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From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
References: <list-4920988@logan.com>
In-Reply-To: <list-4920988@logan.com>
Subject: RE: [FlyRotary] Re: On the subject of installations...Coolant Pressure
Date: Thu, 24 Mar 2011 18:18:34 -0400
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Bobby,
How did you know you had the leak? Were you getting air into the coolant?
Was coolant leaking into the rotor housing?
Bill B
_____
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bobby J. Hughes
Sent: Thursday, March 24, 2011 7:19 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: On the subject of installations...Coolant Pressure
Bill,
I had a coolant o-ring leak and replaced it over Christmas. If I remember
correctly I would see up 18 psi in flight. But my coolant temps never get
over about 190F. Inspection of the teflon
o-rings showed no detectable problems. But the leak is gone and WP is lower.
Bobby
_____
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bill Bradburry
Sent: Thursday, March 24, 2011 3:54 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: On the subject of installations...Coolant Pressure
Kelly,
I think I would be getting air into the system if that were the case. After
I have drained the system for whatever reason, it takes a couple of engine
runs to get all the air out, then it seems to stay out.
Bill B
_____
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Kelly Troyer
Sent: Thursday, March 24, 2011 5:36 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: On the subject of installations...Coolant Pressure
Bill,
Have you checked for compression leak into water jacket
??.............Hopefully that is not it !!...............
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo
_____
From: Bill Bradburry <bbradburry@bellsouth.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, March 24, 2011 4:30:31 PM
Subject: [FlyRotary] Re: On the subject of installations...Coolant Pressure
Lynn,
You have hit my quandary squarely on the head. Assuming that the pressure
was zero at room temp and rose to say 6-7 pounds at 200 degrees, and assume
that the flow restriction in the system caused a pressure rise of about 2
pounds at 2000 rpm and a pressure rise of, say, 6-7 pounds at 6000 rpm.
Under that scenario, you would have a pressure that ran at between 7-9
pounds at 2000 and rose to 12-14 pounds at 6000. Those pressures would be
easily contained with the stock cap of 14 pounds. And the pressure would be
constantly changing with rpm and possibly temp of the system as you were
under power or not.
I have a 21 pound cap. My system climbs smartly to the top and stays there.
No fluctuation with rpm, no real fluctuation at temp because it has already
hit the 21 pounds before the engine is actually hot. (around 190)
Something is wrong and I don't understand what it is.
Bobby
I am going to insert answers to your questions in your msg below.
Bill B
_____
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bobby J. Hughes
Sent: Thursday, March 24, 2011 1:57 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: On the subject of installations...Coolant Pressure
Bill,
This is all I can think of at the moment.
Are you running a thermostat or did you plug the hole between the inlets and
outlets of the water pump?
No thermostat. The Renesis has a thermostat tower which is too tall to fit
under my cowl, so I removed it and fabricated a flat plate with two 1.25
aluminum tubes for the inlet and outlet of the water pump. That hole you
are referencing exists in the tower, but not in my plate.
If plugged did you drill a small hole in the plug to allow air a place to
escape? I used a #30 drill.
Any air in my system would have to be carried to the highest point,
(radiator cap) then be forced by pressure to the bottom of the swirl tank
where it would be trapped. This seems to be working because I have found
that after I open the system for some reason, the level in the swirl tank
will go down and there is never any air at the top of the radiator.
After an engine run is the radiator the same temperature at the inlet /
outlet / bottom and top? If I have trapped air only part of my radiator gets
hot to the touch. Dual pass barrier leaking?
Seems to be. I have mistakenly laid my arm on the top of the radiator after
a run.usually I manage to get off pretty fast! :>) I can not see into the
radiator tank on the barrier side. It is possible it could be leaking. I
suppose if there was a rag in the thing it could be trapped here also. I
have no way to see in there even if the hose was removed. I would need some
kind of flexible camera or something like that.
