X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from an-out-0708.google.com ([209.85.132.241] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2430080 for flyrotary@lancaironline.net; Wed, 24 Oct 2007 00:25:22 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.132.241; envelope-from=rwstracy@gmail.com Received: by an-out-0708.google.com with SMTP id c34so20774anc for ; Tue, 23 Oct 2007 21:24:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:references:x-google-sender-auth; bh=IBzYdzQuE5RC9QktYps85pG1wlTJYBumxSXpL53by68=; b=l8VqgjoY4epgxUWusCxoIAgJgngJI2OOWjqq8PWA+k0Lse6GtiSxR8dXyRGiWgjb6j6dCgH6SAeO80GL7VeA4WOf5Z17CuuXC3jvjXT3CaK460fhDalvDYAaOKpOC52sPdE/igvLHy456SsW3/LCKFo5p6AQ2bpR1y9+/RY0IN4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:references:x-google-sender-auth; b=r9l1wFqYEE3Z3rDnn9rXYuNM5D4A7pRGeuMummX/CZQAXMwR5N18p/o0H7akcMemjzC+7XpZDvNv2jz5QO888De7GrjUSmc3MJRRNHEzbGH5avHSJ0+6p+LVCU53oQos+8EPc6HPh2Tcn2+/V4A6HtniEoU6Xd40rjMQBCagWCo= Received: by 10.142.165.9 with SMTP id n9mr12737wfe.1193199882238; Tue, 23 Oct 2007 21:24:42 -0700 (PDT) Received: by 10.143.14.7 with HTTP; Tue, 23 Oct 2007 21:24:42 -0700 (PDT) Message-ID: <1b4b137c0710232124o306e4b1vc871356b55012c3f@mail.gmail.com> Date: Wed, 24 Oct 2007 00:24:42 -0400 From: "Tracy Crook" Sender: rwstracy@gmail.com To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Fuel delivery at WOT In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_5065_609682.1193199882248" References: X-Google-Sender-Auth: 4f206b56b76c6413 ------=_Part_5065_609682.1193199882248 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Bill, Prior to running autotune you should manually tune to get mixture in the ball park. To give any more meaningful feedback I would need to know if you have done any adjustment to Mode 3 and/or Mode 1? Could you get the same result (as cold start switch) by turning up the manual mixture control? What was your mixture monitor telling you during all these tests? Are you out of range o= n the MAP correction table (already at max?) Did you set Mode 3 at 22 - 24" MAP prior to making other adjustments as suggested in the instructions? But Ed's advice was good. The fact that you could get enough fuel flow by doing anything at the EC2 tells you that the fuel system is capable of delivering enough fuel (this assumes the fuel pressure was OK which your data indicates is the case). The snubber and diagnostic modes are not related. The diagnostics went in some time before the snubber change. Don't know which version you have. Tracy Crook On 10/23/07, Bill Bradburry wrote: > > I have been concerned that I am not getting the static rpm that others > are getting with similar props. I have the stock Renesis with the > Performance Props 76 X 88. I seem to be limited to about 4200 rpm. I hi= t > 4800 once the other day, but did not know what might have caused the > change. I just finished the install of the pressure overflow bottle per > Lynn's msg of a while back and was running the engine up to try and > eliminate any air that might still be in the engine. I noticed that when > the rpm reached 4200 or so, I still had about an inch of throttle left. > After pondering that for a couple of minutes, I pushed the throttle to th= e > wall, the engine started to run rough, and I reached over and flipped the > cold start switch on=85. > > > > Mein Cod!!! > > > > It immediately hit 5350! > > > > Apparently I am not getting enough fuel flow to support high rpm. I have > not done the self tuning at high rpm yet, but I would not expect that the > fuel flow would be so low as to limit the rpm. > > > > What suggestions do you have? My ability to self tune has been limited > due to cooling issues=85especially at WOT! > > > > Lynn, it is too early to be sure yet, but your idea for the pressure > bottle looks like it is going to help the cooling a lot. It may not be t= he > complete solution, but it seems to be a step in the right direction. > Thanks! > > > > > > Bill B > ------=_Part_5065_609682.1193199882248 Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Bill,
Prior to running autotune you should manually tune to get mixture in t= he ball park. 
 
To give any more meaningful feedback I would need to know if you have = done any adjustment to Mode 3 and/or Mode 1?  Could you get the same r= esult (as cold start switch) by turning up the manual mixture control?=   What was your mixture monitor telling you during all these tests?&nb= sp; Are you out of range on the MAP correction table (already at max?) = ; Did you set Mode 3 at 22 - 24" MAP prior to making other adjustments= as suggested in the instructions?
 
But Ed's advice was good.  The fact that you could get enough= fuel flow by doing anything at the EC2 tells you that the fuel system is c= apable of delivering enough fuel (this assumes the fuel pressure was OK whi= ch your data indicates is the case).
 
The snubber and diagnostic modes are not related.  The diagnostic= s went in some time before the snubber change. Don't know which version= you have.
 
Tracy Crook
 
On 10/23/07, Bill Bradburry <bbradbu= rry@bellsouth.net> wrote:

I have been concerned that I am not= getting the static rpm that others are getting with similar props.  I= have the stock Renesis with the Performance Props 76 X 88.  I seem to= be limited to about 4200 rpm.  I hit 4800 once the other day, but did= not know what might have caused the change.  I just finished the inst= all of the pressure overflow bottle per Lynn's msg of a while back and was = running the engine up to try and eliminate any air that might still be in t= he engine.  I noticed that when the rpm reached 4200 or so, I still ha= d about an inch of throttle left.  After pondering that for a couple o= f minutes, I pushed the throttle to the wall, the engine started to run rou= gh, and I reached over and flipped the cold start switch on=85.

 

Mein Cod!!!

 

It immediately hit 5350!

 

Apparently I am not getting enough = fuel flow to support high rpm.  I have not done the self tuning at hig= h rpm yet, but I would not expect that the fuel flow would be so low as to = limit the rpm. =20

 

What suggestions do you have? = My ability to self tune has been limited due to cooling issues=85especiall= y at WOT!

 

Lynn , it is too early to be sure yet, but your idea for the pressure bottle loo= ks like it is going to help the cooling a lot.  It may not be the comp= lete solution, but it seems to be a step in the right direction.  Than= ks!

 

 

Bill B


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