X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from bay0-omc3-s31.bay0.hotmail.com ([65.54.246.231] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1971563 for flyrotary@lancaironline.net; Fri, 06 Apr 2007 18:46:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.231; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.90]) by bay0-omc3-s31.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2668); Fri, 6 Apr 2007 15:46:02 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 6 Apr 2007 15:46:02 -0700 Message-ID: Received: from 4.171.114.21 by BAY115-DAV18.phx.gbl with DAV; Fri, 06 Apr 2007 22:45:59 +0000 X-Originating-IP: [4.171.114.21] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Renesis full power fuel burn / EC2 injector driver change Date: Fri, 6 Apr 2007 18:45:51 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D3_01C7787B.CCEE0550" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.50.0034.2000 Seal-Send-Time: Fri, 6 Apr 2007 18:45:51 -0400 X-OriginalArrivalTime: 06 Apr 2007 22:46:02.0354 (UTC) FILETIME=[5A4CF520:01C7789D] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_00D3_01C7787B.CCEE0550 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Renesis fuel burn No closely calibrated fuel burn numbers yet because I'm starting over on = calibrating after the injector snubber change which changed everything. = The maximum fuel burn will probably not change much although that is = not a useful number anyway IMO. The only time the engine is run at = those conditions is when racing at or near sea level. =20 EC2 injector drive snubber update. On the subject of the injector driver snubber change, I had hoped to = make it an easy to do in the field thing but it did not turn out that = way. The physical change is fairly simple (adds a single part to the = board) but the change in injector drive pulse width requirement was so = radical that it is beyond the current range of the injector flow rate = adjustment (Mode 3). This requires an update to the EC2 software so it = has to be done here : ( The same thing applies to the EM2 since it determines the fuel flow by = looking at the injector pulse on time. It could not be recalibrated to = compensate for the change so it's software had to be updated as well. OTOH, if you are currently flying the EC2 and/or EM2 and you are happy = with the way it is running, there is no pressing need to change = anything. This is not a safety of flight issue.=20 This change is only necessary if you are finding it impossible to get = the engine to run smoothly at idle. Note that this is not the only = thing that can cause rough idle so only do this as a last resort to fix = idle problems. Since I only today got the EM2 software changes installed, I still do = not know if there is any fuel burn improvements as a result of the = snubber change. All EC2s shipped since March 20 have this change = incorporated. Tracy=20 ----- Original Message -----=20 From: Bobby J. Hughes=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 04, 2007 11:37 AM Subject: [FlyRotary] Renesis fuel power fuel burn.. Question for Tracy Tracy, Do you have any revised data on your Renesis max fuel burn after fine = tuning? You web site shows 20.8g per hour. If I remember correctly this = was one of your early test flights. Thanks, Bobby J Hughes (new engine mount, new intake, more fiberglass,err)=20 ------=_NextPart_000_00D3_01C7787B.CCEE0550 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Renesis fuel burn
 
No closely calibrated fuel burn numbers yet because I'm starting = over on=20 calibrating after the injector snubber change which changed=20 everything.   The maximum fuel burn will probably = not change=20 much although that is not a useful number anyway IMO.  The = only time=20 the engine is run at those conditions is when racing at or near sea = level. =20
 
EC2 injector drive snubber update.
 
On the subject of the injector driver snubber change,  I had = hoped to=20 make it an easy to do in the field thing but it did not turn out that = way. =20 The physical change is fairly simple (adds a single part to the board) = but the=20 change in injector drive pulse width requirement was so radical that it = is=20 beyond the current range of the injector flow rate adjustment (Mode=20 3).   This requires an update to the EC2 software so it has to = be done=20 here : (
 
The same thing applies to the EM2 since it determines the fuel flow = by=20 looking at the injector pulse on time.   It could not be=20 recalibrated to compensate for the change so it's software had to be = updated as=20 well.
 
OTOH, if you are currently flying the EC2 and/or EM2 and you are = happy with=20 the way it is running, there is no pressing need to change = anything.  This=20 is not a safety of flight issue. 
 
 This change is only necessary if you are finding it = impossible to get=20 the engine to run smoothly at idle.  Note that this is not the only = thing=20 that can cause rough idle so only do this as a last resort to fix idle=20 problems.
 
Since I only today got the EM2 software changes installed, I still = do not=20 know if there is any fuel burn improvements as a result of the snubber=20 change.  All EC2s shipped since March 20 have this change=20 incorporated.
 
Tracy 
 
----- Original Message -----
To: Rotary motors in = aircraft
Sent: Wednesday, April 04, 2007 = 11:37=20 AM
Subject: [FlyRotary] Renesis = fuel power=20 fuel burn.. Question for Tracy

Tracy,
 
Do = you have any=20 revised data on your Renesis max fuel burn after fine tuning? You web = site=20 shows 20.8g per hour. If I remember correctly this was one of your = early test=20 flights.
 
Thanks,
 
Bobby J=20 Hughes
(new=20 engine mount, new  intake, more fiberglass,err) =
 
 
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