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ignition

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wild.blue(at)verizon.net
Guest

Posted: Thu Mar 23, 2006 12:01 pm Post subject: ignition

Ladies, Gents and Dennis--



Recently acquired a Yak-55M with automotive ignition installed.  As

advertised, it starts and runs great.  Sparks is sparks.  Not impressed by

the way the wires enter the mag, wrapped in friction tape etc., but maybe

that can be remedied.  Dennis, your website doesn't get very specific about

how the wires are supposed to be sealed at the mag.  Suggestions?  Pictures?

 I do wonder about exposed plug porcelain out in the breeze, rain, snow etc.

 Anyone ever have any cracked porcelains?  Other problems?  Wire/plug life? 

Not usually big on shadetree engineering (no offense)--I've seen too many 

simple" mods and minor maintenance faux pas lead to unexpected and sometimes

serious problems--but trying to be open-minded...Yes, I know all about A-40

s etc.



Fate is still out there hunting, donchaknow.  Checksix, cloaking device

activated.



Jerry Painter



Designated Stick-in-the-Mud



Wild Blue Aviation

jsfox(at)adelphia.net
Guest

Posted: Thu Mar 23, 2006 12:22 pm Post subject: ignition

Jerry,



Not sure I'd keep the friction tape just ugly and useless. I'd remove  

and put a zip tie around the wires just forward of where they enter  

the mag. As far as sealing the mag, I agree with Dennis on this, no  

need. The Russian wire weren't sealed at this point either. The hose  

the old wires went through was a porous as a sieve. In fact a friend  

who has a 52 with Russian wires had his engine hosed down, ugh. The  

water collected in the ignition wires causing some rather significant  

mag drops. It took him forever to disconnect all the wires drain and  

dry. This wouldn't have been an issue with the auto ignition harness.  

Also if you look closely at where the wires enter the mag they go in  

very tightly not leaving a lot of space for moisture to migrate. And  

should a bit get through and I think you'd have to be flying in a  

driving rain with gills wide open engine heat would evaporate long  

before it became an issue.



Just my thoughts,



Steve Fox



On Mar 23, 2006, at 3:00 PM, Jerry Painter wrote:



 	  Quote: 	
		   

 <wild.blue(at)verizon.net>



 Ladies, Gents and Dennis--



 Recently acquired a Yak-55M with automotive ignition installed.  As

 advertised, it starts and runs great.  Sparks is sparks.  Not  

 impressed by

 the way the wires enter the mag, wrapped in friction tape etc., but  

 maybe

 that can be remedied.  Dennis, your website doesn't get very  

 specific about

 how the wires are supposed to be sealed at the mag.  Suggestions?   

 Pictures?

  I do wonder about exposed plug porcelain out in the breeze, rain,  

 snow etc.

  Anyone ever have any cracked porcelains?  Other problems?  Wire/ 

 plug life?

 Not usually big on shadetree engineering (no offense)--I've seen  

 too many

 simple" mods and minor maintenance faux pas lead to unexpected and  

 sometimes

 serious problems--but trying to be open-minded...Yes, I know all  

 about A-40

 s etc.



 Fate is still out there hunting, donchaknow.  Checksix, cloaking  

 device

 activated.



 Jerry Painter



 Designated Stick-in-the-Mud



 Wild Blue Aviation

gus.fraser(at)gs.com
Guest

Posted: Thu Mar 23, 2006 12:39 pm Post subject: ignition

I agree that it is not needed but I did use some Silone sealer where I could

see gaps.



Gus 



--

cpayne(at)joimail.com
Guest

Posted: Thu Mar 23, 2006 2:28 pm Post subject: ignition

SOB wrote:

 >

 >As far as sealing the mag, I agree with Dennis on this, no  need. 

 >

 >

 Unhh, I beg to differ here, moisture anywhere near the distributor cap sparkies is not good. Like Gus, I used silicone seal plus self-bonding tape around the wires. Problems inside the distributor cap and rotor are often mis-attributed to mag timing, mag coil breakdown or high voltage leaks in the harness. What happens is that excess carbon builds up "downwind"  of each individual spark contact and timing advance is skewed. A little moisture and there are new paths for high voltage to find it's way to ground.

 Take care of the HV side of your system: points, "cigarette", rotor, distributor cap, leads and spark plugs. Your reward will be smooth runnings, dude.

 Craig Payne

jsfox(at)adelphia.net
Guest

Posted: Thu Mar 23, 2006 2:42 pm Post subject: ignition

On Mar 23, 2006, at 5:27 PM, Craig Payne wrote:

 	  Quote: 	
		  Unhh, I beg to differ here, moisture anywhere near the distributor cap sparkies is not good. Like Gus, I used silicone seal plus self-bonding tape around the wires. Problems inside the distributor cap and rotor are often mis-attributed to mag timing, mag coil breakdown or high voltage leaks in the harness. What happens is that excess carbon builds up "downwind"  of each individual spark contact and timing advance is skewed. A little moisture and there are new paths for high voltage to find it's way to ground.

