flyrotary@lancaironline.net Mailing List Archive

Hi Tracy, Can or should these be used in the 13B? I found two part numbers for the NGK IR plugs: RE7CL and RE9BT. These are apparently the leading and trailing numbers. Interestingly, I found a web site selling them for $96 each (list $192). On the NGK web site, they are $19.95! Bob W. On Tue, 13 Dec 2005 20:51:44 -0500 "Tracy Crook" <lors01@msn.com> wrote: > SUPER idea Buly. I wish I had collected all the incidents of this sort for a troubleshooting hint list but the time to do it has escaped me. Haven't even had the time to check Bob's Wiki site (another GREAT idea) to see what might be there already. If anyone has or builds such a list like you suggest, I would be happy to include it in the EC2 installation guide and publish on my website. > > Coil Woes > > Not that the cause is a great mystery (I think it is my high under cowl temps) but I just replaced the second coil to fail on my engine. Thanks to the dual ignition nature of the rotary, the only thing it caused was an imbalance in the EGTs. But this time it was an intermittent failure which made it very difficult to nail down. > > To make it easier to find (and as an installation trouble shooting tool) , I added two diagnostic modes to the EC2. All future EC2s (and updated ones) will have this feature. One of them fires the coils as if the engine were running at 3000 rpm. The other does the same thing with the injectors. To find the bad coil I plugged the coils into 4 old plugs sitting on top of the engine and started the coil diagnostic mode and waited until I saw the spark on one plug stop momentarily. Gottcha! > > IR plugs > > Speaking of sparkplugs, I installed the stock RX-8 NGK iridium plugs in my engine about 50 flight hours ago. During the course of troubleshooting the ignition problem, I looked at the plugs for the first time and was very impressed. After 50 hours the NGK RX-7 plugs (BUR-7/9 EQ) I previously used would be working fine (on auto fuel) but would be noticeably eroded, especially on the center electrode. After 250 hours they would be so far gone that I wonder how they worked at all. At 50 hours the iridium plugs showed absolutely no wear whatsoever on their very thin center and ground electrodes. I examined them under a microscope to be sure my aging eyeballs were not fooling me. This will be my plug of choice in the future. As far as heat range, it looked like they were on the cold side which was surprising. > > Tracy > ----- Original Message ----- > From: Buly<mailto:atlasyts@bellsouth.net> > To: Rotary motors in aircraft<mailto:flyrotary@lancaironline.net> > Sent: Tuesday, December 13, 2005 10:50 AM > Subject: [FlyRotary] Troubleshooting database > > > > I was going to suggest this to Tracy, to ease his load on the phone > calls. But I know how busy he is, so maybe we can create the > database. Everybody here once in a while comes against problem that > takes (sometimes) weeks to solve. If all that is reported with > simptoms and solutions found, maybe next time we can look it up there > before calling Tracy? > Latest example: > After getting my updated EC from Tracy I had hell of a time for > couple of months. Engine was hard to start, very rich, fouling plugs. > I returned it to Tracy and he found nothing wrong. One day after > starting it by using starting fluid, I noticed my MP reading stuck on > 29.8. Ahaaa! Started looking and found a MP hose fitting > disconnected. The EC was reading full throttle and was dumping fuel > accordingly, plus the fuel press. regulator was increasing the FP. > If we had a Q&A type list maybe I would have found it much sooner? > What do you think? > Buly > > > > > -- > Homepage: http://www.flyrotary.com/<http://www.flyrotary.com/> > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/<http://mail.lancaironline.net/lists/flyrotary/> > -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (Projected engine start - maybe next week) Custom Cables for your rotary installation - http://www.roblinphoto.com/shop/