X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2160342 for flyrotary@lancaironline.net; Thu, 05 Jul 2007 18:07:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id l65M707p020708 for ; Thu, 5 Jul 2007 18:07:01 -0400 (EDT) Message-ID: <000701c7bf50$d4a4d690$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Ok on air bleed Re: [Fwd: [Fwd: RV-7A Cooling]] Date: Thu, 5 Jul 2007 18:07:08 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C7BF2F.4D3D7570" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C7BF2F.4D3D7570 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ]] Buly, Ed, Mark I have an air flow diverter already built and will try it soon. It is = 1/8 foam core board covered with one thin layer of glass. =20 Good, hopefully that will cure the problem. The oil filter mount came from Summit if I remember correctly. I used = the the arrows cast into the mount for oil in and out. I will check by = taking the filter off and pump oil out by turning the prop. Oil should = come into the filter near the outside - go through the filter media and = exit the center - correct? Ok, if it had markings on it for IN and OUT you are OK, some do not = and folks have gotten the ins and outs confused (your's truly for one) = . Yes, you are correct about the flow of the oil in the filter. I have looked at the oil tank temperatures with an IR theometer. = I'll record the data as the engine oil warms up next time I run it. Buly - its great to hear you have such low temperatures with the same = oil cooler. There is hope for me!! My oil cooler is from a 13 B = powered Mazda . The AN-4 line out the top of the oil cooler has an 0.020 in. orfice. = It is used to bleed out any air trapped in the high end of the oil = cooler. The delta pressure across the orfice is very low because of oil = filter is the only restriction in theparallel main oil return line. The = water radiator is also using an orfice and an AN-4 line to blead air out = of it's high end. I think these blead lines should only pass a very = small amount of fluid while automatically removing any trapped air. I agree that small a hole should not be of any significance in the = equation.=20 Dennis,=20 I used the same oil cooler on my Cosmo 13B and it was cooling too = much in flight 137F at cruise.=20 I see one thing you have done that disturbs me. The oil line tapped = at the high end of the oil cooler going into the oil filter adapter = plate.. By doing this, great percentage of the oil is bypassing the oil = cooler core and going back into the block.=20 If it was me I'll block this outlet, and turn the oil cooler around, = so the oil gets in and out at the higher end. This will prevent an air = lock at the high end.=20 Buly=20 ------=_NextPart_000_0004_01C7BF2F.4D3D7570 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
 ]]

Buly, Ed, Mark
I have an air flow diverter already built and = will try=20 it soon.  It is 1/8 foam core board covered with one thin layer = of=20 glass. 
 
      =20 Good, hopefully that will cure the problem.

The oil filter mount came from Summit if I remember = correctly. =20 I used the the arrows cast into the mount for oil in and out.  I = will=20 check by taking the filter off and pump oil out by turning the = prop.  Oil=20 should come into the filter near the outside - go through the filter = media and=20 exit the center - correct?
Ok, if it had markings on it = for IN and=20 OUT you are OK, some do not and folks have gotten the  ins and = outs=20 confused (your's truly for one) .  Yes, you are correct about the = flow of=20 the oil in the filter.

I have = looked at the=20 oil tank temperatures with an IR  theometer.  I'll record = the data=20 as the engine oil warms up next time I run it.

Buly - its great = to hear=20 you have such low temperatures with the same oil cooler.  There = is hope=20 for me!!  My oil cooler is from a 13 B powered Mazda
.
The = AN-4=20 line out the top of the oil cooler has an 0.020 in. = orfice.  It is=20 used to bleed out any air trapped in the high end of the oil = cooler.  The=20 delta pressure across the orfice is very low because of oil filter is = the only=20 restriction in theparallel main oil return line.  The water = radiator is=20 also using an orfice and an AN-4 line to blead air out of it's = high=20 end.   I think these blead lines should only pass a very = small=20 amount of fluid while automatically removing any trapped = air.

I agree that small a hole should = not be of any=20 significance in the equation. 
Dennis, =
I used=20 the same oil cooler on my Cosmo 13B and it was cooling too  = much in=20 flight 137F at cruise.
I see one thing you have done that = disturbs me.=20 The oil line tapped  at the high end of the oil cooler going = into the=20 oil filter adapter  plate.. By doing this, great percentage of = the oil=20 is bypassing the  oil cooler core and going back into the = block.
If=20 it was me I'll block this outlet, and turn the oil cooler = around,  so=20 the oil gets in and out at the higher end. This will prevent = an  air=20 lock at the high end.
Buly




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