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<DIV>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</DIV>
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<DIV class=signature id=signature>--<BR>Gene Maurice <BR>AMA 3408 NSRCA 877 <BR>Plano, TX <BR>gene.maurice@comcast.net</DIV>
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<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR><BR>> John, <BR>> <BR>> If I'm flying in a full-scale, I like having the <BR>> redundancy of two completely separate iginition <BR>> systems. :-) <BR>> <BR>> I'm not sure what you mean about two plugs making the <BR>> troubleshooting more difficult. Should be easy to <BR>> isolate. <BR>> <BR>> OTOH, changing plugs on my Dad's 182 was an expensive <BR>> proposition. Back in the 80's, each plug was $12, and <BR>> there were 12 plugs. :-( I have no idea what they <BR>> cost now. I guess if you can afford the fuel now, you <BR>> can certainly afford the plugs. The 182 holds 80 <BR>> gallons! <BR>> <BR>> Bob R. <BR>> <BR>> --- John Ferrell <JOHNFERRELL@EARTHLINK.NET>wrote: <BR>> > Thanks for confirming my suspicions! <BR>> > The only dual ignition engines that I am aware of <BR>> > are those in highly critical applications, full <BR>> > scale airplanes and emergency services. My personal <BR>> > experience with full scale has been that the second <BR>> > spark plug only makes the troubleshooting more <BR>> > difficult. I believe the whole idea of redundant <BR>> > ignition is a concept whose time has past. There are <BR>> > twice as many things to fail. <BR>> > <BR>> > I knew a fellow who was preparing a van for his <BR>> > handicapped son. The law at the time required dual, <BR>> > isolated batteries. The mechanics acknowledged that <BR>> > the isolation electronics were the least reliable <BR>> > part of the van. That was many years back, I hope it <BR>> > is better now. <BR>> > <BR>> > John Ferrell <BR>> > http://DixieNC.US <BR>> > <BR>> <BR>> ================================================= <BR>> To access the email archives for this list, go to <BR>> http://lists.f3a.us/pipermail/nsrca-
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