Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1) with ESMTP id 2510985 for flyrotary@lancaironline.net; Mon, 04 Aug 2003 09:56:37 -0400 Received: from o7y6b5 (clt78-221.carolina.rr.com [24.93.78.221]) by ms-smtp-01.southeast.rr.com (8.12.5/8.12.2) with SMTP id h74Do189007556 for ; Mon, 4 Aug 2003 09:50:04 -0400 (EDT) Message-ID: <001201c35a91$6b7fc800$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: tiny tach works, and my plane is a pig Date: Mon, 4 Aug 2003 10:05:09 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01C35A6F.E30DADA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_000F_01C35A6F.E30DADA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message =20 Hopefully, your rough engine is as simple as a fouled plug. Is it = rough at all speeds? Ok at idle rough at higher rpm?=20 It gets better as the speed increases, but it's not "spooky smooth" = like I described it before. Until I do some tuning, there is no idle. = It won't run below about 2000 rpm, but this is something that Tracy is = sure is a tuning problem. I would like to start working on tuning the = engine this weekend, and I've been whining as hard as I can to get Tracy = to send me the new firmware. He now offers an option of using his = actual engine parameters as a default, instead of the normal factory = default (which is still an option). That would put me in the ballpark = quickly. Waaaaa can I have my firmware now Tracy :-)=20 =20 As I recall, Tracy's default MAP settings for the EC2 is a bit rich = for the lower rpms and comes out about on the money for the high rpms. = Do you have an Air/Fuel Mixture sensor monitor? Even though the simple = LED ones are not what I would call accurate, they are really very = helpful (I don't like to fly without one now) as they do provide a = relative indication of what is happening to your air/fuel mixture. I = can detect on the monitor that the mixture is going too lean (LED lights = headed toward the lean point) before the engine starts to stumble and by = quickly enriching the mixture - catch it. Tracy and I both agree, that = while you can tune your engine using just EGT, it is much harder and = more frustrating to do so compared to using even a simple LED A/F = indicator. Hopefully you will find that your initial weight is erroneous. 50lbs = for radiator and coolant is err.. impressive! Should have no problems = with cooling {:>) Ed ------=_NextPart_000_000F_01C35A6F.E30DADA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
 
Hopefully, your  rough = engine is as=20 simple as a fouled plug.  Is it rough at all speeds? Ok at idle = rough at=20 higher rpm? 
 
It gets better as the speed increases, but = it's=20 not "spooky smooth" like I described it before.  Until I do = some=20 tuning, there is no idle.  It won't run below about 2000 = rpm, but=20 this is something that Tracy is sure is a tuning problem.  I = would like=20 to start working on tuning the engine this weekend, and I've been = whining=20 as hard as I can to get Tracy to send me the new firmware.  He = now offers=20 an option of using his actual engine parameters as a default, = instead of=20 the normal factory default (which is still an option).  That = would=20 put me in the ballpark quickly.
 
Waaaaa can I have my firmware now Tracy=20 :-) 
 
As I recall, Tracy's default MAP = settings for the=20 EC2 is a bit rich for the lower rpms and comes out about on the money = for the=20 high rpms.  Do you have an Air/Fuel Mixture sensor monitor?  = Even=20 though the simple LED ones are not what I would call accurate, they = are really=20 very helpful (I don't like to fly without one now) as they do provide = a=20 relative indication of what is happening to your air/fuel = mixture.  I can=20 detect on the monitor that the mixture is going too lean (LED lights = headed=20 toward the lean point) before the engine starts to stumble and by = quickly=20 enriching the mixture - catch it.  Tracy and I both agree, that = while you=20 can tune your engine using just EGT, it is much harder and more = frustrating to=20 do so compared to using even a simple LED A/F indicator.
 
Hopefully you will find that your = initial weight=20 is erroneous.  50lbs for radiator and coolant is err.. = impressive! =20 Should have no problems with cooling {:>)
 
Ed
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