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----- Original Message -----
Sent: Wednesday, March 03, 2004 10:48
AM
Subject: [FlyRotary] Re: Ideal Cooling System
Plumbing (was Re: [FlyRotary] Re: overflow connections
> > Now I think I have a reasonable
explanation: He had air trapped somewhere
> > in the top of his
rad/cores or hoses in that vicinity, which impaired his
> > cooling;
then by reversing "in and out", he started moving the air or air
> >
bubbles out with the flow. Makes sense to me and solidifies my
position
> > that my hot coolant from the engine will enter the BOTTOM
of both of my
> > cores via a Y or splitter in between them, and
exit at the TOP of each, into
> > another Y.
>
> I have my
inlets and outlets for both cores on the bottom, so the top would seem to have
great potential for trapped air. I was thinking of addind a bleed port on
the top of the cores, but Ed talked me out of it (and will be in trouble if this
doesn't work <g>). His is set up the same way, and he has no
problems with air being permanently trapped. Since I'll have a coolant
pressure gauge with the new setup (thanks to the EM-2), I should be able to tell
if there is air in the system by how fast the pressure comes up with temp.
>
> I have to admit that I'm still mighty tempted to add a couple
small bleed ports while it's still easy to do.
>
>
Cheers,
> Rusty (any excuse to weld something)
>
Oh, yea of little faith.
You will need to burp the engine a couple/three times to get all the air out of
the cores. But, by all means if your welding skills with very thin wall
and brazed (lower melting temp than aluminum) aluminum cores are up to the task
then bleeds will eliminate the need to do the burping runs. Good luck
{:>).
Ed.
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