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Project 1.5 - Drag Characteristics of Various Shapes - J.J. Meszaros
OBJECTIVES
MEVETE
The primary objectives of Project 1,5 on Shot]
CHEROKEE)
were the investigation of aerodynamic drag characteristics of actual and
idealized shapes when exposed to transient loading conditions resulting
from a high yield nuclear detonation,
The actual shapes consisted of wide flange I beams and angle beams,
The idealized shapes consisted of 3 inch and 10 inch diameter spheres.
INSTRUMENTATION
wet
Project 1.5 had four stations on Sho
: (CHEROKEE).
They 4
Were located on Bokobyaadaa (Able), man made islands one and two, and .
on Yurocht (Dog).
At Bokobyaadaa (Able) and Yurochi (Dog), there were
I beam, angle iron and sphere stations.
The other two locations had
only beam stations,
The sphere stations consisted of two 3 inch gages and one 10 inch
gage.
These gages measure the drag forces in three directions:
lateral, and vertical, both positive and negative phases.
ponent was measured by a four arm strain gage bridge.
axial,
Each come
Each bridge is
pre-stressed and any imbalance is recorded.
The I beam was instrumented as a "simply supported" beam.
was used to support each end of the beam,
mented with strain gages.
These sensors were instru-
The strain gage bridge was so wired that any
bending moment would be cancelled,
A ball and socket joint was put on
each end of the sensor to nullify torsion.
recorded was compression.
A sensor
As a result the only strain
The records were resolved into a drag force
versus time curve.
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