Two plugs - Neccessary?

[Wayne Galligan]

And I thought platinum plugs for these Acura's we work on where expensive.
Acura TL  6 plugs installed  $228.00 

Wayne Galligan
  ----- Original Message ----- 
  From: gene.maurice at comcast.net 
  To: discussion at nsrca.org ; discussion at nsrca.org 
  Cc: Bob Richards 
  Sent: Thursday, April 21, 2005 10:08 AM
  Subject: Re: Two plugs - Neccessary?


  Last time my son flew his Mooney M20J Turbo here he had to have the plugs (8)replaced (power way down @ 18,000ASL, two plugs dropping out). Cost installed $580

  --
  Gene Maurice 
  AMA 3408 NSRCA 877 
  Plano, TX 
  gene.maurice at comcast.net

    -------------- Original message -------------- 

    > John, 
    > 
    > If I'm flying in a full-scale, I like having the 
    > redundancy of two completely separate iginition 
    > systems. :-) 
    > 
    > I'm not sure what you mean about two plugs making the 
    > troubleshooting more difficult. Should be easy to 
    > isolate. 
    > 
    > OTOH, changing plugs on my Dad's 182 was an expensive 
    > proposition. Back in the 80's, each plug was $12, and 
    > there were 12 plugs. :-( I have no idea what they 
    > cost now. I guess if you can afford the fuel now, you 
    > can certainly afford the plugs. The 182 holds 80 
    > gallons! 
    > 
    > Bob R. 
    > 
    > --- John Ferrell wrote: 
    > > Thanks for confirming my suspicions! 
    > > The only dual ignition engines that I am aware of 
    > > are those in highly critical applications, full 
    > > scale airplanes and emergency services. My personal 
    > > experience with full scale has been that the second 
    > > spark plug only makes the troubleshooting more 
    > > difficult. I believe the whole idea of redundant 
    > > ignition is a concept whose time has past. There are 
    > > twice as many things to fail. 
    > > 
    > > I knew a fellow who was preparing a van for his 
    > > handicapped son. The law at the time required dual, 
    > > isolated batteries. The mechanics acknowledged that 
    > > the isolation electronics were the least reliable 
    > > part of the van. That was many years back, I hope it 
    > > is better now. 
    > > 
    > > John Ferrell 
    > > http://DixieNC.US 
    > > 
    > 
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