----- Original Message -----

From: rijakits

To: Rotary motors in aircraft

Sent: Monday, November 29, 2004 9:13 PM

Subject: [FlyRotary] Re: Oil leak at filter solved (unshrouded plug ?)

Okay Paul,

 

here we go:

NGK BR9EQ, means B dia.14mm, R Resistor Type (I think that cuts on radio interference...),  9 Heatrange 9 (2-11, hot to cold), E Threadreach 19mm, Q 4-ground electrode

NGK B9EGV, means B dia.14mm, 9 Heatrange 9, E Threadreach 19mm, GV Gold-palladium centre electrode, Special construction of V-type

 

Check the rest of NGK at http://www.spark-plugs.co.uk/pages/technical/ngk_symbol_code.htm

 

http://www.spark-plugs.co.uk/pages/technical/iridium_spark_plugs.htm   (open the drop down menu and read all of them!)

 

http://www.spark-plugs.co.uk/index.htm Lots of good info on sparkplugs, especially about multiple ground ones and iridium plugs

 

 

Thomas J.

 

----- Original Message -----

From: paul

To: Rotary motors in aircraft

Sent: Monday, November 29, 2004 9:29 PM

Subject: [FlyRotary] Re: Oil leak at filter solved (unshrouded plug ?)

Hi, Al....I have been using NGK BR9EQ plugs.  Then I tried some NGK B9EGV plugs, and I could not screw them all the way into my engine with my Craftsman deep socket, because the length of the plug left sticking out of the engine was still recessed partway into the spark plug hole, and the socket kept slipping off the hex portion of the plug, which would not allow me to tighten the plugs.  Both plugs are identical in length below the sealing washer....it's just that the height sticking out of the engine is shorter on the B9EGV plugs than it is on the BR9EQ plugs.  I went to AutoZone, and they substituted an Autolite 2526 plug for the BR9EQ, and it measures the same as the BR9EQ plug, and I could install it with a standard deep socket.   Unfortunately, I don't know what the R or the EQ stands for....just know they are much easier to install.  Perhaps someone can shed a little more light on this subject.  Thanks.  Paul Conner

 

----- Original Message -----

From: Al Gietzen

To: Rotary motors in aircraft

Sent: Monday, November 29, 2004 10:26 AM

Subject: [FlyRotary] Re: Oil leak at filter solved (unshrouded plug ?)

 

What are the make and number of the unshrouded plugs??

 

TIA,

Bernie

 

I’m using NGK B9EGV for both leading and trailing; recommended to me by Paul Yaw a few years ago. 

Ed; just guessing, but I think that Paul Yaw link you referenced is from about 1999.

 

There were a couple of times during the dyno runs that the engine got very flooded, but then started easily when we got the conditions corrected.

 

Al