A404 ALO
First Shot on
May 15
-
.
Ye
\
ae
.
:
4
J r
VS
\
|
Sa
~
20% cover of cumulus clouds at 5 to
.
, ang dd
-Be29 comes in at $0,000 ft, drops bomb ¢.0 miles before
curvature.
The bomb explodes 49 seconds later.
The
is jolted as in heavy flak by between .15 and .20 psi.
~
(.55 psi considered safe)
The explosion itself is very normal in most respects.
As far as blast pressures are concerned one can,scale from
a l pound charge all
distances multiplied by W/% and all
times multiplied by W+/%.
Gs
'
_
SPR
BOX No
.
Mking
plane is than 10 miles away in total distance and plane
fos A
COLLECTION
from east Pree,
yaves on lagoon 3 feet height
reaching target, makes 100° turn with 5 mile radius of
Blast
REPOSITOR
huntaateeass
hind 18 Me Pe Ne
YY
.
\
ke
\
,
f
temp 80°
7
\
.
10:30 A.M
Ss
‘
\
~
-
A normal blast damages structures
by its impulse, the atom bomb blast damazes by virtue of the
pekkpressure. Its duration is of the order of 0.5 to 1.0
geconds which is much longer than the natural period of
ustitiation of most structures. Because of this long
duration, it is not safe to extrapolate physiological effects
from-normal blasts.
ie expect 20,000 tons TNT energy yield.
ceeKiteon CKOsS@ond£
Shock
over
pressure
(psi)
Horizontal
Time
Distance
{yds )
Remarks
(seconds)
50
400
4
10°
900
1.25
Pressure still very high.
shock well formed.
Limit to A damaze for reinforced concrete
5
1350
2.4
8
1900
Ze5
2
2500
505
SS)
o O82
6800
35,000
|
Marvinal Distance for killing people by blast,
also for collapsing battleships and blowing
in portholes.
Suction phase of
structures.
;
Limit of A damace to weak structures, B to
strone structures.
Limit B damace to weak C for strong structures
19
Limit house windows would be blown
90
Gentle breeze and thunderous rumble reaches
spectators.
v