A bad heat range spark plug can ruin your whole day and
    lead to loss of power and a broken apex seal. I have formated
    the thread on on this subject and uploaded it to the web site.
    Please read:http://www.rotaryeng.net/ignition.html

    "All about spark plugs for rotary engines."

    Thanks to Joe Hull for discovering this.

    If anybody has anything else to add please upload your
    thoughts.
    --
    Paul Lamar ...No rotor no motor.


Ok,
I've got a '93 13BREW, normally aspirated, with the original rotors-9/1
compression. The spark plugs I have in it are NGKs  the leading splugs
are BUR7EQ(Leading), and BUR9EQ(Trailing). They are brand new, and I
think they are what are recommended as stock in the auto application.
Should I go to BUR9EQ leading and BUR11EQ Trailing?

Anyone?

Thanks

Brian Trubee

I would use them while you are running the engine on the ground.
When you get ready to fly install the colder plugs.
http://www.rotaryeng.net/Spark-plugs/plugcolorchart2.html

Paul Lamar ...No rotor no motor.

  I run BUR9EQP  on both leading and trailing, I tried running the
7s when I first flew it and it melted the electrodes off in short
order, the P on the end is for platinum and I have found that they
last much longer.
Ken Welter



The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2006 All world wide rights reserved.