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Bryan,
To clarify Randy's baffling changes, there needs to be a certain minimum of
opening at the bottom of each the head/cylinder. The baffling as it wraps
around each cylinder/head needs to be tight; kept tight, but not wrap around the
bottom too far. This subject is a part in a book written on speed and
cooling mods for RV's from several years ago (90's). I do not have
the book, but read it. According to the tests done in the book,
opening up the space increases cooling efficiency to a point,
but opening them more than a certain amount does not increase the
cooling further. I made the changes, but in my case it was of no
benefit.
Also, #3 cylinder has no fins at the back, so the baffling is tight against
the cylinder. Modifying the baffling in that area to allow air movement
thru may help that cylinder if it runs hotter than the rest. I have
seen the benefit of that mod on a 6 cylinder (not #3 of course).
Gary Edwards
LNC2
----- Original Message -----
Sent: Sunday, February 06, 2011 3:04
PM
Subject: [LML] Re: 360 Cooling
Bryan,
I am talking about the baffling that wraps
around the cylinders. IF they are too tight at the bottom you will
run hot...
I opened up mine a little and also rounded the exits so
they are not square.
It helped..
Hope that helps some..
Randy
Snarr
N694RS
"Flight by
machines heavier than air is unpractical and insignificant, if not
utterly impossible"
-Simon Newcomb, 1902
--- On Thu,
2/3/11, Bryan Wullner <vonjet@gmail.com> wrote:
From:
Bryan Wullner <vonjet@gmail.com>
Subject: [LML] Re: 360
Cooling
To: lml@lancaironline.net
Date: Thursday, February 3,
2011, 10:39 AM
I think I'm going to try the small lips on the
bottom of the cowling at the exit. See if that does anything.
Im not fully understanding what your saying about the bottom
baffeling. Are you talking about the center peice that goes between
each cyl on the bottom?
Bryan
On Tue, Feb 1, 2011 at 4:48 AM,
randy snarr <randylsnarr@yahoo.com>
wrote:
Bryan,
Check the exits on the baffeling on the
bottom of each cylinder. If memory serves, there was a paper
released by NASA with some cooling info on these small
engines. I thought it was 1.6" times the depth of the cooling
fins for the opening at the bottom of the cylinder. I remember
going a little wider, say 2" or so.. If they are a little too
tight at the bottom, that can cause cooling issues. I opened
up mine a little and also rounded them off instead of 90 deg
bends. Also for the air inlets on the engine, you are better
off to have that be smooth with no
steps.
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