REFLECTOR: Running LOP -- Climbing or Cruising

[aminetech at bluefrog.com]

Are you saying the cooler plug has a shorter center electrode?  Can I file mine off to make them shorter?  I'm planning to get some cooler plugs, but they won't come until next month and I really need to keep flying now.

John

--- sbjknox at earthlink.net wrote:

From: "sbjknox" <sbjknox at earthlink.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Subject: Re: REFLECTOR: Running LOP -- Climbing or Cruising
Date: Fri, 12 Nov 2010 00:12:13 -0600

>> That's interesting.  I'm currently have spark plug issues and I'm
>> planning to try a cooler plug.  Could I simply add a washer to my
>> existing plugs to get less reach and effectively make it cooler?
>> John

My opinion (not a fact) is just the opposite.  The washer would create a 
longer path for heat to flow from the plug body to the cylinder.  You want a 
lower heat-resistant (shorter)  path from center electrode to the cyl...that 
is why a colder plug will have a shorter exposed (exposed to the hot 
combustion gas) center electrode insulator.

Sid Knox
Oklahoma

Velocity  173 RG  N199RS
Starduster  N666SK
KR2         N24TC
W7QJQ

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