i have burned out numerous coils over the years so mounted mine way out the way on the firewall and fed them with one inch tube from top plenum . definatly made a difference phill uk
________________________________ From: Dene Collett <av...@telkomsa.net> To: KRnet <kr...@mylist.net> Sent: Wed, March 9, 2011 10:34:21 AM Subject: KR> revmaster coil temp tolerances Hi guys This post is not KR specific but is related to flying revmaster motors. As many of you will remember I made quite an elaborate cooling plenum chamber that covers the top of the motor. I am pleased to report that not only are the CHT's within limits but almost on the low side. That plenum cover works! I would like to know if there are any KR's flying with Revmaster motors equipped with quad CDI ignition. The reason I ask is that after the maiden test flight on Sunday of my latest Whisper motor glider that lasted approx 1/2 hour, it stood for a few minutes on the ramp before it was decided to take it up again. The motor was stone dead. We could not even get a backfire out of it. After taking the top cowl off and feeling the CDI coils we found them to be very hot due to heatsoak from sitting in the hot environment under the cowl. The cooling plenum I made excludes the inlet runners and the CDI coils mounted to them. My question is what kind of temperatures can I expect these coils to handle before it begins to break down? I went out to the field yesterday and attempted to start it, it fired right up and ran smoothly. Regards Dene Collett Avlec Projects cc Builders of fine kit aircraft. Port Elizabeth South Africa _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
