X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3731790 for flyrotary@lancaironline.net; Wed, 24 Jun 2009 20:50:58 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao107.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090625005018.PMQV18948.fed1rmmtao107.cox.net@fed1rmimpo02.cox.net> for ; Wed, 24 Jun 2009 20:50:18 -0400 Received: from BigAl ([72.192.135.181]) by fed1rmimpo02.cox.net with bizsmtp id 80qH1c00A3uzsQg040qHAe; Wed, 24 Jun 2009 20:50:17 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=ahCr0aw7mokA:10 a=XVvD1CXMhcINeQlrj40A:9 a=ORUmxf3xy1M1MlDaGakgq2sVpXIA:4 a=-FspeAoqOhoQMMwb4VgA:9 a=M9o0ScrmQVpMRkpKd5oA:7 a=9qo77pwZ8QitRj7tjRWAQ72AJdQA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Consistant progress...not sure how to act? Date: Wed, 24 Jun 2009 17:50:32 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C9F4F4.4536B2E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 Importance: Normal Thread-Index: Acn1IypaOeY79j/2TmGNQeT3w6g8TQAEWMcg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C9F4F4.4536B2E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =20 Chris; =20 Great; sounds like things are going well. =20 First of all, with all the talk about injector sizing, I now have all my injectors matched in size per the recommended size of the Mistral test = pilot out of FL. They seem to be working swell. However, as has been noted = here, they are waaaaay larger than the conventional wisdom found here at 62.7 lbs/hr / 646cc/min. Since from what I have read, Mistral has done tons = of R&D, what do ya'll feel is the purpose of these large injectors?=20 Hard to know what their reasons were; but I wouldn=92t be concerned. = I=92m sure they use them on the turbo version; and want run on just two. My = injectors are 560 cc/min, so not that much less. The only down side I can think = of with the higher flow capability is getting smooth running at idle; so if that=92s not an issue=85. . . =20 Second, after I have moved the throttle to WOT, when I move it back to = idle, the idle RPM is much higher than it was before. I may have a smooth = idle around 1700 to 1800 rpm, but when I go WOT and then bring it back to = idle, the RPM is now around 2200 or so. If I "pump" the throttle a couple of times, it tends to settle back down to the 1700 range....if I mess with = the mixture, I can get smooth idle around 1400 to 1500.=20 Sounds like maybe a problem with the throttle linkage. Can you check = and see that when you pull it back the throttle plates are fully closed? Is there any adjustable idle-air bypass on your system? And you might want = to check your idle stop =96 it should idle down to about 1000 so when you = pull the power on final the prop will help you slow down. =20 The last two standard oil filters I have installed are leaking from the seal. I checked the mounting surface and do not "see" any flaws, = however, I am leaking quite a bit of expensive synthetic oil (following the first = six hours on dino oil) from this location. I thought that perhaps I had tightened it by hand too much and it warped the sealing gasket. = However, it still leaks following a less tight fit. I have never had a problem with this kind of filter before. Please correct me if I am missing = something. You lube the gasket with oil when you install and only hand tighten it. Should not be a problem. Any thoughts? I have had this with the last = two filters. The current one being a K&N...the previous an STP. First thing to try is tighten it further. I don=92t know your filter placement, but you=92re probably seeing 80-90 psi pressure there. Get a filter wrench on it and give it maybe =BD turn past hand tight. I = won=92t hurt the seal. =20 What=92s next? Is that bird about ready to fly? =20 Al G =20 =20 ------=_NextPart_000_0004_01C9F4F4.4536B2E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

 

Chris;

 

Great; sounds like things are = going=A0 well.

 

First of all, with all the talk about = injector sizing, I now have all my injectors matched in size per the recommended size of = the Mistral test pilot out of FL.  They seem to be working swell.  However, as has been noted here, they are waaaaay larger than the = conventional wisdom found here at 62.7 lbs/hr / 646cc/min.  Since from what = I have read, Mistral has done tons of R&D, what do ya'll feel is the = purpose of these large injectors? 

Hard to know what their reasons = were; but I wouldn’t be concerned.=A0 I’m sure they use them on = the turbo version; and want run on just two. =A0My injectors are 560 cc/min, so = not that much less. =A0The only down side I can think of with the higher flow = capability is getting smooth running at idle; so if that’s not an = issue…. . .  

Second, after I have moved the throttle = to WOT, when I move it back to idle, the idle RPM is much higher than it was before.  I may have a smooth idle around 1700 to 1800 rpm, but when = I go WOT and then bring it back to idle, the RPM is now around 2200 or = so.  If I "pump" the throttle a couple of  times, it tends to = settle back down to the 1700 range....if I mess with the mixture, I  can = get smooth idle around 1400 to 1500. 

Sounds like maybe a problem with = the throttle linkage. =A0Can you check and see that when you pull it back = the throttle plates are fully closed? Is there any adjustable idle-air = bypass on your system? =A0And you might want to check your idle stop – it = should idle down to about 1000 so when you pull the power on final the prop will = help you slow down.

 

=A0The last two standard oil filters I have = installed are leaking from the seal.  I checked the mounting surface and do = not "see" any flaws, however, I am leaking quite a bit of = expensive synthetic oil (following the first six hours on dino oil) from this location.  I thought that perhaps I had tightened it by hand too = much and it warped the sealing gasket.  However, it still leaks following a = less tight fit.  I have never had a problem with this kind of filter before.  Please correct me if I am missing something.  You = lube the gasket with oil when you install and only hand tighten it.  Should = not be a problem.  Any thoughts?  I have had this with the last two filters.  The current one being a K&N...the previous an = STP.

First thing to try is tighten it further.=A0 I don’t know your filter placement, but you’re = probably seeing 80-90 psi pressure there.=A0 Get a filter wrench on it and give = it maybe =BD turn past hand tight.=A0 I won’t hurt the seal.

 

What’s next? Is that bird = about ready to fly?

 

Al G

 

 

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