PROJECT BLUE BOOK

Inoidst
UNCLASSIFIED .
o 12 Nov 48
AHO. a tONrtotCl:rk AFB, Phillipines
UGAF SOP
Hoteen Axoa tioy Suot-ahitd
Sastet 2sh ds:
Afrirvok_3-6 miles
Circled LMC OP TIN ORERVED

forwarded by mail."
AFTER 12 YEARS.
DECLASSIFIE

I. Attached message was received from FEAF pertaining to a sighting of an
unidentified aerial object at Clark AF Base, PhiIlipina Islands at auproximately
te
2.  It is:requested that' the-configuration described in this wire be analyzed
for aerodynamic feasibility. -Comments should-be referred to MClAXD-3.
Sillit
1.Incl C.A. GRITILH RRS/aw
Wire d/Nov 26.z. Chief, Operations Se Section 6-5310
Tech Intelligen vision Bidg 238
Intelligence Department
HSIAXO-3- 6 Dec 2
1: The aircraft configuration described in the attached message is unusual because
f the rring. Assuning the approximate dimensions
quoted are correct, the principal aerodynanic proolem encountered will be that of main- quoted are correct, the principal aerodyanic proolem encountered will be that of main-
taining trim, with tns apparent'center of gravity location approkimated rithout lmowledge taining trim, with tns apparent'center of gravity location approkimated vithout lmowledge
of the sizè and locatiors of tne power plants.
2. If no tail surface is present, as implied in the attached report, trim cannot 2. If no tail surface is present, as imolied in the attached report, trim cannot
in sll robability be maintained without swept wings on the airplane. Even with no tail in all robability be maintained without swept wings on the airplane. Even with no tail
surfaces, if the wings are sufficiently sveot back, the configuration is aerodvnanically Jeot back, the configuration is aerodvnanically
feasible."
3.' In an evaluation of the description, it is 3.' In an evaluation of the description, it is pertinent to cunsider that althongh pertinent
the distance and altitude of the aircraft could not be termined, the dimensions wera
estimated. Tith no reference object in view, such an estimation, withou nowledge of
the distance to the object observed, is virtually inpossible.
REB
N ualfa
1 mcl OHI H.ICEIL L Yir
-70
leoh Iatelligence Liyiaton Post lub
Iatellirence Department Blag
DOWNGRADED AT 3 YEAR INTERVALSI YEARS
2 DECLASSIFIED AFTER 12
DOD DIE 5200.10
F-L-18 MAR 43 2 Mil 50OM (CONTINUE ON OTHER SIDE)
20c

theory of lift) what do you estimate is the gross weight wich may be sumported at an
arbitrarily chosen stalling speed 0 miles per hour.
g. besic estimates of weignt and essumine problems
controllebility, stability, etc., to be within aerodynamic possibiliti
2: It is realized thet s some of these
but it is felt that they follow a more or less systematic form in satisfying intelligence that they follow a more or less systematic form in satisfying intelligence
requirements. Please forward to NCIAxs for answer of those questions which fall within
their jurisdiction and return to MCIAXO-3.
4
ASifi
rIncle C. A. GRIFITH
n/c Chief, Operations Section 65310
Tech Intelligence Division P202
Intelligence Department B.288
T-78630-A
(DO NOT WRITE BELOW THIS LINE) e
IT
1u020

less aircraft.
d. The appr ximate necess uthern
Manchuria would t 5,000 miles,
A range of existing. ines and aircraft,
f. It may be roughly estimated that the gross
300,000 16s C 'arily chosen data.
2. This R&R has not been
Comment No 3 have covered.
recommended that this t prob Pirst discussed verbally members of
this Section and MCIAXO.
4
wh
1 Incl JON H. MDH/ed
TTAR INTER Chisf, Airoraft Analysis Section 3-2270
DOWNGRADED AT
DEULSSIFTED AC: Technical Intelligence Dirision Bl 288
DOD DIR S20C.1O Intelligence Department P 210D
UNCLASSIFIED
206
WF-L-13 MAR 48 2 Mil 600M (CONTINDE"ON OTHER SIDE)
2aC

