Maybe unburned air/fuel is burning as it exits the exhaust port, raising the EGT.
-----Original Message-----
From: DLOMHEIM <DLOMHEIM@aol.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Fri, Mar 9, 2012 8:23 pm
Subject: [FlyRotary] Failure of an LS-1 D-580 type ignition coil
Tracy wrote: >As usual, the in-flight symptom was a rise in EGT on the affected rotor.
Can someone describe the science behind a "rise in EGT" when we lose a single coil. I would have expected a drop in EGT due to less thorough burning of the mixture and therefore excess un-burnt fuel which I thought would provide cooler temps of the exhaust stream as it passes the EGT probe.
Must be missing something very basic here...
Thanks for any clarity! :)
Doug Lomheim
RV-9A / 13B FWF