This temperature difference would make a 4 or 5 percent difference in energy
(about 0.3% per Fahrenheit degree). The energy relations for rubber must be
calculated on an absolute temperature scale. There is not a 15% energy
difference between the temperatures you mentioned.
Backing off on winds to reduce initial torque will also change the shape of
the used torque curve, giving a more favorable distribution, but it also
alters the location of the level flight torque point, requiring new motor test
flights.
Updrafts may have been involved. Updrafts are hard to standardize. In
our gym, we put our model boxes on the stage on one side. With 10 or 15 of us
all standing on one side of the gym, each putting out 150 watts of heat, we
create a noticeable thermal. Planes drift toward the far wall and we see the
lighter ones bob up when they fly over the crowd. Lights below the ceiling
can also affect flight paths.
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Received on Mon Feb 26 2007 - 02:47:23 CET