minute.
Theywere located at 5,000, 12,000, 14,000, 22,000, 23,000, and 25,000 feet.
Ring No. 3 was the only one to show a definite changein altitude (from 22,000 to 18,000
feet) though the sparse data from one film for rings No. 2, No. 4, and No. 5 indicated
that they also lost about 4,000 feet of altitude during the 0.2 minute period after the last
measurement on the remainder of the films.
meter and main skirt with time.
6.4
Figure 6.11 shows the growth of the dia-
SHOT 5
Diameters of the stem and the one be]l visible on this shot are shown in Figure 6.12
as functions of time. Height of the bell could not be determined reliably. Figure 6.13
TABLE 6.1 CASTLE CLOUD DIMENSIONS AT 35,000
FEET TO 50,000 FEET ALTITUDE
.
Shot
Shot 1:
Shot 2
Time ~
Minutes
Shot 5
.
Shot 6
Stem Width
Feet
20 (ALD~11)
=: 35,000
80,000
4in main cloud)
20 (ALD—10)
35,000
60,000
39,000
44,000
‘28 (ALD-.10)
36,000
80,000
$6,000
$2,000
25 (ALD—18)
35,000
45,000
$1,000
38,000
29 (ALD~189)
Shot 4
Altitude
Feet
63,000
.
36,000
24,000
45,000
38,000
28 (ALD-31)
36,000
$0,000
48,000
* 84,000
30 (ALD—33)
35,000
60,000
46,000
55,000
4§ {ALD-33)
95,000
§0,000
3,600
(stem dissipating)
140,000 (main cloud)
28 (ALD—36)
45,000
110,000
34 (ALD—36)
46,000
92,000
21 (ALD~ 43)
35,000
63,000
gives the diameters of the eight condensation rings measured. Rings No. 1 and No. 2 ~
were clese together near the base of the cloud. No. 3 the next highest, No. 4 and No. 5
in the next higher group, and No. 6, No. 7 and No. 8 forming the top group. Good meas~
urements were not obtainable on rings No. 7 and No. 8, because of their relatively short
lives. All the rings remained at approximately the same height througout the period
measured. The lowest ring was measurable from 0.3 to 0.7 minutes, during which timeit
remained at an altitude of 35,000 fect. Rings No. 2, No. 3 and No. 4 were visible between
0.5 and 0.9 minutes, at altitudes of 39,000, 49,000 and 55,000 feet, respectively. Rings
No. 5 andNo. 6 were measured at 57,000 and 60,000 feet from 0.6 minute to 0.8 minute.
—
No data were obtainable on Rings No. 7 and No. 8.
The height to the top of the thunderhead was measured on three films. The. resulting
data are in poor agreement but indicate that the thunderhead reached a maximum height of
135 + 10 thousand feet at approximately 9 minutes. Measurements on four filrns of height to
the base of the lowost skirt were equilly unsatisfactory. It is estimated that the base of the
skirt remained at a constant altitude of 31 + 10 thousand feet between the initial appearance
‘
30
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