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31.03
Ny måte å måle
"springbretteffekten på
Det har vært mye snakk om
ulovlige køller og
"springbretteffekten". Nå er
det kommet et forslag til en
enklere metode for å måle
køllene:
Den nye COR-måleren
Her er forslaget på
originalspråket:
New C.O.R. test proposed
Spring-like effect of
driving clubs of 15 degrees
or less would be updated
utilizing a new method and a
portable tester in 2004,
according to a joint
proposal by the U.S. Golf
Association and Royal and
Ancient Golf Club of St.
Andrews. As stated last
August, the two
organizations had committed
to finding a new and simpler
test method as quickly as
possible. The status of
driving clubs previously
ruled conforming wouldn't be
changed using the new test.
If adopted, the new test
method would become
effective Jan. 1, 2004.
Comments from manufacturers
are welcomed by the USGA
until April 25. Golf's two
rule-making bodies are
proposing to test for
spring-like effect in
driving clubs with a
patent-pending Pendulum
Tester that will be easier
to administer than the
current method that can only
be performed at the USGA's
Research and Test Center.
The new testing
method--designed by USGA
engineer Matt Pringle--would
not require a club to be
disassembled as the current
test does, and would take
only several minutes. "The
test has some advantages
over the method being used,
primarily that it is
non-intrusive," said David
Fay, the USGA's executive
director. "We don't have to
take a club apart to test
it. It's also portable,
faster and more accurate."
The new test will require
only a low-speed strike to
the clubface by a small
weight on a pendulum. The
device will measure the
contact time of the
collision — or
characteristic time, as the
term will be called--between
the two objects. The
spring-like effect will be
based on a club's
characteristic time. The
limit in characteristic time
very closely correlates to
the current spring-like
effect of .83 in the
coefficient of restitution
measurement.
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