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

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.

Any plug with its top sawed off is an odd animal

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

Chris

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

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

You would want a RDJ6/7J or a BPMR6F

Thanks guys!

Chris

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