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Date: Fri, 16 Jun 2006 14:56:10 -0500
From: Dennis Haverlah <clouduster@austin.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Water hose sizing and disposition - the little ones.
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I'm using the 5/8 " nipple for my cabin water heater, the small hole on 
the top of the iron was tapped for 1/8 in.  pipe.  There I attached a 
AN-4 line back to the upper part of my water reservoir on the firewall.  
I did put a 1/16 in. restriction in the line to keep the flow rate low.  
This line is part of my continuous air purge system.

Dennis H.
RV-7A, Renesis

Perry Mick wrote:

> I don't recall ever seeing this explicitly addressed on the list 
> before, but have seen some pics...
>
> What are the sizes for the heater hose/water hose outlets on the rear 
> iron. One big one next to the Oil Pressure sensor.. and a little one 
> on the top, opposite of the big one.
>
> What are people doing with these to plug them off? or where are they 
> routing hoses from them to?
>
> Dave
>
>
>
> The larger one near the oil pressure sensor is designed for standard 
> automotive 5/8" heater hose.
> The smaller one on top of the engine makes a great air vent, connect 
> it to a shrader valve. I got a shrader valve with a 1/8" npt on the 
> other end at napa auto parts, it's called a "tank valve". This valve 
> is located near the coolant pressure cap, so I can release air from 
> the top of the engine while topping off the coolant. In the car it 
> uses 3/8" hose and makes a little coolant loop that ends at the back 
> of the water pump, and is used to increase the idle speed when the 
> engine is still warming up.
>
> Perry
>
>
> -- 
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