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smirdrv(at)hotmail.com
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 Posted: Thu Aug 19, 2010 6:13 am Post subject: Best Location |
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What is the best location (which cylinder) to install a single CHT/EGT for an O-320 Carb'd Lyc.?
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khorton01(at)rogers.com
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| Posted: Thu Aug 19, 2010 6:49 am Post subject: Best Location |
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On Thu, Aug 19, 2010 at 07:12:14AM -0700, R.C. Flyer wrote:
| Quote: |
What is the best location (which cylinder) to install a single CHT/EGT for an O-320 Carb'd Lyc.?
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That varies from aircraft to aircraft, depending on the details of your cylinder baffling and how the fuel is distributed. The big manufacturers would do flight testing with four cylinder CHT and EGT, and based on those results they would decide which cylinder to put single CHT and EGT for production aircraft.
Note that the cylinder that hits peak EGT first can vary depending on power level. Also note that some engine problems can cause one cylinder to suddenly have a high CHT or EGT. If you only have CHT and EGT on one cylinder you may not get indications of these problems. Given that the cost of a full four cylinder EGT and CHT system is much, much less than the cost of an engine, I believe it is a false economy to go with a single cylinder system.
--
Kevin Horton
Ottawa, Canada
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robin(at)PaintTheWeb.com
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| Posted: Thu Aug 19, 2010 8:40 am Post subject: Best Location |
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The best location is to dump a single CHT/EGT unit in favor of monitoring all 4 CHT’s & EGT’s. While many aircraft for years were happy to have one cylinder reading with modern equipment & technology having complete engine info is definitely the way to go if you can.
Robin
D0o Not Archive
From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of R.C. Flyer
Sent: Thursday, August 19, 2010 7:12 AM
To: rv-list(at)matronics.com (rv-list(at)matronics.com)
Subject: Best Location
What is the best location (which cylinder) to install a single CHT/EGT for an O-320 Carb'd Lyc.? | Quote: |
Use the Matronics List Features Navigator to browse[/b][/b] |
Day Browse, Chat, FAQ,[/b]w.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-Li
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n212pj(at)gmail.com
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| Posted: Fri Aug 20, 2010 7:26 am Post subject: Best Location |
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Agree with Kevin about economies, but a simple answer is #4, in most setups. Go for all 4, if u can. Best choice.
..via phone
On Aug 19, 2010, at 8:49 AM, Kevin Horton <khorton01(at)rogers.com> wrote:
| Quote: |
On Thu, Aug 19, 2010 at 07:12:14AM -0700, R.C. Flyer wrote:
>
> What is the best location (which cylinder) to install a single CHT/EGT for an O-320 Carb'd Lyc.?
That varies from aircraft to aircraft, depending on the details of your cylinder baffling and how the fuel is distributed. The big manufacturers would do flight testing with four cylinder CHT and EGT, and based on those results they would decide which cylinder to put single CHT and EGT for production aircraft.
Note that the cylinder that hits peak EGT first can vary depending on power level. Also note that some engine problems can cause one cylinder to suddenly have a high CHT or EGT. If you only have CHT and EGT on one cylinder you may not get indications of these problems. Given that the cost of a full four cylinder EGT and CHT system is much, much less than the cost of an engine, I believe it is a false economy to go with a single cylinder system.
--
Kevin Horton
Ottawa, Canada
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