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From: <jewen@comporium.net>
Subject: Re: [FlyRotary] Re: First Start
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Date: Wed,  8 Jul 2009 18:18:29 -0400 (EDT)

Pushed it out last night to run it a git more.  Seems like I have a good pattern for starting.  3 shots prime, injector off, crank and when the primed fuel starts to fire turn on primary injector.  Started up right away the first time.  Spent some time trying to get the RPM display right.  Looks like a previous formula I had was wrong, but I think I figured out exactly what the speed signal from the EC2 really is, so I have rewritten the formula and am ready to try it.  I have the datalog for all engine parameters set up but forgot to turn the logger on before running.  While we need the rain, am hoping it will stop so I can run again tonight.  While waiting on the rain will be trying to set up the monitoring of the o2 sensor so I can tune with its guidance.  I did a little tuning last night by ear finding that slightly rich of default seems to run best in the 1500 to 2000 range.

One concern I have is a big difference in EGT 1, 2, 3.  1 is running about 200F hotter than the others.  To see if I have a sensor issue I swapped EGT 1 and 2.  While swapping i found the #2 sensor to be rather sooty (rich mixture) but the #1 looked more ash colored (normal mixture.)  If the sensor readings are correct, looks like I may need to adjust the injector differential for rotors 2 and 3, but Tracys instructions cautions not doing so at lower RPM.  Not sure what direction to go on the injector differential - if 2 rotors are rich and 1 is normal/lean, my O2 may give a stiometric reading while each rotor may not be running stiometric since the O2 sensor is reading a composite of all 3 rotors.  Looks like I may need more data to figure this part out.

But, it was nice to have it fire right up on the first crank.
Thanks for asking,
Joe


---- Original message ----
>Date: Wed, 8 Jul 2009 09:54:27 -0400
>From: "Ed Anderson" <eanderson@carolina.rr.com>  
>Subject: [FlyRotary] Re: First Start  
>To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>
>Hi Joe,
>
>Anything significant to report on how things are going with the 20B?
>
>Ed Anderson
>
>Rv-6A N494BW Rotary Powered
>
>Matthews, NC
>
>eanderson@carolina.rr.com
>
>http://www.andersonee.com
>
>http://www.dmack.net/mazda/index.html
>
>http://www.flyrotary.com/
>
>http://members.cox.net/rogersda/rotary/configs.htm#N494BW
>
>http://www.rotaryaviation.com/Rotorhead%20Truth.htm
>
>-----Original Message-----
>From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
>Behalf Of jewen@comporium.net
>Sent: Wednesday, July 08, 2009 9:36 AM
>To: Rotary motors in aircraft
>Subject: [FlyRotary] Re: First Start
>
>Hi Ernest,
>
>Sorry for the delayed reply, have not been keeping up with my email.  I am
>located in Lancaster SC, about a 30 minute drive from Charlotte or a 10
>minute drive from KLKR.
>
>Joe
>
>
>---- Original message ----
>>Date: Sat, 04 Jul 2009 14:20:30 -0400
>>From: Ernest Christley <echristley@nc.rr.com>  
>>Subject: [FlyRotary] Re: First Start  
>>To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>>
>>jewen@comporium.net wrote:
>>> Today I reached a mile stone on my Velocity / 20B project.  The many
>hours of research, planning, building, etc paid off today as the 20B came to
>life this afternoon.
>>>
>>> About 9:30 this morning, Ed Anderson came by and looked over my
>installation.  After finding no 
>>Where are you at, Joe?  I'm in Cary, NC and I'd like to see another 
>>rotary running.
>>
>>-- 
>>
>>http://www.ernest.isa-geek.org
>>
>>
>>
>>--
>>Homepage:  http://www.flyrotary.com/
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