Sender: <marv@lancaironline.net> (Marvin Kaye)
To: flyrotary
Date: Fri, 14 Mar 2003 19:03:04 -0500
Message-ID: <redirect-2053080@logan.com>
From: peon@pacific.net.au
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Subject: Re: [FlyRotary] Coolant header tank & Coolant filler neck thingy???
Reply-to: leon@aerota.com
Priority: normal
In-reply-to: <list-2052512@logan.com>

Hi Todd,

 See comments below marked %%

On 14 Mar 2003, at 7:39, Haywire wrote:

> 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. 

%%
Wondered where you were!! 

SNIP

 Can somebody out there tell me if this
> is just a mount for a filler cap or if it is for a pressure cap? 

%%
Both.  It's the highest point in the system on the car,  and it is also 
a pressure cap as well. The plastic bit sits on a flat flange.  They 
take the same size caps as most of the late model cars with thin 
radiators.

Can I
> also get the dimensions of it with & without the cap.

%%
I'll see what I can rustle up at work tomorrow morning.  I think I 
have a complete '89 pump sitting on the shelf somewhere that I can 
measue,  unless someone comes up with the measurements 
sooner.

>  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.

%%
Only comment I can make is that I can see a stress fracture 
coming to an engine cowl near you REAL SOON where you have 
welded the pipes onto the evap cores.  You could end up with 
glycol all over your screen..  I'd hate to see you cook a motor. I just 
couldn't stand it then got blamed on the EWP by "you know who"!!

%5
The bracing looks a bit flimsy,  but it's hard to tell from the pix..  
Make sure that the evap cores are well supported  and gusseted,  
preferably on rubber.  Make sure the EWP is firmly mounted as 
well.  Don't let it just dangle.

%%
You will get ALL sorts of vibration harmonics from the evap cores 
as they cop a beating from the prop blast.  As it stands,  I can see 
one of those harmonics will be the natural frequency of that piece 
of drilled out angle bracket suppoting them.  I can see them in my 
mind's eye flapping like wings!

I%%
 would prefer to have short spiggots (just like a radiator) on each, 
and a T piece in the middle ,  all connected with flexible hose.  If 
you really wanted to be flash you could use Wiggins style 
couplings,  but WHATEVER you do,  the water lines MUST be 
flexible.

%%
Apart form that,  all looks good!

Cheers mate,

Leon

Best Wishes & Kindest Regards,

Leon Promet
Aerota.com
leon@aerota.com
0408 223 675