flyrotary@lancaironline.net Mailing List Archive

The three quickest ways to stop an engine (without throwing a monkey wrench into the gear box {:>)) that I can think of are: 1. Kill the ignition 2. Shut off the injectors 3. Shut off the fuel Turning off the power to the EC2 will not necessarily stop the engine - if you still have power to the injectors. Unless Tracy has designed it out in later versions, there is a "sneak" circuit in the EC2 that permits sufficient power from the injector power line for the EC2 to function and the engine to keep running even after turning "off" the EC2. Now if your power to both the EC2 and injectors are controlled by the same switch/Circuit breaker then no problem - but, if they are not - then beware. Killing the ignition is probably the quickest, but using the injector switches that Tracy has in his instructions turns out to be the quickest for me. Turning off the fuel pumps will stop it but not instantaneously - there is still sufficient pressure for additional squirts until the pressure/fuel is exhausted. Turning off the injector power removes the means for the injector to open and that stop the fuel flow - right then! Its a bit faster to turn off the injectors (in my case) than trying to find the right circuit breaker (ignition) on the panel and pulling it. The two injector switches are right below my throttle and I normally use them for starting and stopping. FWIW Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ----- Original Message ----- From: "Bob White" <rlwhite@comcast.net> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> Sent: Sunday, January 08, 2006 10:08 AM Subject: [FlyRotary] Re: First Engine Start Hi Steve, Mine is wired the same way. That's the way Jim Bede designed it, and I suspect it must be the way at least some of the GA planes are wired. I'm thinking about changing it around as I can't charge both batteries at the same time without turning on the master switches. (Normal bus and critical bus that I added.) I'll have to think about the consequences a little more though. I'm pretty sure I got it stopped by killing the fuel pump also, but I was madly turning off every switch I could get my hands on. Probably the quickest would have been to pop the circuit breaker on the EC2 but that would have required too much thinking time. Bob W. On Sun, 8 Jan 2006 08:54:38 -0500 "Steve Brooks" <prvt_pilot@yahoo.com> wrote: Bob, Congrats on the first start. I had a similar experience on my first start, but not at full throttle. I didn't have a prop, and had set the throttle stop to have a small amount of opening on the butterfly. I didn't realize how little air it takes to run a pretty high RPM. It fired up at a pretty high RPM, and when I killed the master, it kept running, because of the way I had wired the alternator, it was sustaining the electrical power to the engine. I finally shut off the fuel to get it stopped. Reading your report brought back some not so fond memories. Luckily these engines will take some abuse and not cause damage. Steve Brooks Cozy MKIV N75CZ Turbo Rotary -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Bob White Sent: Saturday, January 07, 2006 8:44 PM To: Rotary motors in aircraft Subject: [FlyRotary] First Engine Start I'm happy to report that I actually started my engine today. The only terrifying event was due to a momentary brain fade on my part. For some reason I was thinking the throttle had to be all the way in to be off. Not sure why I got that into my head. Maybe because I've kept it in that position just so it was out of the way while I worked on the electrical for the last month. Any way, I cranked it over, it sort of fired a little but did't start. I hit the cold start switch and BAM, it took off at WOT. Sorry to say I don't know what the RPM reading was as I was flipping every switch I could get my hands on to get it stopped. Glad I had primed the oil pump with the starter the other day. So the first 10 seconds or so of my first start was at WOT. Also glad I had a prop on it. I got that all sorted out and restarted the engine. I ran it for 10-20 minutes and noted some random parameters. Today's goal was to start the engine, not take data. I ran till the oil temp read 156 and water 182 before I shut it down. Oil pressure at first start indicated 97 psi. I didn't check at shutdown. The gear box seemed to rattle around 1000 rpm, but it idles pretty good above 1200 or so. (I need to start reading some of the EC2 and EM2 instructions.) I made no attempt to set mixture or anything, and all of the sensors are using the default settings. The actual values may change as I get calibration data. I do have Tracy's latest self adjusting mixture feature, and it did seem like the engine smoothed out as it ran. tried to take some video of the first start, but for some reason it didn't work. The tape moved but nothing was recorded. Later I recorded running the engine again. As soon as I relearn how to get it onto the computer, I will post a short clip on my web site. *Jerry Hey's Cool Tube Exhaust system. The best I can tell, this exhaust is doing a great job. I took one quick reading from the wing tip on the exhaust side of the plane. I saw 97 db on mode C and about 3000 rpm (Radio Shack sound meter). I will get more complete data in days to come. There were a half dozen people standing around watching all this, and no one mentioned anything about the exhaust noise. All I can say is I'm thrilled to reach this milestone. Bob W. -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (The engine is running) Custom Cables for your rotary installation - http://www.roblinphoto.com/shop/ -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (first engine start 1/7/06) Custom Cables for your rotary installation - http://www.roblinphoto.com/shop/ -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/