The Murphy Builders Site

Al, I've always had my oil cooler on the rear baffle of my 0320, and my
oil
temps have never been a problem, even in the heat of the summer. It's just
been my CHTs, which now are OK as well after opening my inlets. Except in
the middle of the summer, I have most of cooler blocked off. So I
obviously
have way more cooling there than I need. Not sure what make it is, got it
at
a local boneyard when building.

If a rear baffle mounting gives better oil cooling, you might want to try
relocate yours there first, before adding a second one.

Walter

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Al
Paxhia
Sent: May 4, 2006 7:47 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] SR Oil Cooler for IO-540

My summer oil temps on floats are still higher than I want, so I am going
to

add a second oil cooler. The plan is to mount it on the back of the rear
baffle. Has anyone mounted a cooler there and if so what make, model and
size cooler did you use? Do your cylinder temperatures run hotter on the
side with the cooler? Also a good source for purchase.
Thanks,
Al





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I had heard that there are a number of Rebels in Nfld, so assume
you would have been in touch with them to get your rigging right.
Just wondered how the float angles, and step position compared to
the MAM amphibs.

I understand also that FLs will accumulate water in the bladders,
so hopefully that isn't happening yet with your new ones, and
affecting your weighing.

Walter

----- Original Message -----
From: Alvin and Glenys Adams <gander.electrical@nf.sympatico.ca>
Date: Friday, April 28, 2006 3:35 pm
Subject: [rebel-builders] Weight & balance:

Goday Floks:

To anwer you questions Walter.I am in Gander Nfld Lab.
In order to get Cof G we balanced the aircraft on a piece off 2

"

conduit,balanced perfect.We than put a scale under each float at

C

of G.Was told this ia acceptable method,is this a normal
parctice.Have not been on wheels so do not know weight.
The rigging i used for the full lotus was,Rebel wing struts for
spreader bars & murphy struts.Did not weigh floats seperately

but

they are much heavier than the 1800s had on my cub.


Regards Alvin R776



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From: WALTER KLATT <Walter.Klatt@shaw.ca>
Sent: May 5, 2006 9:50 AM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] SR Oil Cooler for IO-540


I am not sure by what you mean by wider. In my case, I mounted the long side of my cooler vertically on the baffle, so there was plenty of width room. The bottom part of it was well down to the bottom part of the cylinder, but still more room there, too. I did mine on the right side of the engine, which is the cooler intake side of the cylinder. The tightest part for me was the oil stick but managed to work around that, too.

Also, if you are just using a 3 inch scat, that could be your problem, too. I've heard of a few cases where going to a 4 inch scat really helped. I think someone on this list did that, too.

Walter

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Al Paxhia
Sent: May 4, 2006 9:44 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] SR Oil Cooler for IO-540

Hi Walter,
That was my original plan when I was building but the cooler is an inch or
so wider than the baffle and did not fit the space. I draw the air for the
existing cooler from a 3" scat tube from the back baffle but still need more
cooling. On wheels the existing setup works ok but not on floats oil temps
are always high on summer days. The CHT's run 365 to 385, and 405 in a 5
minute climb.
Al



----- Original Message -----
From: WALTER KLATT <Walter.Klatt@shaw.ca>
Date: Friday, April 28, 2006 3:58 pm
Subject: Re: [rebel-builders] Weight & balance:

I had heard that there are a number of Rebels in Nfld, so assume
you would have been in touch with them to get your rigging right.
Just wondered how the float angles, and step position compared to
the MAM amphibs.

I understand also that FLs will accumulate water in the bladders,
so hopefully that isn't happening yet with your new ones, and
affecting your weighing.

Walter

----- Original Message -----
From: Alvin and Glenys Adams <gander.electrical@nf.sympatico.ca>
Date: Friday, April 28, 2006 3:35 pm
Subject: [rebel-builders] Weight & balance:

Goday Floks:

To anwer you questions Walter.I am in Gander Nfld Lab.
In order to get Cof G we balanced the aircraft on a piece off 2

"

conduit,balanced perfect.We than put a scale under each float at

C

of G.Was told this ia acceptable method,is this a normal
parctice.Have not been on wheels so do not know weight.
The rigging i used for the full lotus was,Rebel wing struts for
spreader bars & murphy struts.Did not weigh floats seperately

but

they are much heavier than the 1800s had on my cub.


Regards Alvin R776



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Al,
Can you find 4" scat tube and flanges and uprate the flow to the cooler?
If the cooler is large enough my guess is that you are not putting enough
air through it. The 4" tube will flow about 78% more air.
Ralph Baker



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Al,
Can you find 4" scat tube and flanges and uprate the flow to the cooler?
If the cooler is large enough my guess is that you are not putting enough
air through it. The 4" tube will flow about 78% more air.
Ralph Baker



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al

if you look in mcmaster carr catalogue on line (out of Cleveland) they
carry
stainless piping for food industry that has flanges, forget page but as i
recall, i think i was going to use for my scat tubing, also for fire wall
pass throughs, will dig up and send more details tonight

mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of Al
Paxhia
Sent: Friday, May 05, 2006 6:57 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] SR oil cooler for IO-540


Thanks, good idea to increase to 4". I can find scat tube but still
looking
for flanges, as a last resort I can always make flanges with tabs.
Al
----- Original Message -----
From: "Ralph Baker" <rebaker@sc.rr.com>
To: <rebel-builders@dcsol.com>
Sent: Friday, May 05, 2006 6:53 AM
Subject: [rebel-builders] SR oil cooler for IO-540

Al,
Can you find 4" scat tube and flanges and uprate the flow to the cooler?
If the cooler is large enough my guess is that you are not putting enough
air through it. The 4" tube will flow about 78% more air.
Ralph Baker



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I found 4" flanges at the local lumber yard. They are aluminum round vents
with screen, I cut the screen out and drilled mounting holes in the rim of
the flange. They also have aluminum flex tubing it looks like it could
substitute for scat tube. The aluminum tube is heavy walled dryer vent. They
also have aluminum dryer vent tubing that is a foil with spiral wire on the
inside. I'm thinking the heavy stuff, does anyone see a reason not to try
this stuff?
Al