I screwed up....I installed -6 lines. (3/8 ")  I can easily remove the pipe
to AN adapter, however and have it welded closed and drill a smaller hole in
it. Thanks for the information.  Paul Conner

----- Original Message -----
From: "David Carter" <dcarter@datarecall.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, March 02, 2004 2:16 PM
Subject: [FlyRotary] Re: overflow connections


> To continue to beat up on this "air vent line from top of engine" - its
been
> made clear that the line should not be large.  I'd treat it like I would a
> "direct oil pressure gage":  If the oil line to gage breaks, you don't
want
> to dump all your engine oil out a big broken line, so folks use very small
> lines and even put in restrictors.
>
> Well, in this air/steam vent line, the issue is not breaking and dumping -
> rather, it is "bypassing the radiator".  So, to minimize coolant that
> doesn't get cooled, then either use the smallest possible line, or, as in
> the oil pressure tubing, put in a restrictor.  Air doesn't need much of a
> hole to flow up to your vent tank.
>
> For my education, Kelly, how big is a -3 hose?  3/16 ID?
>
> David
>
> ----- Original Message -----
> From: <keltro@att.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Tuesday, March 02, 2004 12:14 PM
> Subject: [FlyRotary] Re: overflow connections
>
> > > The input I got about the expansion tank was to plumb the lower
> connection
> > > down to the radiator and the upper connection to the top of the block.
> > > That's what I did, and apart from the problems I had with the
> thermostat, it
> > > seems to work fine. I have a 23 lb cap on the expansion tank and a
small
> > > overflow bottle.
> > >
> > > Regards,
> > > john
> > >
> >       Paul and John,
> >
> >          Let me expand on this subject. The input I have said to plumb
the
> bottom
> >  fitting of the expansion tank to input (suction side) of the water
> pump/radiator
> >  to keep system pressure seen by the pressure cap to a minimum. The
upper
> expansion
> >  tank fitting should be small (-3 an hose or not over 3/16" I.D.) and
> connected
> >  as John said to the top of the engine block. Its function is to bleed
any
> trapped
> >  air in the system to the tank. IMHO
> >
> >       Kelly Troyer
> >
>
>
>
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