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Mike,
Series with Mocal between. Rad's made by Ed at
Techwelding. Cores are 2.75" thick and have a very dense fin
count. No flight testing yet but I have 22 hours of ground runs. Half
or more at high \ medium rpm. bjh
Bobby,
Just to clarify, you have the radiators plumbed in
series with the Mocal between them? Are these actual auto style radiators, or
the more typical A/C evap cores? Do you have any pictures I could take a look at
?
Thanks,
Mike
----- Original Message -----
Sent: Tuesday, April 28, 2009 4:09
PM
Subject: [Norton AntiSpam] [FlyRotary]
Re: Mocal Oil Cooler ECD54-182
Mike,
I have the largest (ECD54-329) plumbed between two 400 ci
water radiators. I can tell you it is very effective. With my cowling off,
extended full power ground runs I see oil temp trailing water temps by 40-50
degrees. Water at 180-200.
With lower cowl only, same conditions, the oil tracks the
water a little closer. 20-40 degrees. With full cowl the temps come up
together and stay together after about 170 degrees. I really think the
ECD54-182 would have worked. It would have also been much easer to plumb
making the hoses between my dual radiators much shorter and
lighter.
Bobby
Thanks, I understand the heat has to go
somewhere. I havent done enough flight testing to say for sure, but
what I have done so far seems to indicate that I have excess cooling
capacity on the radiator side. Time will tell. If there is excess capacity, a
water-oil exchanger will definitely simplify my installation
considerably.
Mike Wills
RV-4 N144MW
----- Original Message -----
Sent: Tuesday, April 28, 2009 11:56
AM
Subject: [Norton AntiSpam] [FlyRotary]
Re: Mocal Oil Cooler ECD54-182
Mike,
You must upsize your radiator if you want to use the
oil-to-water exchanger as your sole oil cooler. It should work but you still
need enough heat exchanger to handle you BTU needs. So you would need a
20-30% bigger radiator for things to work.
Bill
Jepson
-----Original Message-----
From: Mike Wills <rv-4mike@cox.net>
To: Rotary motors
in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 28 Apr 2009
9:21 am
Subject: [FlyRotary] Re: Mocal Oil Cooler ECD54-182
Todd,
Are you using this as your sole means of
oil cooling, or as a supplement? I've always been intrigued by the idea of
an oil-water exchanger, but have yet to hear of anyone successfully using
one as a sole means of cooling a rotary in an aircraft application.
Something like this would sure simplify my plumbing and eliminate some
weight. I'm tempted.
Mike Wills
RV-4 N144MW
----- Original Message -----
Sent: Monday, April 27, 2009 11:57
PM
Subject: [FlyRotary] Mocal Oil Cooler
ECD54-182
Hi Guys
Quite some while back Mark
Sietle put a Mocal oil cooler in his plane, which I was quite impressed
with. Recently I began watching ebay for one of these coolers and a few
weeks ago I hit paydirt. IRC, Mark was using the C43-330 which is a fine
looking piece of craftsmanship but are pricey little devils at $350
apiece. They are 330 mm long and a single pass. The E54 series offer 25%
greater cooling in a comparable size, while the ECD54 series are dual core
and have double the cooling capacity as the comparable size C43 cooler,
but are prohibitively expensive at ~$800.
I managed
to get mine for $275usd and it was still new, never used. The seller had 2
of them and since I only took one there is still another available. He
indicated that he would re-list the other cooler on ebay, but I haven't
seen it yet or I'd have just posted the listing. So if anyone is
interested you can just contact him direct at chines@pendragon-design.com
.
I'm very impressed with mine as it is a very fine
piece of workmanship. It is only 182mm long but weighs in at just under
3lbs. Attached are a few pics of it disassembled.
Thought I'd pass it
along.
Todd
C-FSTB
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