----- Original Message -----
From: "Haywire" <haywire@telus.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, March 14, 2003 8:39 PM
Subject: [FlyRotary] Coolant header tank & Coolant filler neck thingy???


> Hi Guys;
> I've been away at tech school for a few months and am just beginning to
get
> back to work on my engine. I did fly home every weekend, but just worked
on
> painting the plane so this is the first I've worked on the engine since
> doing coolant flow tests back in December.
> In an effort to design the most efficient coolant system possible, I've
> built my own header tank. I've drawn a diagram of the system similar to
the
> diagram provided by Lyn. To finish this tank I need to put a cap on it. I
> searched the internet for aluminum filler necks and found some in England,
> but while looking through my repair manual I found a pic of a bolt-on
> plastic flange mount filler neck. This is shown in the pic "rad cap filler
> neck". Can somebody out there tell me if this is just a mount for a filler
> cap or if it is for a pressure cap? Can I also get the dimensions of it
with
> & without the cap.
> The "coolantheadertank" pics show how it will be mounted & the "coolant
> recovery bottle" pic is an old snowmobile coolant tank modified. Side port
> on this tank has been plugged and bottom port has been modified to accept
a
> 3/8 hose.
> Comments, criticism are welcome, but I'd really like the info on the
filler
> neck thingy, so I can order one tomorrow if it is appropriate.
> Thanks
>
> S. Todd Bartrim
> Turbo 13B rotary powered
> RV-9endurance (FWF)
> Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/03
>

Hi Todd,
Two comments, you must replace the alluminium pipe coupling the two
radiators together with rubber and a 'Y' junction. Vibration will crack the
alluminium. The evaporater cores look to be too solidly mounted also. The
rotary is smooth but the rig will still vibrate.
Re the tank set up, I have found the best system is a pressurised overflow
tank, I haven't topped mine up since fitting it. Instal a car tubeless valve
for pressure testing.

Ian RV6A Australia.


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