Glow plug failures

[Dean Pappas]

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

_________________________________________________________________
Is your computer infected with a virus?  Find out with a FREE computer virus 
scan from McAfee.  Take the FreeScan now! 
http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963

=====================================
# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#

==================# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#