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Project 11,2 = Sampling ~ H, F, Plank
(P, F, Moore)
EQUIPMENT
Four F~8 and two B-57 type aircraft equipped for cloud sampling
as described in RRRPerort were used on this mission, | The
F-8), aircraft were designated by the code name Tiger, the BeS57 aircraft
that were used for sampling was given the code name of Hotshot and the
other B-57, which was used as the control aircraft, was Cassidy.
WEATHER
Predicted and observed wind shears were very high, on the order of
200 to 300 degrees and 8 to 10 knots in velocity difference per 5,000
.
feet change in altitude,
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Cloud cover consisted of about 3/8 scattered
alto~stratus from 18,000 to 20,000 feet, but this did not intrude on
the bomb cloud or interfere with visual penetration of the sampling
targets.
CICUD DESCRIPTION
The cloud rose in a straight colwm reaching a top altitude of
32,000 feet in less than 10 mimites,
The cloud began to break up
rapidly under the influence of the strong directional wind shears
although velocities were low enough so that the cloud did not break
into separate pieces for a considerable time, but instead stretched
out into a long, very thin spiral shape, until about 135 hours after
burst time, when the arms of the spiral started to break apart and
spread out into small thin strata,
The cloud was of a very pronounced
red color at all times, which was of great aid in locating the long,
thin strings of the cloud in which sampling penetrations were made,
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