Thinking about it a little more I do see one problem with a lawnmower type of iginition. Lawnmowers and weed whackers have the ignition set pretty much near top dead center. It makes them a lot easier to start and is also one of the reasons why you have a fairly good sized engine to make the little power that they do. The only way to get the power you should and also make it start easy is with something like an impulse coupling. I imagine that the Aerovee has some kind of way to advance the timing built in, but once you have gone through all the trouble of making something that works and is reliable you might as well just have gone with a regular aircraft magneto.
I guess that something like an electronic ignition with spark advance for normal use and for starting with a quick and dirty lawnmower type set with fixed timing for a backup is food for thought. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Mark Langford Sent: Wednesday, November 22, 2006 11:10 AM To: KRnet Subject: KR> "lawnmower" ignition Kevin Golden wrote: > I have an idea that does not > require a voltage source, but is "out there" so most will think I have > "lost it". LAWN MOWER IGNITION. Simple, cheap, reliable, easy to set > up, easy to have dual ignition, and NO VOLTAGE NEEDED. Isn't your "lawnmower ignition" pretty much what Monnett is using on his AeroVee? See the photo at http://home.hiwaay.net/~langford/osh2000/000727152.jpg that I took at Oshkosh in 2000. It does have a lot of appeal, but I'll bet the spark isn't exactly brilliant. I think the system I came up with covers the bases pretty well, and has enough reduncancy built in to handle just about any failure (famous last words). See http://home.hiwaay.net/~langford/electrical/index.html for more details on that... Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
