficient Data for Evaluotion
/2H 12 = 15 min 1 E to N to W 0 Unknown
10. BRIEF SUMMARY OF SIGHTING 11. COMMENTS i
Cigar shaped object. Described as rockets Duration rules out rocket sighting.

with exhaust flame about a mile long, Blinking Probable a/c with contrall, Blinking
light in front going on and off. Object flew light and duration inaccordance with
from E for about 12 minutes turning west and | the analysis,

finally disappearing from sight. Estimated
altitude by witness 50,000',

ATIC FORM 329 (REV 26 SEP 52)

AFXOI 350.09 (28 May 51)
HEADQUARTERS TENTH AIR FORCE, Selfridge AF Base, Michigan

TO: Commanding General, Continental Air Command, Mitchel AF Base, New York
ATTN: Directorate of Intelligence

For your information and any action deemed necessarye

FOR THE COMMANDING GENERAL:

KC Pub (ag VlaX

1 Incl: V. E. Murphy
nfo Lt Gol, USAF
Air Adj Gen
Int 350.09 (28 May 51) 2a Ind 15 JUN 1951 ‘
HQ CONTINENTAL AIR COMVYAND, Mitchel Air Force Base, New York
TO: Commending General, Air Meteriel Commend, Wright-Patterson Air
' Force Base, Dayton, Ohio
ATTN; MCIS ‘

Inclosure 1 is submitted for your information.

i:

FOR THE COMMANDING GENERAL:

1 Incl; PETER T. MACY
n/c CAPT.USAF
331 Ar Adj. Gen,

Hq 5th aruy, ALFGE-I 350.05 Subject: Unusual Flying Object Over Chicago ,

ify | re

J

ORCCASSIFIED

HEADQUARTERS FIFTH ARMY

1660 EAST HYDE PARK BOULEVARD

CHICAGO {5. ILLINOIS

ALFGB-I 350.05 28 May 1951
SUBJECT: Unusual Flying Object Over Chicago

TO : Commanding General
Tenth Air Force
Selfridge Air Force Base, Michigan
ATTN: Director of Intelligence

Attached Summary of Information regarding above SUBJECT is forwarded
for your information.

te oe

1 Incd NNES RANDOLPH
S/I dtd 23 May 51 olonel, GSC
re SUBJECT AG of 8, G2

Disclosure of the contents of this

report to the SUBJECT cr to persons

not normally entitled to the infor-

mation, rcv La meds onty vren auth-

orized ty the .2 of £&, G-2, GSUSA,

or higher authority. Unauthorized

disclosure of this information will

be considered a violation of 3 Ate IN vA

AR 380-5, DOWNGRADE A i oe aye on 42 > wets

JDNCUASSIEIED

Sm ere

——_ - oa

UNCCASSIFIED

- tab ueraeszres AL
SLFOB-I 350.05 SuMMARY OF INFORMATION ‘aay 73 Way 1951
PREPARING OFFICE ‘eat is iS. 2 ae ;
AC of 3, G=2, Headcuarters Fifth ! 1660 E Hyde Park Blvd, Chicago 15, Ill.
SuaJECT CODE FOR USE IN INDIVIDUAL PARAGRAPH EVALUATION
OF SOURCE: OF INFORMATION:
UNUSUAL FLYING C8J°CT OVER OHIOAMOO | Usuyncuame.... 1.2. «© PrommyTA. ss se
PAIRLY REMIABLE . «© «© ee wo c . Ag. Se ae
WOT USUALLY RELJIAMIE . . 6 e D oo oa 6 4
Sk ee ee ae E CMPROBAMLE «+ « es ew cs owes 5
RELIABILITY UNKNOWN... . F TRUTH CANNOT BE JUDGED... . 6
SUMMARY OF INFORMATION ——— —-< os om: a
At approximately 1950 hours, 24 May 19451, Ur, Sipps, 3

b .——prep Portage Park, Chicazo, Illinois, and his uncle ir,
observed an wiusual flying object which appeared to be a cigar~shaped
rocket flying at approximately 50,000 feet. The sky was clear, and visibility
was perfect, The rocket had an exhaust of flame which wis about a mile long.
The front of the rocket had a light which blinked off and on, much like a flash-
light sending Morne code. The rocket flew in an easterly direction for approxi-
mately 12-15 minutes, It then to a northerly course, finally turning
west ond dt aring from sight. Urs, SM ( immu), o
neighbor of and several othar neighbors all watched flight of the
rocket for approximately thirty minutes,

WM notified wacone of this rocket because he assumed that it had been

seen by many people. He saw no notice of such a spectacle in the daily papers
ond finally called the HERALD AMERICAN on 23 ay to see if they could sive
sone explanation of the flicht. The HERALD AXERICAN stated that they had no

informa any such activity and advised“QMMM® to call Fifth Army Intelli-
genae, a ist Lt. in the Army Reserve,
sits of this
ifor-
ith~-
USA,
nauthuorized ek ah & weet En anv ALS
rmation will pownGn Dist et r mpR 12 YAKS.
. vislatioa of Dime OD D K I ma

i
Bm «

SEE

“GY Dist Comdr, 24th Dist OSI 5 PLS rae.
(1) CO, Tenth AF, Selfridge AFB, tich

2

WD" 568 7 stone on UNCLASSIFIED osama.

/

"0 CASE (INFORMATION 6.x) 29 May 51
SOURCE: MENZEL — WORLD OF FLYING SAUCERS DOWNEY, CALIFORNIA

Other Winged UFOs

During the era of the saucers, winged creatures were responsible
for many UFO stories. But winged creatures do not stay put, and
in flying away they usually take with them the evidence that the
alleged spaceships were actually only birds or insects.

One such incident occurred at Downey, California, on May 29,
1951. Late in the afternoon three technical writers for North Ameri-
can Aviation were standing outdoors chatting and looking at the
sky when suddenly they noticed about thirty glowing, meteorlike
objects moving in the east, about 45 degrees above the horizon. They
made no sound and left no trail. Emitting an intense electric-blue
light, the objects made fantastic right-angled turns and swept across
the sky in an undulating vertical formation, apparently covering
about go degrees of sky in about 25 seconds. The diameters of the
objects were estimated at 30 feet and the speed at 1700 miles an
hour [11].

Many persons concluded that the unknowns must be inter-
planetary in origin because, as Life magazine commented, no
natural object hurtling at such a speed could execute a right-angled
turn, and no known machine could fly so fast without making a
sound or leaving a trail. No one could quarrel with this statement,
but it has no obvious relation to the incident in question. Technical
writers are not necessarily trained observers, and these witnesses
had no way to make a reliable estimate of the height of the objects.
Without an accurate estimate of at least one quantity—true altitude,
true size, or true speed—the others are meaningless. The unknowns
were probably birds, but they could equally well have been butter-

flies, bits of paper, or merely ashes blowing over the two-story
building.