> Of particular note the AEROPOXY ratios are 27:100 by weight or 1:3
>by volume. I spent the extra and bought both a scale and a pump. The pump
>will save you a lot of time in the long run and provide an accurate mix every
>time. I am not sorry I bought the pump.
Before you all rush out to buy a pump, remember that while it will deliver
a constant ratio by volume, a change in working temperature will result in
a different ratio by weight. It's the weight ratio that's important (so as
to get the correct numbers of molecules interacting with each other), not
the volume.
For best accuracy (& remember, accurate measuring contributes to maximum
airframe strength at minimum weight!) your pump should be calibrated and
used at the same temperature. For this reason, many people like to store &
use the pump (and the next batch of raw resin & hardener) in a
temperature-controlled box.
cheers
Rowland
... that's Rowland with a 'w' ...
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