X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3731840 for flyrotary@lancaironline.net; Wed, 24 Jun 2009 21:50:40 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id AAFBD173832 for ; Thu, 25 Jun 2009 09:49:57 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 30F8CBEC00B for ; Thu, 25 Jun 2009 09:49:51 +0800 (WST) Message-ID: <123F25B437264DD588173569F7412D51@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Consistant progress...not sure how to act? Date: Thu, 25 Jun 2009 11:49:55 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C9F58B.0E9B5550" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 090624-0, 06/24/2009), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C9F58B.0E9B5550 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Chris, I support Al G's assumption on the larger Injector- it's for possible = turbo application, I don't know if they use the same injector for turbo = and non turbo, maybe something to check. Take-off the filter and check the filter O-ring. George (down under) Chris; Great; sounds like things are going 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?=20 Hard to know what their reasons were; but I wouldn't be concerned. = I'm 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's not an issue.. . . =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 - it should idle down to about 1000 so when = you pull the power on final the prop will help you slow down. 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't know your filter = placement, but you're probably seeing 80-90 psi pressure there. Get a = filter wrench on it and give it maybe =BD turn past hand tight. I won't = hurt the seal. What's next? Is that bird about ready to fly? Al G ------=_NextPart_000_000D_01C9F58B.0E9B5550 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Chris,
I support Al G's assumption on the = larger=20 Injector- it's for possible turbo application, I don't know if they use = the same=20 injector for turbo and non turbo, maybe something to check.
 
 Take-off the filter and check the = filter=20 O-ring.
George (down under)

 

Chris;

 

Great; sounds like things are = going =20 well.

 

First of all, with all the = talk about=20 injector sizing, I now have all my injectors matched in size per the=20 recommended size of the Mistral test pilot out of FL.  They seem = to be=20 working swell.  However, as has been noted here, they are waaaaay = larger=20 than the conventional wisdom found here at 62.7 lbs/hr = / 646cc/min. =20 Since from what I have read, Mistral has done tons of R&D, what do = ya'll=20 feel is the purpose of these large injectors? 

Hard to = know what=20 their reasons were; but I wouldn=92t be concerned.  I=92m sure = they use them=20 on the turbo version; and want run on just two.  My injectors are = 560=20 cc/min, so not that much less.  The only down side I can think of = with=20 the higher flow capability is getting smooth running at idle; so if = that=92s not=20 an issue=85. . .  

Second, after I = have moved the=20 throttle to WOT, when I move it back to idle, the idle RPM is much = higher than=20 it was before.  I may have a smooth idle around 1700 to 1800 rpm, = but=20 when I go WOT and then bring it back to idle, the RPM is now around = 2200 or=20 so.  If I "pump" the throttle a couple of  times, it tends = to settle=20 back down to the 1700 range....if I mess with the mixture, I  can = get=20 smooth idle around 1400 to 1500. 

Sounds = like maybe a=20 problem with the throttle linkage.  Can you check and see that = when you=20 pull it back the throttle plates are fully closed? Is there any = adjustable=20 idle-air bypass on your system?  And you might want to check your = idle=20 stop =96 it should idle down to about 1000 so when you pull the power = on final=20 the prop will help you slow down.

 

 The last two standard = oil filters I=20 have installed are leaking from the seal.  I checked the mounting = surface=20 and do not "see" any flaws, however, I am leaking quite a bit of = expensive=20 synthetic oil (following the first six hours on dino oil) from this=20 location.  I thought that perhaps I had tightened it by hand too = much and=20 it warped the sealing gasket.  However, it still leaks following = a less=20 tight fit.  I have never had a problem with this kind of filter=20 before.  Please correct me if I am missing something.  You = lube the=20 gasket with oil when you install and only hand tighten it.  = Should not be=20 a problem.  Any thoughts?  I have had this with the last two = filters.  The current one being a K&N...the previous an=20 STP.

First = thing to try=20 is tighten it further.  I don=92t know your filter placement, but = you=92re=20 probably seeing 80-90 psi pressure there.  Get a filter wrench on = it and=20 give it maybe =BD turn past hand tight.  I won=92t hurt the=20 seal.

 

What=92s = next? Is=20 that bird about ready to fly?

 

Al=20 G

 

 

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