REFLECTOR:Cooling a canard

[Chuck Jensen]

Well, Larry, the definite answer to that is "maybe."  I assume the 212F is
referenced because we want any accumulated condensation to boil off.  

Fair enough but I suspect its not that simple.  First, as we go up in
altitude, the boiling point for water drops (I'm too lazy to look it up but
it probably drops to around 190F at a few thousand feet.  So, during climb
out, when the oil is the hottest (and condensation from setting on the ramp
the greatest) you are heating the oil to its highest temp while lowering the
boiling point of water with altitude.  All good stuff.

Of course, if the condensate has dissolved minerals and other "junk" in it,
that will raise the boiling point as well the positive pressure in the
crankcase.

What does all that mean?  I don't, know but probably not much.  At least,
I've not heard of anyone draining water out of the crankcase every time they
change oil (have they?).  If that is the case, it seems that 190+F with an
occasional excursion above 200F seems to be adequate to flash off the
moisture in the oil.

Must go.  My head is hurting from all that thinking.

Chuck Jensen
Diversified Technologies
2680 Westcott Blvd
Knoxville, TN  37931
Phn:     865-539-9000 x25
Cell:     865-406-9001
Fax:     865-539-9001
cjensen@dts9000.com


-----Original Message-----
From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On
Behalf Of lawrence epstein
Sent: Monday, September 15, 2003 5:32 AM
To: reflector@tvbf.org
Subject: Re: REFLECTOR:Cooling a canard


Don't you want your oil temps to be over 212 f?

Larry Epstein
173 FGE


>From: Scott <scott@tnstaafl.net>
>Reply-To: reflector@tvbf.org
>To: <canards@tnstaafl.net>, <reflector@tvbf.org>
>Subject: REFLECTOR:Cooling a canard
>Date: Sun, 14 Sep 2003 17:36:52 -0600
>
>Plugged up two more small holes in the baffling this morning and flew to 
>Santa Fe and back.
>
>Leaving Grants it was about 70 degrees. Climbed to 9500, from 6500, Cyl 
>temp's were 320 when I leveled off, oil temp was 190.  Leaned to about 60 
>LOP, turning 2710(avg), burning 9.6gph.  indicated was 160 to 165 knots. 
>ground speed was 185 to 190, I had a tail wind.
>
>The cyl temp's stabilized at 335(the hottest), oil at 198.
>
>Landed 35 minutes later and had a coke. Got back in engine was already hot,

>long taxi and about a 2 minute wait at the hold short line.
>
>Leaving SAF it was about 75 degrees took off from 6300, leveled off at 
>10500, cyl temp's were 345, oil was 205.  Leveled off, leaned to 50 LOP, 
>turning 2740, indicating 160KIAS, 9.6gph.
>
>In cruise Cyl temp's fluctuated from 336 to 344(hottest), oil gage glued to

>201.
>
>Looks pretty good, except for my one cylinder that is running the hottest, 
>3 are running at 305-310, it runs at 340, its #2, rear right hand side.
>
>GAMI lean test this week, though I can run 100 LOP with no stumbling. With 
>the EI of course. Dual mags, no way.
>
>Scott
>
>
>
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