Bill,

 

 I cant speak for anyone else, but my engine goes lean when it stages. I know what location in the MCT the transition occurs by looking at the MCT using the EFISM in real time. I simply set the first location where it runs on 4 injectors way richer than the previous location. The next couple of locations gradually taper back down to a more normal mixture. At this point I trial and error adjust the rich location back down until the bog re-appears, then richen back up a little. Its really pretty straight forward with the EFISM - I assume Tracy's EM makes it equally easy.

 

Mike Wills

RV-4 N144MW

----- Original Message -----

From: Bill Bradburry

To: Rotary motors in aircraft

Sent: Tuesday, October 06, 2009 5:24 AM

Subject: [FlyRotary] Re: engine runup video

Mike,

Judging from the ease with which you tuned out the staging bog, you have a pretty good handle on how to tune the engine with the EC-2/3.

For the benefit of the ones of us who are still trying to understand that tricky little gem, could you give us some kind of blow by blow as to how you went about tuning the bog out?  I am wondering what you looked for to determine where the problem was and what you then did with trial and error? to tune it out.

Bill B 

 

---

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills
Sent: Sunday, October 04, 2009 12:35 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] engine runup video

For anyone who hasnt had that first engine run and is looking for some motivation. A buddy visited the hangar a few weeks ago and shot some video of an engine runup. He posted it to his website and you can find it here:

 

http://www.stinsonvoyager.com/images/MikeWills13bEngineRun.wmv

 

This was shot right after I re-installed my original muffler after the aborted DNA muffler test. Noticeable in the video is the big staging bog. I had this tuned out about 15 minutes after he shot the video.

 

Mike Wills

RV-4 N144MW