[Gasification] colortune plugs

[Arnt Karlsen]

On Fri, 25 Feb 2011 12:23:53 -0800, jamast wrote in message 
<5042747A63AB45D58B9ABF2CAA78CDD4 at jamast>:

> On Thu, 24 Feb 2011 22:20:29 +0100, Arnt wrote in message 
> <20110224222029.77180740 at celsius.local>:
> 
> > On Mon, 21 Feb 2011 15:47:46 +1300, Tony.Batchelor wrote in message 
> > <AFDAE51957292F4A822CE0CC3DFBE998018E6B5F48B0 at TCSEXCCR.correspondence.school.nz>:
> > > 
> > > Getting the Air/fuel ratio correct is also vital.  Using a
> > > "colortune" sparkplug is the best way to really know when you have
> > > the correct mixture as you can see the flame color within the
> > > combustion chamber.
> > 
> > ..hum.  That assumes we know right shade of blue (or green or
> > violet?).  And at least I don't. ;o)  Has anyone played with
> > colortune spark plugs and 
> 
> > ... wide-band lambda sensors ...
> 
> > on wood gas?
> 
> ..........i have used various transparent plugs for years, but of
> late, computers do the job better, between a cheap gas analyser and a
> laser thermometer you can pretty well pinpoint any problem
> quickly..   for multiple cylinders colortune plugs might be helpful
> in finding obstructions, very rare though.. 

..much more common is getting gas and vapor flows wrong, giving you the 
odd too-lean cylinder next to the too rich one e.g. after polishing the
_wrong_ spot.  Channels are rough for tough boundary layer reasons. ;o)

> the common use would of course be mixture control and you're right,
> the color can be tricky to get just so.. i've used a lambda with a
> built in heater, great for gasoline but it was confused by wood gas,

..confused, confused how?

> i'll try it again and post
> robert saint amour


-- 
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.