Return-Path: Received: from [65.54.169.188] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3134144 for flyrotary@lancaironline.net; Mon, 29 Mar 2004 13:44:32 -0500 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 29 Mar 2004 10:44:32 -0800 Received: from 64.159.105.217 by bay3-dav158.adinternal.hotmail.com with DAV; Mon, 29 Mar 2004 18:44:31 +0000 X-Originating-IP: [64.159.105.217] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Renesis & RD-1Cdrivetesting Date: Mon, 29 Mar 2004 13:44:27 -0500 MIME-Version: 1.0 X-Mailer: MSN Explorer 7.02.0011.2700 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0006_01C41593.F44A1C90" Message-ID: X-OriginalArrivalTime: 29 Mar 2004 18:44:32.0025 (UTC) FILETIME=[DFC1F890:01C415BD] ------=_NextPart_001_0006_01C41593.F44A1C90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable No separator. I HOPE that is where the oil is going. =20 There is a speed at which the oil control rings start to hydroplane over= the oil film instead of sweeping it back into the sump. The speed is de= termined by spring tension and (mainly) condition of oil seal rings. OTO= H, I have no idea what the normal burn rate is at high speeds. Lynn or any of you car racer guys have any experience with oil burn rates= at engine speeds of 6000 - 7000 continuous? Tracy ----- Original Message ----- From: Ed Anderson Sent: Monday, March 29, 2004 7:49 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Renesis & RD-1Cdrivetesting Hi Tracy, Do you have an oil/air separator returning oil to the sump? If not, = I suspect the "oil usage" you are seeing may just be oil lost in the blow= by. In my early days with plugs up (before I built a new sump), I would = get foaming oil out the dip stick when I exceeded 5000 rpm so I built an = air/oil separator. Later I discovered that with the new sump keeping the= oil level in the block next to zero eliminated the foaming. However, I = can imagine that at 7000 rpm the oil mist and foaming as the cooling oil = pours (or is slung) from the rotors probably suspends a lot of oil in the= air which could get blow out. FWIW Ed =20 Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message ----- =20 From: Tracy Crook =20 To: Rotary motors in aircraft =20 Sent: Sunday, March 28, 2004 9:08 PM Subject: [FlyRotary] Re: Renesis & RD-1Cdrivetesting That conclusion was based on measurements of the blade angle, prop rpm & = airspeed and calculating angle to airflow along with the assumption that = stall would occur when angle exceeded 15 deg. Then this SWAG was boiled = in a pot with observations of how adversely the cooling was affected by t= he IVO (stalled air blocking inlets). In other words, it's just my best guess. One more observation on the RD-1C testing. After about 5 hours of flogg= ing my 89 vintage 13B at engine speeds up to 7050 rpm, I noticed that the= oil level was down 1/2 quart. Had never seen a detectable drop in level= before. Tracy (still doing plastic surgery on the RVotter) ------=_NextPart_001_0006_01C41593.F44A1C90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
No separator.  I HOPE that is where = the oil is going. 
 
 There is a&nbs= p;speed at which the oil control rings start to hydroplane over the oil f= ilm instead of sweeping it back into the sump.  The speed is determi= ned by spring tension and (mainly) condition of oil seal rings. = ; OTOH, I have no idea what the normal burn rate is at high speeds.
=
 
Lynn or any of you car racer guys have any experi= ence with oil burn rates at engine speeds of 6000 - 7000 continuous?
 
 
Tracy
----= - Original Message -----
From: Ed Anderson
Sent: Monday, March 29, 2004 7:49 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Renesis & R= D-1Cdrivetesting
 
Hi Tra= cy,
 
    Do you have an oil/air separator returning= oil to the sump?  If not, I suspect the "oil usage" you are seeing = may just be oil lost in the blowby.  In my early days with plugs up = (before I built a new sump), I would get foaming oil out the dip stick wh= en I exceeded 5000 rpm so I built an air/oil separator.  Later I dis= covered that with the new sump keeping the oil level in the block next to= zero eliminated the foaming.  However, I can imagine that at 7000 r= pm the oil mist and foaming as the cooling oil pours (or is slung) from t= he rotors probably suspends a lot of oil in the air which could get blow = out.
 
FWIW
 
Ed
 
 
Ed A= nderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
=
Sent: Sunday, Ma= rch 28, 2004 9:08 PM
Subject: [FlyRotary] Re: Renesis & RD-1Cdrivetesting

<= DIV>That conclusion was based on measurements of the blade angle, prop rp= m & airspeed and calculating angle to airflow along with the assumpti= on that stall would occur when angle exceeded 15 deg.  Then this SWA= G was boiled in a pot with observations of how adversely the cooling = ;was affected by the IVO (stalled air blocking inlets).
 =
In other words, it's just my best guess.
 
One more  observation on the RD-1C testing.  Afte= r about 5 hours of flogging my 89 vintage 13B at engine speeds up to 7050= rpm, I noticed that the oil level was down 1/2 quart.  Had never se= en a detectable drop in level before.
 
Tracy = (still doing plastic surgery on the RVotter)
 
 
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