Ron, A tunnel made of 2inch polystyrene sheet (available from the local DIY
store) serves quite well and cheaply. A hairdryer at one end , an exit hole
at the bottom at the other end and a thermometer stuck through the side at
sample heights makes it all controllable. I took my temps from the booklet
that came with every can of Ampreg resin, which gives strengths achieved for
different regimes, but from memory it was about optimum with something like
18 hrs at 55 deg centigrade. It is worth making your system long enough to
take the flaps & ailerons while you are at it. I would be very dubious about
letting any 220 deg Fahrenheit air anywhere near it as that temp is quite
enough to soften and distort the structure , and your diluting or mixing
system might fail to give uniform cooling to 55 deg (131 in old units!) and
leave you with a droopy tail! Cheers David Joyce
----- Original Message -----
From: Ronald J. Parigoris <rparigor@suffolk.lib.ny.us>
Subject: Europa-List: How did you Post Cure?
<rparigor@suffolk.lib.ny.us>
>
> Need to Post Cure tailplanes.
>
> How have you post Cured (What means of heat)?
>
> At what temperature and for how long?
>
>
============================================================================
==========
>
>
> Have heard that 1 hour at 160 to 180 degrees F???????? Manual talkes of
alot less for
> alot longer.
>
> What is temperature you should not exceed in Post Cure to prevent Foam
damage, or ?
>
>
============================================================================
========
>
> I have a constant source of 220 degree F clean air. If I were to blow just
a portion
> into the oven, with a vent on the other side, you think i can configure so
I get lets
> say 150F without any hot spots?
>
> Any ideas on this?
>
> I would rather not go through the complexity if i can avoid of taking
ambient air and
> run it through a squirrel cage blower, and mix it with this 220 air.
>
>
> Thanks
> Ron Parigoris
>
>
|