Evolution Spark Plugs
 

Does anyone know of a locally available spark plug that fits the Evolution engines? The stock plug appears to be an odd animal. I'm currently running a 35 GT.

Thanks,
Chris

RE: Evolution Spark Plugs
 

what do yoy mean by "odd animal"
These are standard garden appliance plugs with the top sawed off to get a minimum package. you can take any equivalent resistor plug and adapt it yourself, so it will fit the Vlach ignition boot.

RE: Evolution Spark Plugs
 

Any plug with its top sawed off is an odd animal

RE: Evolution Spark Plugs
 

OK. Is there an equivalent NGK for example with the proper heat range, resistor, etc.

Chris

RE: Evolution Spark Plugs
 

Brisk UR 17, Champion DJ6J DJ7J, NGK BMR6F

Check out Pe's site as he knows the motors inside out

the NGK has a screw top, remove it and saw off the threads, dont know about the Champion, same procedure for a ZDZ

RE: Evolution Spark Plugs
 

Beware, The newer ignitions need The "R" (for resistor) types, and do not work well with standards plugs.
Brisk plugs are excellent quality.

RE: Evolution Spark Plugs
 

You would want a RDJ6/7J or a BPMR6F

RE: Evolution Spark Plugs
 

Thanks guys!

Chris

RE: Evolution Spark Plugs
 

TKG

The NGK plug you refer to is not the correct match. It has a projected electrode tip.

The correct matches to the Brisk UR 17 specified by MVVS/EVO for their motors are the following, which both work perfectly, when the top of the terminal is removed:

* Champion RDJ8J

* NGK BMR6F

Both are resistor plugs. I bought one of each.

I prefer the NGK as the insulator is a little shorter, and will not compress the spring in the plug cap as mutch. Also it is also easier to cut off the NGK plug's terminal top as it has a traditional screw thread nut you can remove, making for a thinner terminal post, whereas the Champion has a thick solid terminal, meaning it takes longer, and is slightly more tricky to take off the top cleanly. But really, both are a 1 minute job with a steady hand and your dremel cutting wheel or mini hack saw. I modified my plug by holding it sideways in a vice gripping the metal plug body which I wrapped in a bit of rag for scuff protection.

That said, I have used the champion RDJ8J (minus the terminal) in my MVVS 26 IFS as the mainstay plug from the start, and it has worked perfectly. The RDJ7J and RDJ6J I also tried early on ( I went a little OTT with plugs) were a little cool, and didn't develop a nice light tan colour on the insulator nose in my application.

OT:

Last week end I killed my MVVS 26 after two years weekly flying in a major instance of aeromodelling earth ~sky zen (when aircraft and terra firma become as one). I liked it so much I may get another.


Happy flying

fiery