It's about 25 years since I did post curing of the wings and tail planes. Mine
is a Classic with wings which needed about 1000 man hours of careful effort. I
built a crude insulated "box" and placed two electric fan heaters to blow hot
air in through small ducts low down at either end, being very careful not to
allow direct blasts onto the flying surfaces.
In the early instruction manual was a warning from Ivan Shaw not to allow
anything
being cured to exceed 50C, lest the blue foam inside should swell and your
carefully created masterpiece would transform itself into the proportions of
a Snickers chocolate bar. Also, if the wing was supported on trestles and left
unattended in excessive heat, the resin would soften above 50C and the wing
would
sag between the trestles.
So it is highly recommended either to have thermostatic control of curing
temperature,
or to place a few thermometers against the pieces being post cured and
to monitor the curing process at 15 minute intervals throughout the long hours.
This I did by briefly opening the box each time and quickly reading the
thermometers.
I then adjusted the fan heaters as required, which meant that I was
being the thermostat.
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