ag be 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