X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta06.westchester.pa.mail.comcast.net ([76.96.62.56] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTP id 4988524 for flyrotary@lancaironline.net; Thu, 19 May 2011 09:21:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.62.56; envelope-from=wschertz@comcast.net Received: from omta13.westchester.pa.mail.comcast.net ([76.96.62.52]) by qmta06.westchester.pa.mail.comcast.net with comcast id lRLP1g00A17dt5G56RM26g; Thu, 19 May 2011 13:21:02 +0000 Received: from WschertzPC ([71.57.77.95]) by omta13.westchester.pa.mail.comcast.net with comcast id lRM01g00r23NHuF3ZRM11i; Thu, 19 May 2011 13:21:02 +0000 Message-ID: From: "Bill Schertz" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Blower experiment: FAIL Date: Thu, 19 May 2011 08:20:56 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003B_01CC15FD.AD8CD960" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3508.1109 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3508.1109 This is a multi-part message in MIME format. ------=_NextPart_000_003B_01CC15FD.AD8CD960 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ernest, Most dust collectors spin at 3600 rpm when run by AC. About 1/2 what you = want them to spin at. Bill Schertz KIS Cruiser #4045 N343BS Phase one testing Completed From: Ernest Christley=20 Sent: Thursday, May 19, 2011 7:50 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Blower experiment: FAIL On 05/18/2011 10:53 PM, Terry Adams wrote:=20 Ernst, I agree with Ed, good you gave it a try. You learned some things = while making the attempt. =20 Perhaps testing with an electric motor might be good. In our cabinet shop we had a dust collector which would really wind up = in RPMs. It was a cast impellor and housing and it was tough enough to = suck up dust and wood chips. Unfortunately that was years ago so I = can't give you any details about RPM, suction, size, etc. But have a = look at a dust collector at a tool supply house, maybe you'll get some = new ideas. Excellent idea, Terry!! Really, I have the dimensional design worked out. There is all sorts of = things that "people who really know what they're doing" do to the = impeller fins in order to go from 80% efficiency to 85%. I'm already = starting with a sub-optimal configuration, and I've decided that = constructability outweighs getting the ultimate in efficiency at this = point. I've been looking around to see if there is a commercially = available impeller that I could re-purpose. I've search backpack leaf = blowers to no avail, but haven't even thought about dust collectors. Jarrett, if I sent you a CAD drawing, could your CNC cut me an impeller? I found the oil leak in my gearbox last night, and it wasn't even close = to where I thought it was. The oil is still clean so it is really hard = to tell where it is coming from. I stood it upright and poured some = dark two-stroke oil into it. Spun it a bit, and let it sit overnight. = Had a nice little blue streak pointing straight at the culprit this = morning. ------=_NextPart_000_003B_01CC15FD.AD8CD960 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ernest,
Most dust collectors spin at 3600 rpm when run by AC. About 1/2 = what you=20 want them to spin at.
 
Bill=20 Schertz
KIS Cruiser #4045
N343BS
Phase one testing = Completed
 
Sent: Thursday, May 19, 2011 7:50 AM
Subject: [FlyRotary] Re: Blower experiment: = FAIL
 
On=20 05/18/2011 10:53 PM, Terry Adams wrote:=20
Ernst,
I agree with Ed, good you gave it a try.  You = learned=20 some things while making the attempt. 
Perhaps testing with = an=20 electric motor might be good.
In our cabinet shop we had a dust = collector=20 which would really wind up in RPMs.  It was a cast impellor and = housing=20 and it was tough enough to suck up dust and wood chips.  = Unfortunately=20 that was years ago so I can't give you any details about RPM, suction, = size,=20 etc.  But have a look at a dust collector at a tool supply house, = maybe=20 you'll get some new ideas.

Excellent idea,=20 Terry!!

Really, I have the dimensional design worked out.  = There is=20 all sorts of things that "people who really know what they're doing" do = to the=20 impeller fins in order to go from 80% efficiency to 85%.  I'm = already=20 starting with a sub-optimal configuration, and I've decided that=20 constructability outweighs getting the ultimate in efficiency at this=20 point.  I've been looking around to see if there is a commercially=20 available impeller that I could re-purpose.  I've search backpack = leaf=20 blowers to no avail, but haven't even thought about dust=20 collectors.

Jarrett, if I sent you a CAD drawing, could your CNC = cut me=20 an impeller?

I found the oil leak in my gearbox last night, and = it wasn't=20 even close to where I thought it was.  The oil is still clean so it = is=20 really hard to tell where it is coming from.  I stood it upright = and poured=20 some dark two-stroke oil into it.  Spun it a bit, and let it sit=20 overnight.  Had a nice little blue streak pointing straight at the = culprit=20 this morning.
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