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Ted French
Joined: 09 Jan 2006
Posts: 54
Location: Kelowna BC Canada
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 Posted: Thu Dec 14, 2006 7:38 am Post subject: I0-540 hottest cylinder |
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I have installed two Lasar mags on my 10. The controller needs to read the
cylinder head temperature of the hottest running cylinder on the engine. I
am assuming that would be #5 or #6 but don't know which.
What are the flying 10's showing as the hot cylinder ?
I'm wiring firewall forward, and I know if I guess I'll get it wrong :>)
Ted French
RV-10 C-FXCS reserved
firewall forward, some painting done.
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_________________
Ted French
RV-10 fuselage |
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flysrv10(at)gmail.com
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| Posted: Thu Dec 14, 2006 7:59 am Post subject: I0-540 hottest cylinder |
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My hottest is no. one cylinder.
do not archive
Rob Kermanj
On Dec 14, 2006, at 10:37 AM, Ted French wrote:
[quote]--> RV10-List message posted by: "Ted French" <ted_french(at)telus.net (ted_french(at)telus.net)>
I have installed two Lasar mags on my 10. The controller needs to read the
cylinder head temperature of the hottest running cylinder on the engine. I
am assuming that would be #5 or #6 but don't know which.
What are the flying 10's showing as the hot cylinder ?
I'm wiring firewall forward, and I know if I guess I'll get it wrong :>)
Ted French
RV-10 C-FXCS reserved
firewall forward, some painting done.
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[b]
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Tim(at)MyRV10.com
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| Posted: Thu Dec 14, 2006 8:06 am Post subject: I0-540 hottest cylinder |
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I think in my case it would be 1 or 2.
Tim Olson - RV-10 N104CD - Flying
do not archive
Ted French wrote:
| Quote: |
I have installed two Lasar mags on my 10. The controller needs to read the
cylinder head temperature of the hottest running cylinder on the engine. I
am assuming that would be #5 or #6 but don't know which.
What are the flying 10's showing as the hot cylinder ?
I'm wiring firewall forward, and I know if I guess I'll get it wrong :>)
Ted French
RV-10 C-FXCS reserved
firewall forward, some painting done.
|
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billderou(at)yahoo.com
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| Posted: Thu Dec 14, 2006 8:43 am Post subject: I0-540 hottest cylinder |
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Tough question Ted - you will not know the answer until you have approximately 50 hours on the aircraft (assuming you have a new/rebuilt engine). You may need alternations with the air dams in front of cyls 1 & 2 to change the temps around a bit. My cht's did not settle down for 50 hours. Now my pattern looks like: 330,335,315,315,335,340 during cruise.
Suggest you hook one up to #5 and the other electronic box to #6.
Bill DeRouchey
billderou(at)yahoo.com (billderou(at)yahoo.com)
Flying
Ted French <ted_french(at)telus.net> wrote:
[quote]--> RV10-List message posted by: "Ted French"
I have installed two Lasar mags on my 10. The controller needs to read the
cylinder head temperature of the [quote][b]
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randy(at)romeolima.com
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| Posted: Thu Dec 14, 2006 9:38 am Post subject: I0-540 hottest cylinder |
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| Quote: | I have installed two Lasar mags on my 10. The controller needs to read the
cylinder head temperature of the hottest running cylinder on the engine. I
am assuming that would be #5 or #6 but don't know which.
What are the flying 10's showing as the hot cylinder ?
Ted French
RV-10 C-FXCS reserved
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Ted,
Sounds like you already have your controller, but LASAR is available without
the CHT sensor circuit for experimentals (but is required for certified
installations). The CHT sensor is a known problem area. Once you're flying
if you get faults (red indicator light comes on indicating it has gone into
conventional mag mode) be sure and check the connection on the CHT sensor
wire, it is super sensitive.
What the CHT sensor circuit does is to start retarding the timing if it
senses CHTs over about 425. It is progressive and starts of with a small
retard then increases it if temps go higher. Be sure and have your LASAR
system powered by a switch or breaker switch, there may be times in hot
conditions where you want to do your climbout with it turned off thus
forcing it into conventional mag mode, then turn it back on once you level
off. Any electronic ignition will cause your engine to run hotter since it
is burning the fuel/air charge more completely and efficiently inside the
combustion chamber and thus transferring more heat to the cylinders.
Randy Lervold
RV-3B, almost done (www.rv-3.com)
RV-8, 368 hours & sold (www.rv-8.com)
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wayne.e(at)grandecom.net
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| Posted: Fri Dec 15, 2006 4:43 am Post subject: I0-540 hottest cylinder |
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On the issue of hottest cylinder. I bought my engine from Aero Sport Power with the Lasar system and they test ran the engine before shipping it to me and included a printed report with the engine when they delivered it. From this report I could figure out which was the hottest cylinder.
Depending on where you got your engine, maybe it's in the paper work they sent.
Wayne Edgerton #40336
[quote][b]
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jesse(at)itecusa.org
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| Posted: Fri Dec 15, 2006 5:30 am Post subject: I0-540 hottest cylinder |
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The hottest cylinder on an airplane depends on cooling, which depends on your cowl and baffles. IMHO there is no way to be sure the hottest cylinder in their test will be the hottest in your plane. You could setup the Lasar for the hottest in the test and then change it when you have some time to establish which one is hottest in the air.
Do not archive.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org (jesse(at)itecusa.org)
www.itecusa.org
W: 352-465-4545
C: 352-427-0285
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Wayne Edgerton
Sent: Friday, December 15, 2006 7:42 AM
To: rv10-list(at)matronics.com
Subject: Re: I0-540 hottest cylinder
On the issue of hottest cylinder. I bought my engine from Aero Sport Power with the Lasar system and they test ran the engine before shipping it to me and included a printed report with the engine when they delivered it. From this report I could figure out which was the hottest cylinder.
Depending on where you got your engine, maybe it's in the paper work they sent.
Wayne Edgerton #40336
| Quote: | | www.aeroelectric.com |
0123456789012345
-- Release Date: 12/14/2006 7:28 PM
--
12/14/2006 7:28 PM
[quote][b]
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Ted French
Joined: 09 Jan 2006
Posts: 54
Location: Kelowna BC Canada
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| Posted: Fri Dec 15, 2006 8:13 am Post subject: I0-540 hottest cylinder |
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Thanks guys. I have put the probe on #1 for now. I'll leave enough extra wire lengths to move it later if necessary. My feeling right now is that the baffles in front of #1 & #2 make these two run hottest if they are not cut down. Seems to me that one can cut them down to the point where #1 might run just a little hotter than the others and can therefore be used to control the Lasar timing.
Gotta love the list....
Ted French
RV-10 wiring
[quote] --
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_________________
Ted French
RV-10 fuselage |
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