Today's Message Index:
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1. 09:30 AM - Re: Re: RV-8 Cowl Vents (Matt Dralle)
2. 01:44 PM - Re: Re: RV-8 Cowl Vents (japhillipsga@aol.com)
3. 06:55 PM - Re: Re: RV-8 Cowl Vents (Matt Dralle)
4. 08:07 PM - Re: RV-8 Cowl Vents (Speedy11@aol.com)
Message 1
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| Subject: | Re: RV-8 Cowl Vents |
Oh, my... I missed the part where you had installed the air dam baffle in front
of #1! Get rid of that completely. The Baffle Plans say to start *without*
this baffle and then add it IF #1 is running too cool. I never installed this
air dam and have never had any problems with #1.
Matt
-
Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
At 09:06 PM 8/9/2011 Tuesday, you wrote:
>Stan, I tested the CHT probes and they are correct. I have the standard Van's
baffle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch off the top
and noted a small drop in CHT tempt, but it did not even out with the other
three jugs. I'll just not worry about it until after I get the wheel pants and
leggings all installed. Thanks for the help, Bill
>
>
>-----Original Message-----
>From: Speedy11 <Speedy11@aol.com>
>To: rv8-list <rv8-list@matronics.com>
>Sent: Tue, Aug 9, 2011 11:35 pm
>Subject: RV8-List: Re: RV-8 Cowl Vents
>
>Bill,
>I sure agree with Matt on this subject. I would investigate other causes for
the high CHT before cutting up the cowling. I would cut the cowling only if all
CHTs were too high.
>His ideas are good ones and you also might try swapping the #1 and #3 CHT probes.
Maybe #1 is reading high.
>It is very odd that #1 cylinder would be your hot one. Did you add an air dam
in front of it? If so, have you tried different size dams? Or removing the
air dam?
>
>Stan Sutterfield
>Do not archive
>
>In a message dated 8/9/2011 3:09:02 A.M. Eastern Daylight Time, <mailto:rv8-list@matronics.com>rv8-list@matronics.com writes:
>Before you start cutting holes in your cowling, you might want to do some more
>investigation into the cause of the overheating. Might be indicative of something
>else. Plugged oil line to that cylinder, maybe a blocked fuel injector on
>that cylinder? Try swapping the injectors between the hottest and coolest cylinder
>and see what impact this has on the CHT.
>
>
Message 2
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| Subject: | Re: RV-8 Cowl Vents |
Matt, I'll do that before I fly again. BTW How is the rebuild coming? We a
ll expect to see her better and
faster than before. Thanks, Bill
-----Original Message-----
From: Matt Dralle <dralle@matronics.com>
Sent: Wed, Aug 10, 2011 12:31 pm
Subject: Re: RV8-List: Re: RV-8 Cowl Vents
Oh, my... I missed the part where you had installed the air dam baffle in
front
f #1! Get rid of that completely. The Baffle Plans say to start *without*
his baffle and then add it IF #1 is running too cool. I never installed th
is
ir dam and have never had any problems with #1.
Matt
-
att Dralle
V-8 #82880 N998RV "Ruby Vixen"
ttp://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
ttp://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
ttp://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
tatus: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
t 09:06 PM 8/9/2011 Tuesday, you wrote:
Stan, I tested the CHT probes and they are correct. I have the standard Van
's
affle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch off the
top
nd noted a small drop in CHT tempt, but it did not even out with the other
hree jugs. I'll just not worry about it until after I get the wheel pants a
nd
eggings all installed. Thanks for the help, Bill
-----Original Message-----
From: Speedy11 <Speedy11@aol.com>
Sent: Tue, Aug 9, 2011 11:35 pm
Subject: RV8-List: Re: RV-8 Cowl Vents
Bill,
I sure agree with Matt on this subject. I would investigate other causes f
or
he high CHT before cutting up the cowling. I would cut the cowling only if
all
HTs were too high.
His ideas are good ones and you also might try swapping the #1 and #3 CHT
robes. Maybe #1 is reading high.
It is very odd that #1 cylinder would be your hot one. Did you add an air
dam
n front of it? If so, have you tried different size dams? Or removing th
e
ir dam?
Stan Sutterfield
Do not archive
In a message dated 8/9/2011 3:09:02 A.M. Eastern Daylight Time,
mailto:rv8-list@matronics.com>rv8-list@matronics.com writes:
Before you start cutting holes in your cowling, you might want to do some m
ore
investigation into the cause of the overheating. Might be indicative of
omething
else. Plugged oil line to that cylinder, maybe a blocked fuel injector on
that cylinder? Try swapping the injectors between the hottest and coolest
ylinder
and see what impact this has on the CHT.
