X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.129.170.194] (HELO VIRCOM1.fcdata.private) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5052308 for flyrotary@lancaironline.net; Fri, 15 Jul 2011 00:00:32 -0400 Received-SPF: none receiver=logan.com; client-ip=64.129.170.194; envelope-from=cbarber@texasattorney.net Received: from FCD-MAIL06.FCDATA.PRIVATE ([fe80::697f:d6aa:b87:78d8]) by FCD-MAIL05.FCDATA.PRIVATE ([fe80::809d:a06e:5913:452e%13]) with mapi id 14.01.0289.001; Thu, 14 Jul 2011 22:59:38 -0500 From: Chris Barber To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Oil Pressure Again Thread-Topic: [FlyRotary] Re: Oil Pressure Again Thread-Index: AQHMQpHCn5uZAidouEmAtNrw0Sgg/pTsoWvo Date: Fri, 15 Jul 2011 03:59:22 +0000 Message-ID: <2D41F9BF3B5F9842B164AF93214F3D307DC67F53@FCD-MAIL06.FCDATA.PRIVATE> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [166.139.76.11] Content-Type: multipart/alternative; boundary="_000_2D41F9BF3B5F9842B164AF93214F3D307DC67F53FCDMAIL06FCDATA_" MIME-Version: 1.0 --_000_2D41F9BF3B5F9842B164AF93214F3D307DC67F53FCDMAIL06FCDATA_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I get about 6200 static. My pressure is not getting anywhere near that now= . It was oriiginally in the high sixties after my last rebuild. Now the m= ost I am getting is about 45 and of course I do not really like running it = up with low pressure. I had not seen that rule of thumb before, but remember your manuals coustio= n regarding if you oil pressure does not come up, find out why thus my late= st quest.... ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = Tracy [rwstracy@gmail.com] Sent: Thursday, July 14, 2011 8:51 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Oil Pressure Again Chris, make it easier for Lynn and others to give you a meaningful read on = this pressure. Answer this question clearly: Do you get a minimum of 10 psi per 1000 rpm at all power settings? That is= more or less the gold standard for making go - no go decisions on oil pres= sure. Tracy Sent from my iPad On Jul 14, 2011, at 7:46 PM, Chris Barber > wrote: I hesitate asking about this again, but I am too close to possibly flying t= o drop the ball too much now. I have a drop in oil pressure again. It has= dropped from the high 60's or so to between 20 psi to 40 psi (20 to 30 at = lower RPM and only up to around 40+ as I increase power). My first thought was that it was the front o-ring and silicone ring in the = front cover. So, I pulled the front pan and replaced it. I also was able t= o check the front pressure port and the oil pump chain/key/washer etc and a= ll was good. I am about to have to pull the engine to check the bottom of the engine for= the oil pick up and rear port (after checking the hoses, but I would think= ing a blockage, depending on where it is, would increase pressure). One of= the disadvantages of the Conversion Concepts mount is that I pretty much h= ave to pull the engine to check the bottom end. My question is, other than the mentioned items, what else could cause this = sort of drop. I have hooked up a mechanical pressure gage (instead of the = RWS EM2). My concern is that it may be the front bearing as it was the onl= y part I recall being closer to being out of spec. I hate the idea of havi= ng to tear down the engine again to replace this part especially since the = engine is running all but perfectly and I was doing squawks preparing for m= y DAR inspection before this issue crept up. Also, even though I can't think of a way, is there any way to replace the f= ront stationary gear/bearing without cracking the engine...just had to ask = as I am not really liking the idea of cracking open the engine again, even = though I am getting a bit too good at it....but apparently not well enough = to make it actually work right. As opposed to mucking around with red hearings and wild goose chases, I fig= ured I would just ask again. And yes, I have been reviewing the archives a= lready. TIA Thanks Chris Barber Houston. --_000_2D41F9BF3B5F9842B164AF93214F3D307DC67F53FCDMAIL06FCDATA_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I get about 6200 static.  My pressure is not getting anywhere near = that now.  It was oriiginally in the high sixties aft= er my last rebuild.  Now the most I am getting is about 45 and of cour= se I do not really like running it up with low pressure.

 

I had not seen that rule of thumb before, but remember your manuals = ;coustion regarding if you oil pressure does not come up, find out w= hy thus my latest quest....

From: Rotary motors in aircraft [flyrotary@= lancaironline.net] on behalf of Tracy [rwstracy@gmail.com]
Sent: Thursday, July 14, 2011 8:51 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Oil Pressure Again

Chris, make it easier for Lynn and others to give you a meaningful rea= d on this pressure.  Answer this question clearly:

Do you get a minimum of 10 psi per 1000 rpm at all power settings? &nb= sp;That is more or less the gold standard for making go - no go decisions o= n oil pressure.

Tracy


Sent from my iPad

On Jul 14, 2011, at 7:46 PM, Chris Barber <cbarber@texasattorney.net> wrote:<= br>

I hesitate asking about this again, but I am too close to possibly flyin= g to drop the ball too much now.  I have a drop in oil pressure again.=   It has dropped from the high 60's or so to= between 20 psi to 40 psi (20 to 30 at lower RPM and only up to around 40+ as I increase power).

 

My first thought was that it was the front o-ring and silicone ring in t= he front cover. So, I pulled the front pan and replaced it.  I also wa= s able to check the front pressure port and the oil pump chain/key/washer e= tc and all was good.

 

I am about to have to pull the engine to check the bottom of the engine = for the oil pick up and rear port (after checking the hoses, but I wou= ld thinking a blockage, depending on where it is, would = increase pressure).  One of the disadvantages of the Conversion Concepts mount is that I pretty much have to pull the en= gine to check the bottom end.

 

My question is, other than the mentioned items, what else could cause th= is sort of drop.  I have hooked up a mechanical pre= ssure gage (instead of the RWS EM2<= a>).  My concern is that it may be the front bearing as it was the only part I recall being closer to being out of spec= .  I hate the idea of having to tear down the engine again to replace = this part especially since the engine is running all but= perfectly and I was doing squawks preparing for my DAR inspection before this issue crept up.

 

Also, even though I can't think of a way, is there any way to replace th= e front stationary gear/bearing without cracking the eng= ine...just had to ask as I am not really liking the idea of cracking open t= he engine again, even though I am getting a bit too good at it....but apparently not well enough = to make it actually work right.

 

As opposed to mucking around with red hearings and wi= ld goose chases, I figured I would just ask again.  And yes, I have be= en reviewing the archives already.

 

TIA

 

Thanks

 

Chris Barber

Houston.

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