Use an extra CHT channel and clamp it to the inlet of your radiator to
measure Delta T.
Good idea. I will have to rig one up. I don't have an extra now.
My water pressure does not vary that much in operation. But it does hold a
little pressure for a few days after shutdown. 1-2 psi.
What is your pressure during operation? What is the pressure cap rating?
Does it vary at all with temp and/or rpm? Mine is maxed out..always!
What size hoses? I'm running 1in.
The RX-8 uses 1.25 hoses. I stuck with that size as well.
Where are you measuring water pressure?
The hose that comes off the top of the rear iron goes to the top of the
radiator, just below the cap. A tee in this line has the water pressure
sender in it. The radiator cap is just a cap, not a pressure cap. The
outlet in the radiator neck goes to the bottom of the swirl tank.
Is your pressure cap on the bleed / swirl tank?
Yes.
Any pictures of the plumbing?
Not of the current setup.
Bobby
_____
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bill Bradburry
Sent: Thursday, March 24, 2011 10:23 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] On the subject of installations...Coolant Pressure
I need some help with figuring out my cooling problems.
Just so it doesn't get lost in the following BS, I need to state that I
think the problem is related to the coolant pressure. It seems to me to be
way too high. I am beginning to think that the coolant is somehow partially
blocked.
Now the rest of the story..
After I did the flight described in the attached email, I installed an
opening in the bottom of the cowl that would work something like a cowl flap
that is permanently open. The new opening is 9 inches by 5 inches or 54 sq
in.. There is a flare in front of the opening that is at an angle of 45
degrees and extends down into the airstream about 4 inches. (it is 6 inches
long.) This opening is in addition to two 6 X 6 openings, one of which has
a 3 inch diameter exhaust pipe in it.
This helped a little, but nothing like I expected it would. The pressure
inside the radiator inlet dropped from 10 inches of water to 8 inches of
water. (by the way, Steve was right about it being inches of water and not
inches of Hg.)
The pressure after the radiator and inside the cowl dropped to 8 inches as
well. The temperature of the water dropped to 208 and the oil a couple of
degrees. Neither of these had the result that I expected.
My water pressure cap is rated at 21 lbs. I have not calibrated the sender
that came with my EM-2 and it shows 3 lbs when the engine is cold. I assume
that this is zero. When in flight the pressure climbs to 24 lbs and stays
there. I assume that at this point, the cap is at 21 lbs and is bleeding
off air. There is about a pint to a quart of air above the coolant in the
bleed tank.
This morning I ran the engine on the ground for about 10-15 minutes at an
rpm of 3000 to 3200. The OAT was 75 degrees.
I read the temps and pressures every minute or two during the run. I hope
this doesn't get jumbled during transmission.
Oil temp - 80 103 130 139
144 155 162 165
Air temp after cooler - 97 109
122 129 133 134
Water temp - 86 126 161 173
178 190 198 199
Air temp after rad - 109 133
157 169 179 183
Water pressure - 2 11 17 20
21 24
I noticed that the water pressure could be brought from 2 lbs to 9 lbs by
changing the rpm while the engine was still relatively cool
What should I expect for water pressure at lower temps and how could I go
about making a determination that the water passages are clear?
I am beginning to think that a rag has been left either in the engine or the
radiator. I have never torn the engine down and I sent the radiator out to
have a leak repair a couple of years ago. It is a double pass radiator. I
can look into the end that has both sides connected thru the radiator cap
neck, but not into the inlet and outlet end.
Suggestions???
Thanks,
Bill B
_____
From: Bill Bradburry [mailto:bbradburry@bellsouth.net]
Sent: Sunday, March 20, 2011 5:29 PM
To: ' Rotary motors in aircraft '
Subject: On the subject of installations...
My water temp has been running between 199 and 217, depending on the OAT.
The oil is pretty steady at around 175. Today I finally got to fly with
pressure probes inside the cowling. I was all set to try and enlarge the
inlet to the radiator to solve the problem. It turns out that "in" is not
the problem, it is "out" that is the problem!