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Message 3
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| Subject: | Re: RV-8 Cowl Vents |
The rebuild is coming alone nicely. Definitely going faster the second time.
I'm shooting to re-test fly in the Spring. Just getting ready to start the wiring
this weekend. With the wiring complete, how much more could there be? <smirk>
Matt
At 01:40 PM 8/10/2011 Wednesday, you wrote:
>Matt, I'll do that before I fly again. BTW How is the rebuild coming? We all
expect to see her better and
>faster than before. Thanks, Bill
>
>
>-----Original Message-----
>From: Matt Dralle <dralle@matronics.com>
>To: rv8-list <rv8-list@matronics.com>
>Sent: Wed, Aug 10, 2011 12:31 pm
>Subject: Re: RV8-List: Re: RV-8 Cowl Vents
>
>
>
>Oh, my... I missed the part where you had installed the air dam baffle in front
>of #1! Get rid of that completely. The Baffle Plans say to start *without*
>this baffle and then add it IF #1 is running too cool. I never installed this
>air dam and have never had any problems with #1.
>
>Matt
>
>-
>Matt Dralle
>RV-8 #82880 N998RV "Ruby Vixen"
><http://www.mattsrv8.com/>http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
><http://www.mattsrv8.com/Mishap>http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
><http://www.youtube.com/MattsRV8>http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
>Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
>
>
>At 09:06 PM 8/9/2011 Tuesday, you wrote:
>>Stan, I tested the CHT probes and they are correct. I have the standard Van's
>baffle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch off the top
>and noted a small drop in CHT tempt, but it did not even out with the other
>three jugs. I'll just not worry about it until after I get the wheel pants and
>leggings all installed. Thanks for the help, Bill
>>
>>
>>
>>-----Original Message-----
>>From: Speedy11 <<mailto:Speedy11@aol.com>Speedy11@aol.com>
>>To: rv8-list <<mailto:rv8-list@matronics.com>rv8-list@matronics.com>
>>Sent: Tue, Aug 9, 2011 11:35 pm
>>Subject: RV8-List: Re: RV-8 Cowl Vents
>>
>>Bill,
>>I sure agree with Matt on this subject. I would investigate other causes for
>the high CHT before cutting up the cowling. I would cut the cowling only if all
>CHTs were too high.
>>His ideas are good ones and you also might try swapping the #1 and #3 CHT
>probes. Maybe #1 is reading high.
>>It is very odd that #1 cylinder would be your hot one. Did you add an air dam
>in front of it? If so, have you tried different size dams? Or removing the
>air dam?
>>
>>Stan Sutterfield
>>Do not archive
>>
>>In a message dated 8/9/2011 3:09:02 A.M. Eastern Daylight Time,
><<mailto:rv8-list@matronics.com%3Erv8-list@matronics.com?>mailto:rv8-list@matronics.com>rv8-list@matronics.com writes:
>>Before you start cutting holes in your cowling, you might want to do some more
>>investigation into the cause of the overheating. Might be indicative of
>something
>>else. Plugged oil line to that cylinder, maybe a blocked fuel injector on
>>that cylinder? Try swapping the injectors between the hottest and coolest
>cylinder
>>and see what impact this has on the CHT.
>>
>>
>
>
>et=_blank>http://www.matronics.com/Navigator?RV8-List
>p://forums.matronics.com
>blank>http://www.matronics.com/contribution
>
>
Matt G Dralle | Matronics | 581 Jeannie Way | Livermore | CA | 94550
925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email
http://www.matronics.com/ WWW | Featuring Products For Aircraft
Message 4
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| Subject: | Re: RV-8 Cowl Vents |
Bill,
I initially flew my RV with no dam in front of #1 cylinder. It was
running about 30 degrees cooler than the others so I added a "ski ramp" air dam
that is easily replaced. I can try different shapes and sizes until I get
the temp just right. I've never liked the blunt, brute force air dams
placed in front of cylinders, so I made a more aerodynamic, easily replaceable,
easily modified air dam. You can see a photos and comments at
_http://www.rv-8a.net/2009Jul.htm_ (http://www.rv-8a.net/2009Jul.htm) and
_http://www.rv-8a.net/2010Jun.htm_ (http://www.rv-8a.net/2010Jun.htm)
Stan Sutterfield
In a message dated 8/10/2011 3:07:05 A.M. Eastern Daylight Time,
rv8-list@matronics.com writes:
I tested the CHT probes and they are correct. I have the standard Va
n's baffle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch of
f the top and noted a small drop in CHT tempt, but it did not even out with
the other three jugs. I'll just not worry about it until after I get the w
heel pants and leggings all installed.
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