X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iy0-f180.google.com ([209.85.210.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5052471 for flyrotary@lancaironline.net; Fri, 15 Jul 2011 03:57:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.180; envelope-from=fluffysheap@gmail.com Received: by iyh42 with SMTP id 42so847737iyh.25 for ; Fri, 15 Jul 2011 00:57:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=I1O4Eo6mNQKhvUT59fRxKBvM/+U6qgUnYACcyKshj4I=; b=rL0jIBYuzAEAON2xJD+0WigpW8rwfYO7h7hFb5wp5U3wG06C5FV/0GJ+iPFJEEowrM Js/NUTnJGRtW93knjljkOMm9V22z0NNcu136WgX3qfkZK3XB+xEgC+noJz6jtwjY/gkC Ei4SFCLKW1V8R1c7FVPxvK+H1pKqmNV5h6MTg= MIME-Version: 1.0 Received: by 10.42.148.132 with SMTP id r4mr3418974icv.200.1310716644051; Fri, 15 Jul 2011 00:57:24 -0700 (PDT) Received: by 10.231.156.82 with HTTP; Fri, 15 Jul 2011 00:57:24 -0700 (PDT) In-Reply-To: References: Date: Fri, 15 Jul 2011 01:57:24 -0600 Message-ID: Subject: Re: [FlyRotary] Oil Pressure Again From: William Wilson To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=90e6ba212311f8498804a816fff2 --90e6ba212311f8498804a816fff2 Content-Type: text/plain; charset=ISO-8859-1 I had a sending unit go bad once and do this. It didn't just read zero like you expect, it just kept showing less and less pressure. It was about a decade old at the time. On Thu, Jul 14, 2011 at 5:46 PM, Chris Barber wrote: > I hesitate asking about this again, but I am too close to possibly flying > 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 the > front cover. So, I pulled the front pan and replaced it. I also was able to > check the front pressure port and the oil pump chain/key/washer etc 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 would > 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 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 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 especiallysince 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 the > front 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 > figured I would just ask again. And yes, I have been reviewing the archivesalready. > > > > > TIA > > > > Thanks > > > > Chris Barber > > Houston. > --90e6ba212311f8498804a816fff2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I had a sending unit go bad once and do this.=A0 It didn't just read ze= ro like you expect, it just kept showing less and less pressure.=A0 It was = about a decade old at the time.

On Thu, J= ul 14, 2011 at 5:46 PM, Chris Barber <cbarber@texasattorney.net> wrote= :

I hesitate asking about this again, but I am too close to possibly flyin= g to drop the ball too much now.=A0 I have a drop in oil pressure again.=A0= It has dropped from the high=A060's or so to betw= een 20 psi to 40 psi (20 to 30 at lower RPM and only up to around 40+ as I increase power).

=A0

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.=A0 I also was a= ble to check the front pressure port and the oil pump chain/key/washer etc = and all was good.

=A0

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=A0would<= a>=A0thinking a blockage, depending on where it is, would increa= se pressure).=A0 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.

=A0

My question is, other than the mentioned items, what else could cause th= is sort of drop.=A0 I have hooked up a=A0mechanical pressure = gage (instead of the=A0RWS EM2).= =A0 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= .=A0 I hate the idea of having to tear down the engine again to replace thi= s part=A0especially since the engine is running all but perfe= ctly and I was doing squawks preparing for my DAR inspection before this issue=A0crept up.

=A0

Also, even though I can't think of a way, is there any way to replac= e the front=A0stationary gear/bearing without cracking the en= gine...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=A0apparently not well enough to = make it actually work right.

=A0

As=A0opposed to mucking around with red hearings and wild = goose chases, I figured I would just ask again.=A0 And yes, I have been rev= iewing the=A0archives already.

=A0

TIA

=A0

Thanks

=A0

Chris Barber

Houston.


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