Glow plug failures

[Anthony Romano]

Hi Dean! Good to hear from you.
I did hear a few little pingies on the flight before the last glow plug 
departed. Was going to add another gasket but I was out of stock. Found the 
two cycle needle setting are much more sensitive to the big weather changes 
on these fall days. Will be more diligent on the needle settings going 
forward. Was thinking of trying the next colder OS plug. Can't remember 
which that is.

Anthony


>From: "Dean Pappas" <d.pappas at kodeos.com>
>Reply-To: discussion at nsrca.org
>To: <discussion at nsrca.org>
>Subject: RE: Glow plug failures
>Date: Wed, 12 Nov 2003 14:52:23 -0500
>
>Hi Anthony,
>You might still be pinging. I had 2 extra gaskets in my older 140 RX, and 
>it would still ping if I didn't set it rich enough. That's with S&W 15%! 
>Launch fatter, if the midrange will allow it and see what happens. The 
>factory still recommends lower percentages of nitro. Above 80 degrees F, I 
>would drop down to a K&B 1-L. That made things better and the plugs last 
>longer. Oh yeah, a percent or two of castor shouldn't hurt at all. Keep 
>using it.
>Take care ...
>	Dean
>
>-----Original Message-----
>From: Anthony Romano [mailto:anthonyr105 at hotmail.com]
>Sent: Wednesday, November 12, 2003 1:29 PM
>To: discussion at nsrca.org
>Subject: Glow plug failures
>
>
>
>
>Have an Os 1.40 that has a pretty healthy appetite for glow plugs. First,
>was blowing the seal so I added a head shim and pulled out the pipe a
>little. Now the just seem to loose conductivity. Engine runs fine but go to
>restart for next flight and nobody home. Typically lifespan is about 30
>flights.
>Using Type F, S&W 20% nitro 16%syn 2%castor fuel, Es pipe at 23" with Mac 2
>1/"4 header, Apc 16.5 *12W resulting in a peak setting around 8100 and a
>launch setting of 8000. Have another head shim on order and will try a
>little longer pipe if the weather ever improves. Any other suggestions?
>
>TIA
>
>Anthony
>
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