On Mon, 9 Sep 2002, John Carmack wrote:
> >Also for experimental biprop work, it might be worth making an extender
> >ring ... to experiment with different chamber lengths...
>
> Cooling is an issue there, but making the extension a big hunk of copper
> for heat-sink operation is probably reasonable.
It's also possible to make the extender with cooling passages continuous
with those of the rest of the chamber -- it has been done -- although that
takes some foresight.
Henry Spencer
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