X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from blu0-omc2-s12.blu0.hotmail.com ([65.55.111.87] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3897725 for flyrotary@lancaironline.net; Sat, 24 Oct 2009 05:45:11 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.55.111.87; envelope-from=neilak@sympatico.ca Received: from BLU0-SMTP84 ([65.55.111.72]) by blu0-omc2-s12.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sat, 24 Oct 2009 02:44:35 -0700 X-Originating-IP: [76.69.4.164] X-Originating-Email: [neilak@sympatico.ca] Message-ID: Return-Path: neilak@sympatico.ca Received: from NeilPC ([76.69.4.164]) by BLU0-SMTP84.blu0.hotmail.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Sat, 24 Oct 2009 02:44:35 -0700 From: "Neil Kruiswyk" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] RPM drop Date: Sat, 24 Oct 2009 05:44:27 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01CA546D.0D300620" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcpUevGfpckVFBDsSvWI8xJyRhAYegAEnMdA X-MimeOLE: Produced By Microsoft MimeOLE V6.1.7600.16385 X-OriginalArrivalTime: 24 Oct 2009 09:44:35.0430 (UTC) FILETIME=[98832060:01CA548E] This is a multi-part message in MIME format. ------=_NextPart_000_000A_01CA546D.0D300620 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Chris, On the power drop. it would be helpful to know what the manifold pressure is doing. Also, do you have a mixture meter (O2 sensor) in the exhaust? What is it doing? Lastly, what is the fuel pressure doing as the RPM drops? As Lynn has mentioned a number of times, best power from the rotary happens when it's temps are around 160. How hot were you getting oil and water? Neil _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris Barber Sent: October-24-09 3:23 AM To: Rotary motors in aircraft Subject: [FlyRotary] RPM drop I hooked up my front oil cooler, the aviation one that was causing a restriction in the system and leakage past the oil filter seal, in parallel today with the standard Mazda stock radiator. I cranked her up and the oil flowed and heated all parts of the system and after only one snugging of a fixture, no leaks. Temps still were about the same. I took the engine to full power. It does not like full power on the ramp. The temps raise really quickly and even after 60 seconds, I am at limits I am uncomfortable with. I can have it sit at idle for over an hour with no problem. I have fans mounted, but they do not seem to help much at high RPM's. The weather was quite cool for Houston at about 70 degrees today. On a related note. As I have mentioned I am getting just over 6000 rpm at full throttle when I enrich the mixture. HOWEVER, once at full throttle the rpm is dropping off a few hundred rpm....maybe down to 5400 rpm. If I throttle back and go back to WOT it can get to just about 6000 again....maybe not quite 6000. I can't play with it too long like this as the temps raise so quickly. Is this something obvious that I can check? Thoughts???? Thanks again. All the best, Chris Barber Houston ------=_NextPart_000_000A_01CA546D.0D300620 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Chris,

 

      =       On the power drop…  it would be helpful to know what the = manifold pressure is doing.  Also, do you have a mixture meter (O2 sensor) in the exhaust?  What is it doing?  Lastly, what is the fuel pressure = doing as the RPM drops?  As Lynn has mentioned a number of times, best power from the rotary happens when = it’s temps are around 160.  How hot were you getting oil and = water?

 

Neil

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris Barber
Sent: October-24-09 3:23 = AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] RPM = drop

 

I hooked up my front oil cooler, the aviation one that was = causing a restriction in the system and leakage past the oil filter seal, in parallel today with the standard Mazda stock radiator.  I = cranked her up and the oil flowed and heated all parts of the system and after = only one snugging of a fixture, no leaks.  Temps still were about = the same.  I took the engine to full power.  It does not like full = power on the ramp.  The temps raise really quickly and even after 60 = seconds, I am at limits I am uncomfortable with.  I can have it sit = at idle for over an hour with no problem.  I have fans mounted, but they do = not seem to help much at high RPM's.  The weather was quite cool for = Houston at = about 70 degrees today.

 

On a related note.  As I have mentioned I am getting just = over 6000 rpm at full throttle when I enrich the mixture.  HOWEVER, once = at full throttle the rpm is dropping off a few hundred rpm....maybe down to = 5400 rpm.  If I throttle back and go back to WOT it can get to just = about 6000 again....maybe not quite 6000.  I can't play with it too long = like this as the temps raise so quickly.

 

Is this something obvious that I can check?  = Thoughts????

 

Thanks again.

 

All the best,

 

Chris Barber

Houston

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