January 11, 2006:
Dropping Pearman D-27
I was not pleased with my photographic capture of Monday's D24 implosion.
Since repetition is the first law of learning - I tried again with D-27.
Today's results were much better. Here is today's story.
Earlier this morning, I visited Bob McCabe work on the Mt Pleasant side
and took a few photos of the foundation work for the Mt Pleasant
observation pier. Surprise - in these photos was the little Testa tug
that could - preparing to move a barge.
and walking up the Grace I took another photo of the Testa boat and barge.
And look who was standing in the middle: Ken (left), Bret (middle) and
Phillip (right) - on their way to load D-27. I am always surprised when
I take a photo like this only to discover at the fact what it really
represented.
For me the day stated a bit later. Sharon picked me up at the Sea Breeze
about 1:30 - time to get setup for the 3pm event. Here is the before
on our way out to the worksite.
D-27 is to the right of the middle Ravenel pier and
just to the right of the Grace cantilever anchor
Our worksite - with Ken and Bret loading the last of the column
A closer view - with Ken using the rod to tamp the material into place
Here is Bret loading
Here is the fuse array
Here is the before
followed by fuse ignition sequence - extracted from the video frames
at 33 msec intervals
T = 0 sec |
T = 0.033 sec |
T = 0.067 sec |
T = 0.100 sec |
T = 0.133 sec |
T = 0.167 sec |
T = 0.200 sec |
T = 0.233 sec |
T = 0.267 sec |
T = 0.300 sec |
T = 0.333 sec Base detonates |
T = 0.367 sec |
T = 0.400 sec |
T = 0.433 sec |
T = 0.467 sec |
T = 0.500 sec |
T = 0.533 sec |
T = 0.567 sec |
T = 0.600 sec |
T = 0.633 sec |
From the high resolution images - ignition is evident near the base
of the right column
Detonation at the base
and the cap
lots of smoke and fury
and down the pieces fall
with the wind blowing the smoke to the north
Most of the smoke has cleared and sure enough - no more D-27
Just a small pile of fragments on the base with D-28 and C-1 in the
background
Here is the after
and our smiling team: Bret, Ken and Phillip (Mickey is still
recovering from his appendix episode
another view of the after
Looking over Sharon's shoulder
and another after - only D-23 and D-28 remain