flyrotary@lancaironline.net Mailing List Archive

Ed, Can you tell by looking at a plug if it's probably a SAG plug? Is there any way of testing the plugs without flying them? If there were some way to tell if that was the problem I experienced I would like to find out. I've squirted oil in the chambers to protect the engine while it's sitting around so that might complicate inspection. I bought a CD system for my 1952 Ford back in the early '60's. Unfortunately the '52 Ford was positive ground and the CD system was not so it didn't work at all. I then tried to build one from plans in a book using the stock coil. I never got it to work very well and gave up on the project. Bob W. On Mon, 11 Jun 2007 11:39:29 -0400 "Ed Anderson" <eanderson@carolina.rr.com> wrote: Ok, Bob, I thought perhaps different MSD systems for different automobiles, seems I used to recall they had a series for regular automobiles that didn't use Capacitor Discharge, but my memory being what it isn't. Thanks Ed ----- Original Message ----- From: "Bob White" <rlwhite@comcast.net> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> Sent: Monday, June 11, 2007 10:27 AM Subject: [FlyRotary] Re: MSD type Ignition CD or not? was Re: Spark Plug Cleaning > Hi Ed, > > All of the regular MSD systems are CD's. I sort of wonder if the > Blaster coils are or not, and if they are do they have the same energy > levels of the other MSD systems. I think I've seen that the multiple > spark feature goes away at higher RPM's because of time constraints. > > Bob W. > > > On Mon, 11 Jun 2007 10:01:01 -0400 > "Ed Anderson" <eanderson@carolina.rr.com> wrote: > >> Given the interest in getting rid of SAG - its important that we are all >> on the same wavelength when discussing components. For example, there >> are a whole bunch of different MSD ignition systems out there - I'm not >> certain that they are all Capacitive Discharge types. It may made a >> difference regarding their ability to avoid/delay on set of SAG. >> >> At least Lynn's assessment about the rise time of the CD type driven >> coils being so fast as not to permit much voltage leakage via the lead >> deposits and thereby avoiding SAG seemed to make sense to me. >> >> So the question to Bob Mears is do you recall whether the MSD system >> being used was a Capacitive Discharge type? Thanks! >> >> Ed >> ----- Original Message ----- >> From: bmears9413@aol.com >> To: Rotary motors in aircraft >> Sent: Monday, June 11, 2007 8:56 AM >> Subject: [FlyRotary] Re: Spark Plug Cleaning >> >> >> SAG can appear any where apparently. We ran a MSD system on our race >> care and still ran into the problem. The problem ended when we switched >> to alcohol, but thats not a fix for airplanes! >> >> Bob Mears >> Supermarine spitfire >> >> >> >> > > > -- > N93BD - Rotary Powered BD-4 - http://www.bob-white.com > 3.8 Hours Total Time and holding > Cables for your rotary installation - http://www.roblinphoto.com/shop/ > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 3.8 Hours Total Time and holding Cables for your rotary installation - http://www.roblinphoto.com/shop/