Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3133338 for flyrotary@lancaironline.net; Mon, 29 Mar 2004 07:49:24 -0500 Received: from edward (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i2TCnLSn025796 for ; Mon, 29 Mar 2004 07:49:22 -0500 (EST) Message-ID: <003101c4158c$474d27a0$2402a8c0@edward> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Renesis & RD-1Cdrivetesting Date: Mon, 29 Mar 2004 07:49:30 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01C41562.5E42A220" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_002E_01C41562.5E42A220 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 = blowby. 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 the 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 = 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 seen a detectable drop = in level before. Tracy (still doing plastic surgery on the RVotter) ------=_NextPart_000_002E_01C41562.5E42A220 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Tracy,
 
    Do you have an oil/air = separator=20 returning oil to the sump?  If not, I suspect the "oil usage" you = are=20 seeing may just be oil lost in the blowby.  In my early days with = plugs up=20 (before I built a new sump), I would get foaming oil out the dip stick = when I=20 exceeded 5000 rpm so I built an air/oil separator.  Later I = discovered that=20 with the new sump keeping the oil level in the block next to zero = eliminated the=20 foaming.  However, I can imagine that at 7000 rpm the oil mist and = foaming=20 as the cooling oil pours (or is slung) from the rotors probably suspends = a lot=20 of oil in the air which could get blow out.
 
FWIW
 
Ed
 
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, = NC
----- Original Message -----
From:=20 Tracy = Crook
Sent: Sunday, March 28, 2004 = 9:08=20 PM
Subject: [FlyRotary] Re: = Renesis &=20 RD-1Cdrivetesting

That conclusion was based on measurements of the blade angle, = prop rpm=20 & airspeed and calculating angle to airflow along with the = assumption that=20 stall would occur when angle exceeded 15 deg.  Then this SWAG was = boiled=20 in a pot with observations of how adversely the cooling was = affected by=20 the 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=20 hours of flogging my 89 vintage 13B at engine speeds up to 7050 rpm, I = noticed=20 that the oil level was down 1/2 quart.  Had never seen a = detectable drop=20 in level before.
 
Tracy (still doing plastic surgery on the RVotter)
 
 
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