Project Sign Progress Report, 1948

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2 3 APir 1948
over 10
9
•
..
AMC
Subject, Project "SIG!i"
e. »umber of objects per aighting,
Objects per sighting
l
2-6
6-10
Number of eightioga
77
21
8
t. Exhaust traile were reported 23 times.
g. Speed has been eetime.ted throughout the entire range from
very alow or hovering to supersonio.
6. Incloaures 2 and 5 are anlargementa of photographt taken of
Incident f40o
Inoloaure 4 1s an evaluation of inolosure 2 by thie
Headquarters. Attention 1s iovited to the marked aimilarity between
incloaurea 2 ands. and inoloaure 6. Similarity also exiata between
inclosures 2 and 3 and oonfigur&tiona illustre.ted in inolosure 6.
7. Representatives from tbie Headquartere visited Dr. Ining
Langmuir of the P~sea.rch Laboratories. General Electric Comp&ny.
Schenectady, N. Y. to discuss Project "SIGN". It was the opinion of
this acienti st that prosent a.vai l!I. ble data does not encompass suffi­
ci ent information to enable a positive identific~tion to be ma.deo
Dr. :.a.n&muir was relucts.nt to consider the so-called "flying discsM
as a reality. However, it io be'lieved at this neadquarters that it
is possible to oonstruot a low aspeot ratio airoraft that would d~pli­
oate many of the appearance and performance oharaoteriatics of reported
"flyint discs~. Experts have agreed that thie would be possible through
the intelligent application of boun:lary layer control.
FOR THE COMMANDING GENERAL:
~Me~
6 Inols
H. M. ticC~!1. J
l. Tabulation
Co lone1. US&F
2. Photo
Chief ot Intelli gence
3. Photo
4. Eval of Incl 2
6. Horten Parabola
6. Biology of I'lying Se.ucor
2
~
NND 927545