flyrotary@lancaironline.net Mailing List Archive

Seems that this will tell you the coolant temp near the plugs, but not the CHT. If you want to measure the CHT, you'll need to locate a thermo-couple down near the steel liner. You can do this by drilling a small hole down into the web adjacent to the leading plug, stopping at the steel liner. Then insert a thermo-couple down into the hole so that it is touching the steel liner. Now you're reading the temps nearest the combustion chamber, closest thing we have to CHT.

Mark

On Sun, Aug 19, 2012 at 10:02 AM, <hoursaway1@comcast.net> wrote:

Sounds like a plan to me Ed, should have time Sun. to do. David

From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, August 18, 2012 6:54:35 AM
Subject: [FlyRotary] Re: EM2 CHT ?

I think I would run the engine at operational rpms (>5000) and watch the coolant/oil temperatures - when they got to my maximum limit, I would check the CHT reading and perhaps add 50 degrees for the limit (to start with). If I got a lot of false alarms at that margin I would try another 50 deg. Just a WAG.

Ed

From: hoursaway1@comcast.net

Sent: Friday, August 17, 2012 10:20 PM

To: Rotary motors in aircraft

Subject: [FlyRotary] EM2 CHT ?

What are we using for high temp numbers from the CHT sensors on the 13B rotary, I have the under the spark plug style sensors bolted to each rotor housing in some factory threaded holes just above the spark plugs, not really the hottest spot but the holes were already in place so I KISSed it & moved on, now I need to set my high temp warning limit & do not know what to use. Possibly do an eng. run with upper cowl off & check bolt/sensor temp with a lazer temp gun at about 4000 RPM & go another 50 deg. higher? Ideas? David R. Cook RV6A Rotary

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