). 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. =20 >=20 > I have to admit that I'm still mighty tempted to add a couple small = bleed ports while it's still easy to do. =20 >=20 > Cheers, > Rusty (any excuse to weld something) >=20 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. ------=_NextPart_000_002F_01C4011F.14A750E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

----- Original Message -----

From: <13brv3@bellsouth.net>

To: "Rotary motors in aircraft" = <flyrotary@lancaironline.net>

Sent: Wednesday, March 03, 2004 10:48=20 AM

Subject: [FlyRotary] Re: Ideal Cooling = System=20 Plumbing (was Re: [FlyRotary] Re: overflow = connections

> > Now I think I have a = reasonable=20 explanation: He had air trapped somewhere
> > in the top = of his=20 rad/cores or hoses in that vicinity, which impaired his
> > = cooling;=20 then by reversing "in and out", he started moving the air or air
> = >=20 bubbles out with the flow. Makes sense to me and solidifies my=20 position
> > that my hot coolant from the engine will enter the = BOTTOM=20 of both of my
> > cores via a Y or splitter in between = them, and=20 exit at the TOP of each, into
> > another Y.
>
> I = have my=20 inlets and outlets for both cores on the bottom, so the top would seem = to have=20 great potential for trapped air. I was thinking of addind a bleed = port on=20 the top of the cores, but Ed talked me out of it (and will be in trouble = if this=20 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=20 pressure gauge with the new setup (thanks to the EM-2), I should be able = to tell=20 if there is air in the system by how fast the pressure comes up with = temp. =20
>
> I have to admit that I'm still mighty tempted to add a = couple=20 small bleed ports while it's still easy to do.
>
>=20 Cheers,
> Rusty (any excuse to weld something)
> =

Oh, yea of little = faith. =20 You will need to burp the engine a couple/three times to get all the air = out of=20 the cores. But, by all means if your welding skills with very thin = wall=20 and brazed (lower melting temp than aluminum) aluminum cores are up to = the task=20 then bleeds will eliminate the need to do the burping runs. Good = luck=20 {:>).

Ed.

------=_NextPart_000_002F_01C4011F.14A750E0--