I have 10 inches of Hg pressure in the radiator inlet and 10 inches of Hg on
the outlet side as well as the same pressure everywhere I measured inside
the cowl. I need to open up the cowl some so more air can get out. I had
considered a cowl flap but that would not work in this instance because the
problem is at cruise. I need a permanent opening. I am considering louvers
and I am looking for a source. I know some of you are using them. Where
did you get them and how are they installed so that they look ok?
I am also considering some kind of flare around the exit area to create a
low pressure area to help suck air out. Do any of you have those and do
they seem to work?
While I look into this, I also need to do something about my muffler.Thank
you, Bobby!
I wonder about that spiral muffler some of you are trying??
Bill B 9 hours and counting.
By the way, I was considering putting a 1 or 2 inch wide piece of cardboard
across the bottom of the oil cooler to partially block it in the hopes that
more air would then flow through the radiator. Sort of like truckers do
with the radiator in cold weather. What opinions do you have about that
idea? I realize it would make more sense if the oil was really cool, but I
think the oil might not get much hotter if an inch or so was blocked. What
do you think???
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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bobby,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>How did you know you had the =
leak? Were
you getting air into the coolant? Was coolant leaking into the =
rotor
housing?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bill B<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>
<hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1>
</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
<st1:PersonName
w:st=3D"on">Rotary motors in aircraft</st1:PersonName> =
[mailto:flyrotary@lancaironline.net]
<b><span style=3D'font-weight:bold'>On Behalf Of </span></b>Bobby J. =
Hughes<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, March 24, =
2011
7:19 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> <st1:PersonName =
w:st=3D"on">Rotary
motors in aircraft</st1:PersonName><br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [FlyRotary] Re: =
On the
subject of installations...Coolant Pressure</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bill,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I had a coolant o-ring leak and =
replaced
it over Christmas. If I remember correctly I would see up 18 psi in =
flight. But
my coolant temps never get over about 190F. Inspection of the teflon =
<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>o-rings showed no detectable =
problems. But
the leak is gone and WP is lower.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bobby<o:p></o:p></span></font></p>
<div>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'> </span></font><o:p></o:p></p>=
</div>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
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face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>
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</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
<st1:PersonName
w:st=3D"on">Rotary motors in aircraft</st1:PersonName>
[mailto:flyrotary@lancaironline.net] <b><span =
style=3D'font-weight:bold'>On
Behalf Of </span></b>Bill Bradburry<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, March 24, =
2011
3:54 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> <st1:PersonName =
w:st=3D"on">Rotary
motors in aircraft</st1:PersonName><br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [FlyRotary] Re: =
On the subject
of installations...Coolant Pressure</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Kelly,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I think I would be getting air into =
the
system if that were the case. After I have drained the system for
whatever reason, it takes a couple of engine runs to get all the air =
out, then
it seems to stay out.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bill B<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>
<hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1>
</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
<st1:PersonName
w:st=3D"on">Rotary motors in aircraft</st1:PersonName>
[mailto:flyrotary@lancaironline.net] <b><span =
style=3D'font-weight:bold'>On
Behalf Of </span></b>Kelly Troyer<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, March 24, =
2011
5:36 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> <st1:PersonName =
w:st=3D"on">Rotary
motors in aircraft</st1:PersonName><br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [FlyRotary] Re: =
On the
subject of installations...Coolant Pressure</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=3DMsoNormal><font size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;
font-family:Arial'>Bill,<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;
font-family:Arial'> Have you checked for compression leak into =
water
jacket ??.............Hopefully that is not it !!...............<br>
