X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao101.cox.net ([68.230.241.45] verified) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4319026 for flyrotary@lancaironline.net; Wed, 19 May 2010 01:24:09 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.45; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao101.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100519052334.XYBQ2579.fed1rmmtao101.cox.net@fed1rmimpo02.cox.net> for ; Wed, 19 May 2010 01:23:34 -0400 Received: from BigAl ([72.199.216.236]) by fed1rmimpo02.cox.net with bizsmtp id KHKs1e00H56cS2o04HKsjc; Wed, 19 May 2010 01:19:53 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=RDGknaWEColYBAosNzHWAUqP/VR6Ab6kioi0WieaKDU= c=1 sm=1 a=q8OS1GolVHwA:10 a=lN8H/RjlhkCyIsyuOn2r7w==:17 a=Ia-xEzejAAAA:8 a=YWISOAoqAAAA:8 a=W9yeaXTHAAgBi48ArVIA:9 a=NUzeHsn_4v-Lsz-4iqW21q55N4wA:4 a=wPNLvfGTeEIA:10 a=VvPTdWEW8HYA:10 a=EzXvWhQp4_cA:10 a=ezKOY-XzVVIcHdrX:21 a=2exJCZcxcZ1kjpL_:21 a=mUhtHcDFchijrwvuEM4A:9 a=_iUypyoerOt7BDVFvT0A:7 a=tMjItwcanMZXK-Df9jPnmJrAJHMA:4 a=lN8H/RjlhkCyIsyuOn2r7w==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] ground test cooling Date: Tue, 18 May 2010 22:23:11 -0800 Message-ID: <1FD8408029E048FCAB653E67FE86833E@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CAF6D8.B385F530" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 In-Reply-To: Importance: Normal Thread-Index: Acr3CAY9yLfJPaS4TPqo3GGCT1BN2gAEgu9Q X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 This is a multi-part message in MIME format. ------=_NextPart_000_000F_01CAF6D8.B385F530 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kevin; =20 When running without a prop you will never produce more than a few hp; = so the amount of airflow required for cooling is pretty low. A high speed axial flow fan near the rad should do it. I used a centrifugal blower = from a furnace for doing flow distribution and pressure drop tests on my = radiator and oil cooler. As I recall it put out about 1200 -1400 cfm; which if = ducted to your rad would be good to about 40 - 50 hp =96 way more than you=92ll = ever get to without a prop. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin lane Sent: Tuesday, May 18, 2010 8:01 PM To: Rotary motors in aircraft Subject: [FlyRotary] ground test cooling =20 I would like to run my engine on it's test stand without the prop. I'd = like to rig up electric fans to blow thru the radiators. will I have better = luck with a leaf blower or one of those squirrel cage type blowers? the leaf blower has high velocity, but it seems the big squirrel cage blowers = [like used in forced air furnaces] move a large quantity of air and may handle back pressure better. I assume others have already figured this out. I quit when water hit 210=B0. the leaf blower I had on the water rad = didn't seem to make a huge difference, but my ducting was a pretty poor first attempt. my tests so far have had no potential of runaway rpms, plus the MSD = ignition has rev limiters, so I am not worried about that. being killed by a = prop is a MUCH more potential accident. I have a wood prop and is was too scary = to be around when mounted. I don't have water at the airport, so that = solution isn't too easy, I'd have to bring water and pump it. at some point I'm going to have to address the muffler too. last run got up to 4000rpm. = damn that is loud, even with my noise canceling headsets turned on. my new = s/s exhaust manifold is starting to turn a golden color. =20 =20 KevinLane Carpentry www.KevinLaneCarpentry.com ------=_NextPart_000_000F_01CAF6D8.B385F530 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Kevin;

 

When running without a prop you = will never produce more than a few hp; so the amount of airflow required for = cooling is pretty low.=A0 A high speed axial flow fan near the rad should do = it.=A0 I used a centrifugal blower from a furnace for doing flow distribution and = pressure drop tests on my radiator and oil cooler. As I recall it put out about = 1200 -1400 cfm; which if ducted to your rad would be good to about 40 - 50 hp = – way more than you’ll ever get to without a prop.

 

Al

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin lane
Sent: Tuesday, May 18, = 2010 8:01 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = ground test cooling

 

I would like to = run my engine on it's test stand without the prop.  I'd like to rig up = electric fans to blow thru the radiators.  will I have better luck with a = leaf blower or one of those squirrel cage type blowers?  the leaf blower = has high velocity, but it seems the big squirrel cage blowers [like used in = forced air furnaces] move a large quantity of air and may handle back pressure = better.  I assume others have already figured this out.  I quit when water = hit 210=B0.  the leaf blower I had on the water rad didn't seem to make = a huge difference, but my ducting was a pretty poor first = attempt.

my tests so far = have had no potential of runaway rpms, plus the MSD ignition has rev limiters, so = I am not worried about that.  being killed by a prop is a MUCH more = potential accident.  I have a wood prop and is was too scary to be around = when mounted.  I don't have water at the airport, so that solution isn't = too easy, I'd have to bring water and pump it.  at some point I'm going = to have to address the muffler too.  last run got up to 4000rpm.  = damn that is loud, even with my noise canceling headsets turned = on.  my new s/s exhaust manifold is starting to turn a golden = color.

 

 

KevinLane = Carpentry
www.KevinLaneCarpentry.com=

------=_NextPart_000_000F_01CAF6D8.B385F530--