Mailing List flyrotary@lancaironline.net Message #28368
From: Al Gietzen <ALVentures@cox.net>
Subject: RE: [FlyRotary] Re: Radiator Expansion Tank
Date: Sat, 10 Dec 2005 08:14:58 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

 

Or you can do what I did.  Go to your local fire extinguisher service/refill place, and check for one of their reject bottles that is about 1 1/2 quarts.  These are lightweight aluminum bottles, usually painted red.  On mine I was able to just peel the paint off, no paint remover required.  I bought a cap neck from one of the on-line specialty shops, and took it to my favorite aluminum welder for welding on to the bottle.  Result is a nice lightweight tank that was the right configuration for me (see photo).  Also installed a low-level switch.

 

Al


--Good craftsmanship on the tank and all in the pic looks good, what are the sensers I see in the pic?

Wendell

Wendell;

 

At the top of the pump outlet pipe is bleed plug – O-ring plug drilled up the middle, then to the side just below the O-ring. Loosening it a turn or so allows air to bleed out.  I have a replacement plug for that fitting with a standard air valve so I can prssureize the system for testing, as necessary.

 

Directly below that on the pump outlet is the coolant pressure sender.  Near the bottom of the overflow bottle is a coolant level sensor (right angle nylon float switch.  That bottle normally has about 3-4” of coolant in it; the rest air.  If the coolant get down to 1 – 1 ½” I get a warning light on the panel.

 

Al

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