<o:p></o:p></span></font></p>
</div>
<p><font size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;font-family:Arial'>Kelly
Troyer<br>
</span></font><strong><b><font size=3D4 face=3DArial><span =
style=3D'font-size:13.5pt;
font-family:Arial'>"DYKE DELTA =
JD2"</span></font></b></strong><strong><b><font
size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;font-family:Arial'> =
</span></font></b></strong><strong><b><font
size=3D1 face=3DArial><span =
style=3D'font-size:7.5pt;font-family:Arial'>(Eventually)</span></font></b=
></strong><font
size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;font-family:Arial'><o:p></o:p></span></font></p=
>
<p><font size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;font-family:Arial'>"13B
ROTARY"_ Engine<br>
"RWS"_RD1C/EC2/EM2<br>
"MISTRAL"_Backplate/Oil Manifold<o:p></o:p></span></font></p>
<p><font size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;font-family:Arial'>"TURBONETICS"_TO4E=
50
Turbo<o:p></o:p></span></font></p>
<div>
<p class=3DMsoNormal><font size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D4 face=3DArial><span =
style=3D'font-size:14.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'>
<hr size=3D1 width=3D"100%" align=3Dcenter>
</span></font></div>
<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><b><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</spa=
n></font></b><font
size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'> Bill
Bradburry <bbradburry@bellsouth.net><br>
<b><span style=3D'font-weight:bold'>To:</span></b> <st1:PersonName =
w:st=3D"on">Rotary
motors in aircraft</st1:PersonName> =
<flyrotary@lancaironline.net><br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thu, March 24, 2011 =
4:30:31
PM<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [FlyRotary] Re: =
On the
subject of installations...Coolant Pressure</span></font><o:p></o:p></p>
<div>
<p class=3DMsoNormal><st1:place w:st=3D"on"><st1:City w:st=3D"on"><font =
size=3D2
color=3Dnavy face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
color:navy'>Lynn</span></font></st1:City></st1:place><font size=3D2 =
color=3Dnavy
face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>,</span></font><o=
:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>You have hit my quandary squarely =
on the
head. Assuming that the pressure was zero at room temp and rose to =
say
6-7 pounds at 200 degrees, and assume that the flow restriction in the =
system
caused a pressure rise of about 2 pounds at 2000 rpm and a pressure rise =
of,
say, 6-7 pounds at 6000 rpm. Under that scenario, you would have a
pressure that ran at between 7-9 pounds at 2000 and rose to 12-14 pounds =
at
6000. Those pressures would be easily contained with the stock cap =
of 14
pounds. And the pressure would be constantly changing with rpm and
possibly temp of the system as you were under power or =
not.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I have a 21 pound cap. My =
system
climbs smartly to the top and stays there. No fluctuation with =
rpm, no
real fluctuation at temp because it has already hit the 21 pounds before =
the
engine is actually hot. (around 190)</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Something is wrong and I =
don’t
understand what it is.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bobby</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I am going to insert answers to =
your
questions in your msg below.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bill B</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>
<hr size=3D2 width=3D"100%" align=3Dcenter tabIndex=3D-1>
</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
<st1:PersonName
w:st=3D"on">Rotary motors in aircraft</st1:PersonName> =
[mailto:flyrotary@lancaironline.net]
<b><span style=3D'font-weight:bold'>On Behalf Of =
</span></b><st1:PersonName
w:st=3D"on">Bobby J. Hughes</st1:PersonName><br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, March 24, =
2011
1:57 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> <st1:PersonName =
w:st=3D"on">Rotary
motors in aircraft</st1:PersonName><br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [FlyRotary] Re: =
On the
subject of installations...Coolant Pressure</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bill,</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>This is all I can think of at the =
moment. </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Are you running a thermostat or did =
you
plug the hole between the inlets and outlets of the water pump? =
</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>No thermostat. The Renesis has =
a
thermostat tower which is too tall to fit under my cowl, so I removed it =
and
fabricated a flat plate with two 1.25 aluminum tubes for the inlet and =
outlet
of the water pump. That hole you are referencing exists in the =
tower, but
not in my plate.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>If plugged did you drill a small =
hole in
the plug to allow air a place to escape? I used a #30 drill. =
</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>Any air in my system would have to =
be
