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CHAPTER3
TEST RESULTS
3.1 MIKE SHOT
3.1.1
ee
Blast-overpressure Data
The basic peak-overpressure, iime, altitude, and slant-range data for Mike shot are given
in Table 3.1. Sample oscillograph traces are shown in Fig. 3.1, and the overpressure vs time
curves, as scaled from the original records and calibration curves, are plo.ted in Fig. 3.2. In
canisters Nos. 7 and 12 the blast-~actuated switch, which is intended to seal the pressure reference chamber,failed to operate. Tunis does not affect the peak-pressure readings since the
reference charabers are vented to the atmosphere threugh a sufficiently high acoustic impedance to give a time constant of several seconds. It does mean, however, that the later parts of
the overpressr.e vs time curves are referenced to a slowly varying, rather than a constant,
back pressure. At canister No. 7? the duration of the positive overpressure phase is short
enough that the apparent duration should not be greatly in error, but, because of the very long
duralion at canister No. 12, no quantitative estimate can be given in this case.
Table 3.1— PEAK-OVERPRESSURE, TIME, AND POSITION DATA, MIKE SHOT
Aone et
Peak overpressure (AP), psi
Canister
No.
Highrange
gauge
2
3
4
5
7
8
9
10
11
12
8."A
7.80
1.17
0.78
22.0
6.20
2.40
1.05
0.67
0.30
Lowrange
gauge
Mean
8.65
8.575
Off acale
7.80
1,14
1.355
0.75
0.765
21.95
21.975
6.10
6.15
2.46
2.40
1.08
1.065
0.59
0.63
0.26
0.28
Duration of
Arrival
positive
time
overpressure
(T), sec
(aT), sec
Altitude
(2), ft
Slant
range
(R), ft
7.93
8.84
48.43
0 74.51
3.63
11.15
29.61
56.29
85.06
142.46
12,950
13,440
15,500
17,450
7,050
7,950
7,300
11,900
11,850
16,000
21,130
22,790
72,110
103,640
13,180
24,740
49,180
980,760
112,450
174,230
20
6.07
7.57
11,15
11.49
3.21(?)
7.69
- 10.46
14.06
7.56
(?)
RESTRICTED DATA (MB SECURITY INFORMATION