In the distant past I looked up expansion of rubber and was surprised to
find that it expanded a bunch and almost acted like a perfect gas ie: pv=Rt
Using this gave energy change with temp that was in line with measured
values.
Since Click & Clack on CAR TALK also claimed rubber ie fan belts loosened up
at low temp, I decided to run some simple tests to verify which was correct.
Tied some rubber between eyes on a fishing pole leaving a bit of slack.
Several trips to the cooler outdoor environment showed it did the
conventional shrink with cold.
A smaller sample using a steel rod was made up so it could be cycled between
freezer & oven which gave same result.
A KISS test with a knot in the center of 2 rubber legs was tried. The
extreme sensitivity potential was never obtained as the Golf Ball Thread
(basically thin Tan II) had way too fast a response time for this to work.
My results seem to be in the same direction as old handbook data and space
shuttle experience.
I encourage others to verify.
One test worth 1000 opinions,
H
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Received on Tue Feb 14 2006 - 19:32:34 CET