News:



  • May 01, 2024, 09:43:06 AM

Login with username, password and session length

« previous next »
Pages: [1]   Go Down

Author Topic: Burnt out Cox glow plug wanted (.049)  (Read 950 times)

Offline Chancey Chorney

  • Trade Count: (0)
  • Captain
  • *****
  • Posts: 621
Burnt out Cox glow plug wanted (.049)
« on: February 10, 2009, 06:12:33 PM »
Hi there. I have just rebuilt a Cox .049 engine and am missing the final ingredient. A glow plug. Would anybody happen to have a old burnt out non-working plug that I may aquire. I would like to try and make it fit a standard glow plug. I like little projects. I know I can buy them, or even a Cox glow plug head adapter, but I love to tinker. I also know that if I suceed, it would not be as good as the name brand head adapters, but I do not care, as this is just something I would like to do for myself. If anyone out there can help, please pm me. It would be greatly appreciated. Thank you.

Chancey

p.s.  this has been posted on another website as well(r/c site), so if you saw it there please disregard
« Last Edit: February 10, 2009, 08:38:23 PM by Chancey Chorney »
Logged

Offline jamtx

  • Trade Count: (0)
  • Ensign
  • **
  • Posts: 32
Re: Burnt out Cox glow plug wanted (.049)
« Reply #1 on: February 11, 2009, 11:23:55 AM »
 email sent.
Logged
James Karnes
Abilene,TX.

Offline Russell Shaffer

  • AMA Member
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1333
Re: Burnt out Cox glow plug wanted (.049)
« Reply #2 on: February 11, 2009, 11:39:19 AM »
Seems that you have at least one - I have one in front of me that you are welcome to. 
Logged
Russell Shaffer
Klamath Falls, Oregon
Just North of the California border

Offline kenneth cook

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 1466
Re: Burnt out Cox glow plug wanted (.049)
« Reply #3 on: February 12, 2009, 02:45:10 PM »
           I tried it with little success. The engine did run but performance was way down. The other problem I encountered was the initial tap hole was well into the area that the wrench fits. The area the wrench fits onto ripped off after a few installations. I think with a little patience I could of fixed that problem. I think the ideal situation here is to put a tapered seat into the plug then tap for a turbo plug. I think this would at least put the compression ratio back into play. I also removed the last fin to try and make the head screw into the cylinder more but this didn't help either. Ken
Logged

Offline Pinecone

  • AMA Member and supporter
  • Trade Count: (0)
  • Commander
  • *
  • Posts: 235
Re: Burnt out Cox glow plug wanted (.049)
« Reply #4 on: February 14, 2009, 01:41:33 AM »
As per the other sites.  This is the worst option.

Galbreath is #1.  Valentine head for Turbo plug is #2.

And also very good (although reports are the Galbreath works better) is a Cox glow head.
Logged
Terry Carraway
AMA 47402

Offline goozgog

  • Trade Count: (0)
  • Captain
  • *****
  • Posts: 551
Re: Burnt out Cox glow plug wanted (.049)
« Reply #5 on: February 15, 2009, 04:43:31 AM »
Hello Chancey,
                    I tried this too. I was going to post
a picture but it's self explanatory. I just drilled and
tapped a hole in the Cox glow head and installed a
short reach plug. The results were underwhelming!
  The engine ran weakly, but it did run. I was
carefull that the plug reached as far as possible into
the combustion chamber. I think that a standard
plug has too much empty volume cut inside it and
this reduces the compression ratio.
It was a fun experiment.

Cheers!
Logged
Keith Morgan

Offline Chancey Chorney

  • Trade Count: (0)
  • Captain
  • *****
  • Posts: 621
Re: Burnt out Cox glow plug wanted (.049)
« Reply #6 on: March 23, 2009, 08:08:24 PM »
Well, project done.  Got it built and short reach plug in right now, but will also try long plug too so I may see if there is any difference.  Thanks to all for their help with a couple plugs for this experiment, as well as support to do this.  Will post pics in a couple days.  All I had available was a standard 1/4 - 28 nf tap, so I used that.  Head was soft, and the regular plug screwed in without much effort.  I have a thick type of fuel and chemical resistant teflon tape that I will also be trying out.  Will not try out for a little bit yet as snow is still here, we are gettin a big storm moving in right now from the Dakotas, an we are in flood warning too.  Sandbagging has already begun around here.  But will do a post run report when it happens. 

Chancey
Logged

Advertise Here
Pages: [1]   Go Up
« previous next »
Tags:
 


Advertise Here