Glow plug failures

[Rcmaster199 at aol.com]

In a message dated 11/12/2003 1:29:29 PM Eastern Standard Time, 
anthonyr105 at hotmail.com writes:


> Subj:Glow plug failures 
> Date:11/12/2003 1:29:29 PM Eastern Standard Time
> From:<A HREF="mailto:anthonyr105 at hotmail.com">anthonyr105 at hotmail.com</A>
> Reply-to:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> Sent from the Internet 
> 
> 
> 
> 
> 
> 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
> 

Anthony,

The prop may be a little on the lite side for the engine, but others use so 
that's probably not the main issue. I would use a different fuel and experiment 
a bit. Try Kool Power or Powermaster that other fellows are using with great 
success. 

My favorite is a 50:50 mix of 30% CP heli blend and 5% standard CP, and a 
17x12 std APC

MattK
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