 

Take care of the HV side of your system: points, "cigarette", rotor, distributor cap, leads and spark plugs. Your reward will be smooth runnings, dude.

 

Craig Payne

 

	


No need to beg. You have every right to differ 



Steve

dsavarese(at)elmore.rr.co
Guest

Posted: Thu Mar 23, 2006 3:08 pm Post subject: ignition

I agree with Gus' recommendation and with Stephen analysis.

Dennis



---

BitterlichMG(at)cherrypoi
Guest

Posted: Thu Mar 23, 2006 3:36 pm Post subject: ignition

 	  Quote: 	
		     SOB wrote:

   As far as sealing the mag, I agree with Dennis on this, no  need.    

    

   Craig Payne replied:.   

   Unhh, I beg to differ here, moisture anywhere near the distributor cap    sparkies is not good. Like Gus, I used silicone seal plus self-bonding tape    around the wires. Problems inside the distributor cap and rotor are    often mis-attributed to mag timing, mag coil breakdown or high voltage leaks    in the harness. What happens is that excess carbon builds up "downwind"     of each individual spark contact and timing advance is skewed. A little    moisture and there are new paths for high voltage to find it's way to    ground.

    

   Take care of the HV side of your system: points, "cigarette", rotor,    distributor cap, leads and spark plugs. Your reward will be smooth runnings,    dude. 

    

    

    

    

   Mark Bitterlich now adds:  Although I    agree with you in theory Craig, of note is the fact that I have three aircraft    with M-14's here at New Bern, NC with this mod and none of them have used any    sealer on the wire output hole of the mag itself and have experienced    absolutely no problems what-so-ever.  

    

   On the same note of "begging to differ",    here are some other considerations:

     

   1.  Certain types of silicone sealer    give off a corrosive gas when drying, which spells BAD NEWS for any electrical    circuit, not to mention high voltage ones.  

   2.  When you have a totally sealed    high voltage environment, the sparking within the divide ionizes the gases    inside as well.  This ionization can sometimes promote unplanned for    high voltage arcing.  It is a good idea to vent high voltage enclosures,    unless you either pump out all the air, or replace it with something like    water pumped nitrogen.  

    

   Certainly, water    penetration into the mag would be a disaster... but even with that plug wire    outlet on the mag left alone, water intrusion into that area is highly    unlikely given it's location and past performance,  not to    mention how the wires go into the top of the cap while the rotor and    all other high voltage areas are underneath.  

    

   To each his own, but    there are certainly arguments for either.   

    

   Mark    Bitterlich

dstroud(at)storm.ca
Guest

Posted: Thu Mar 23, 2006 4:16 pm Post subject: ignition

Giday, Craig. I haven't had time to dig into  my mags yet...just got my Housai today from VAM

 and I'm curious what the cigarette is. I'll  definitely go auto on the ignition stuff. Thanks..

  

 David Stroud   Ottawa, Canada

C-FDWS  Christavia  

Fairchild 51 early construction 

 [quote]   ---

dsavarese(at)elmore.rr.co
Guest

Posted: Fri Mar 24, 2006 4:33 am Post subject: ignition

Many people refer to the high voltage lead that fits into  the hole at the rear of the magneto cap (where all the spark plug wires go into)  as the "cigarette".  It is about the size of a pencil.

 Dennis

  

 [quote]   ---

cgalley(at)qcbc.org
Guest

Posted: Fri Mar 24, 2006 5:17 am Post subject: ignition

Sorry, It is a WW2 term for the Sparkplug end that  fits down inside the plug.  They were made of white porcelain so they  looked like a cigarette butt.

  

 Cy Galley - Chair, 

Air Emergency Aircraft  Repair

A Service Project of Chapter 75

EAA Safety Programs Editor -  TC

EAA Sport Pilot

 [quote]   ---

dsavarese(at)elmore.rr.co
Guest

Posted: Fri Mar 24, 2006 5:47 am Post subject: ignition

That is also quite true Cy.  But some folks use the  term "cigarette" interchangeably with the lead that goes into the spark plug  with the high voltage lead that inserts into the magneto cap.

 Dennis

  

 [quote]   ---

gus.fraser(at)gs.com
Guest

Posted: Fri Mar 24, 2006 6:01 am Post subject: ignition

And the Russians call spark plugs candles !

  

 Gus



 [quote]         From: owner-yak-list-server(at)matronics.com    [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of    cgalley

Sent: Friday, March 24, 2006 8:17 AM

To:    yak-list(at)matronics.com

Subject: Re: Re:    ignition

   

   Sorry, It is a WW2 term for the Sparkplug end    that fits down inside the plug.  They were made of white porcelain so    they looked like a cigarette butt.

    

   Cy Galley - Chair, 

Air Emergency Aircraft    Repair

A Service Project of Chapter 75

EAA Safety Programs Editor -    TC

EAA Sport Pilot

   [quote]     ---

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