carried to the highest point, (radiator cap) then be forced by pressure =
to the
bottom of the swirl tank where it would be trapped. This seems to =
be
working because I have found that after I open the system for some =
reason, the
level in the swirl tank will go down and there is never any air at the =
top of
the radiator.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>After an engine run is the radiator =
the
same temperature at the inlet / outlet / bottom and top? If I have =
trapped air only
part of my radiator gets hot to the touch. Dual pass barrier =
leaking?</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>Seems to be. I have mistakenly =
laid
my arm on the top of the radiator after a run…usually I manage to =
get off
pretty fast! :>) I can not see into the radiator tank on =
the
barrier side. It is possible it could be leaking. I suppose =
if
there was a rag in the thing it could be trapped here also. I have =
no way
to see in there even if the hose was removed. I would need some =
kind of
flexible camera or something like that.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Use an extra CHT channel and clamp =
it to
the inlet of your radiator to measure Delta =
T.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>Good idea. I will have to rig =
one
up. I don’t have an extra now.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>My water pressure does not vary =
that much
in operation. But it does hold a little pressure for a few days after =
shutdown.
1-2 psi. </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>What is your pressure during
operation? What is the pressure cap rating? Does it vary at =
all
with temp and/or rpm? Mine is maxed =
out..always!</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>What size hoses? I’m running =
1in. </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>The RX-8 uses 1.25 hoses. I =
stuck
with that size as well.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Where are you measuring water =
pressure?
</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>The hose that comes off the top of =
the rear
iron goes to the top of the radiator, just below the cap. A tee in this =
line
has the water pressure sender in it. The radiator cap is just a =
cap, not
a pressure cap. The outlet in the radiator neck goes to the bottom =
of the
swirl tank.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Is your pressure cap on the bleed / =
swirl
tank?</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>Yes.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Any pictures of the =
plumbing?</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dred face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:red'>Not of the current =
setup.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bobby</span></font><o:p></o:p></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>
<hr size=3D2 width=3D"100%" align=3Dcenter tabIndex=3D-1>
</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
<st1:PersonName
w:st=3D"on">Rotary motors in aircraft</st1:PersonName> =
[mailto:flyrotary@lancaironline.net]
<b><span style=3D'font-weight:bold'>On Behalf Of </span></b>Bill =
Bradburry<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, March 24, =
2011
10:23 AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> <st1:PersonName =
w:st=3D"on">Rotary
motors in aircraft</st1:PersonName><br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [FlyRotary] On =
the
subject of installations...Coolant Pressure</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I need some help with figuring out =
my
cooling problems.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Just so it doesn’t get lost =
in the
following BS, I need to state that I think the problem is related to the
coolant pressure. It seems to me to be way too high. I am =
beginning
to think that the coolant is somehow partially =
blocked.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Now the rest of the =
story….</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>After I did the flight described in =
the
attached email, I installed an opening in the bottom of the cowl that =
would
work something like a cowl flap that is permanently open. The new =
opening
is 9 inches by 5 inches or 54 sq in.. There is a flare in front of =
the
opening that is at an angle of 45 degrees and extends down into the =
airstream
about 4 inches. (it is 6 inches long.) This opening is in =
addition
to two 6 X 6 openings, one of which has a 3 inch diameter exhaust pipe =
in it.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>This helped a little, but nothing =
like I
expected it would. The pressure inside the radiator inlet dropped =
from 10
inches of water to 8 inches of water. (by the way, Steve was right =
about
it being inches of water and not inches of =
Hg.)</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>The pressure after the radiator and =
inside
the cowl dropped to 8 inches as well. The temperature of the water
dropped to 208 and the oil a couple of degrees. Neither of these =
had the
result that I expected.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>My water pressure cap is rated at =
21