0
1

in enti-
fled Aeria jeet sighted over
a. Object WRS Clark Air
Torce DanA 00, on 12 Jo vember 1948.
b. Meather; alnd acattered. visa-
bility 30 Hortheast at
8, altimetery g93,
WNGRADED AT 3 YEAR INTERYALS;
Cbject sizhted: DOT DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
(1) Number: One (l).
3 (3) Shape:
90232 Sizet
(3) Iimataly
1t0 dses sina span.
1 UNCLASSIFED

as a eingle plane in the
(10) Exhaust erail:
observer said, "Is agosared to
B. After talking to Sat. Squadron Adiatant and Arot
Beregeant, the man's character and honeaty in this utatenunt ia questione
able. As tor evaluation, the whols atatament and report can be eval-
- ated as D-5,
FOR THE BNKRALA
/s/ R. . Weinzettal
UNCLASSFIED

miles hiah, wy Bstinates 77 30 miles
out of the clond If was broadside to are. just Sinates), as me
masian, low clowd, I got a clear view of Ip, head-on, Thero whe definitely ack into the
this objeet aix wing forw
first time. Bimea besidesbeforo If vent inte thn cloud to 3ay
90

DOWNGRADED AT S YEAR INTERVALS DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFIED
00252 206

TAIL SEEMED TO BE A
CONTINIOUS EXAU3T.
Un0232
T UNCLASS -
206

+
or wore? I
iliusions. The witness
san the osjeot intersittertly throu h olouds. it is not oloar whet.er
Such obsorrasieds, oy en untrained crinl Forta a dos-
ronely tnlike the faots.
: LN
calose R move syestfio insontion sonaer Lag 5ls indlemnt
carlot suy Whetnor
astrononical ex lanation is possials, or not. 12
UNCLASSIFIED
HESEOED.

A
LA33 90 AAPPOV
360N ONIM
AO OOE XO8DOT
1 1 - 3
14 111
1 4
MObddV
1900 11
DOWNGRADED AT S YEAR INTERVALSS
204 DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
CIISSVIONA
28

3,11, 22,41, 42, 53. 54. 73. 81 83, 91, 92, 113, 114, 115,
126, 131, 138, 141, 145, 155, 155. 157, 159, 160 161, 163,
169, 171, 173, 178, 180, 182, 188, 190, 194, 195, 196, 198,.
200, 201, 217, 222, 235 257, 239.
b. Rookets, flares or falling bodies:
44, 5, 6.
108, 109, 1
//

2. The incident sunraries 173 through 233 have been cheoked
against routlhe weather-balloon ascents made by tha Air orce, Navy
and feathur Bureau, Cocments based on this roview are inclosed.
3. It is regoumended
dentirled Aerial Cbjeota" hanged as followss Itam 13, "Direotion
of Flight of Objeot," should bo olarifiod so that wertioal and hori-
zontal motions are distinguished if possible, and so that motion is
spoeified as ths direction towards whioh the object appears to move.
"Rolative to Radar Settings" should irclude a statement of tho type of
radar aet used,
FOR THE VICE

-

Evaluation: D-5 - Set

110 (dirccted beam of light?)
1.2, Altitude of Objecti 3 to 6 miles high
(estinated)
13. 20 to 30 miles
14. Estimated Speed of Object: Faster than jet plane
15. Time in Sight:
16. Tactics: Base - no definite heading
horizontal flight - reconnaisance
17. Sound Made by Cbject(s): single roar
3 tapering wings to amall point
25. Summary of Incident: (over)
(See attached page)

1 ( 1943 NDY CS 14*?
.
DOWNGRADED AT R YEAR INTERYALS DECLASSIFIED AFTER 12 YEARS
EQA08 DOD DIR 5200.10
2
HA21 ROUTINE
RR JEQAB UNCLASSIFIED 1988 NOY 26
08:15
a8
F

INFORMATION ON FLYING DISCS UNQUOTE DATED TWO SIX FE EBUYARY ONE NINE
FOUR EIGHT HD ABLE DETA
11 OMM IRL ONE

AND BROKE OUT T BASE