lbs. I have not calibrated the sender that came with my EM-2 and =
it shows
3 lbs when the engine is cold. I assume that this is zero. =
When in
flight the pressure climbs to 24 lbs and stays there. I assume =
that at
this point, the cap is at 21 lbs and is bleeding off air. There is =
about
a pint to a quart of air above the coolant in the bleed =
tank.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>This morning I ran the engine on =
the
ground for about 10-15 minutes at an rpm of 3000 to 3200. The OAT =
was 75
degrees.</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I read the temps and pressures =
every
minute or two during the run. I hope this doesn’t get =
jumbled
during transmission. </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Oil temp –
&=
nbsp; 80
103
130 &nbs=
p;
139 &nbs=
p;
144
155 =
162
165</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Air temp after cooler -
&=
nbsp; 97
109 &nbs=
p;  =
;
122
129
133 =
134</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Water temp
- =
86 126
161 &nbs=
p;
173 &nbs=
p;
178
190
198 =
199</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Air temp after rad
- =
109
133 &nbs=
p;  =
;
157
169
179 =
183</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Water pressure
- =
2
11
17 =
20  =
;
21  =
; =
24 </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I noticed that the water pressure =
could be
brought from 2 lbs to 9 lbs by changing the rpm while the engine was =
still
relatively cool</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>What should I expect for water =
pressure at
lower temps and how could I go about making a determination that the =
water
passages are clear?</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I am beginning to think that a rag =
has
been left either in the engine or the radiator. I have never torn =
the
engine down and I sent the radiator out to have a leak repair a couple =
of years
ago. It is a double pass radiator. I can look into the end =
that has
both sides connected thru the radiator cap neck, but not into the inlet =
and
outlet end. </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Suggestions???</span></font><o:p></o=
:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Thanks,</span></font><o:p></o:p></p>=
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bill B</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>
<hr size=3D2 width=3D"100%" align=3Dcenter tabIndex=3D-1>
</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> Bill =
Bradburry
[mailto:bbradburry@bellsouth.net] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Sunday, March 20, =
2011 5:29
PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> ' <st1:PersonName =
w:st=3D"on">Rotary
motors in aircraft</st1:PersonName> '<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> On the subject =
of
installations...</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
<div>
<div id=3D"AOLMsgPart_2_743997a6-b936-461a-873c-a97afc4b6323">
<div>
<div>
<div>
<div>
<div>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>My water temp has been running =
between 199
and 217, depending on the OAT. The oil is pretty steady at around
175. Today I finally got to fly with pressure probes inside the
cowling. I was all set to try and enlarge the inlet to the =
radiator to
solve the problem. It turns out that “in” is not the =
problem,
it is “out” that is the =
problem!</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I have 10 inches of Hg pressure in =
the
radiator inlet and 10 inches of Hg on the outlet side as well as the =
same
pressure everywhere I measured inside the cowl. I need to open up =
the
cowl some so more air can get out. I had considered a cowl flap =
but that
would not work in this instance because the problem is at cruise. =
I need
a permanent opening. I am considering louvers and I am looking for =
a
source. I know some of you are using them. Where did you get =
them
and how are they installed so that they look =
ok?</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I am also considering some kind of =
flare
around the exit area to create a low pressure area to help suck air =
out.
Do any of you have those and do they seem to =
work?</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>While I look into this, I also need =
to do
something about my muffler…Thank you, =
Bobby!</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I wonder about that spiral muffler =
some of
you are trying??</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Bill B 9 hours and =
counting…</span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>By the way, I was considering =
putting a 1
or 2 inch wide piece of cardboard across the bottom of the oil cooler to
partially block it in the hopes that more air would then flow through =
the
radiator. Sort of like truckers do with the radiator in cold =
weather.
What opinions do you have about that idea? I realize it would make =
more
sense if the oil was really cool, but I think the oil might not get much =
hotter
if an inch or so was blocked. What do you =
think???</span></font><o:p></o:p></p>
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