X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from proton.sasknet.sk.ca ([142.165.20.178] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTPS id 4989959 for flyrotary@lancaironline.net; Fri, 20 May 2011 17:39:20 -0400 Received-SPF: none receiver=logan.com; client-ip=142.165.20.178; envelope-from=hjjohnson@sasktel.net Received: from pps.filterd (proton [127.0.0.1]) by proton.sasknet.sk.ca (8.14.3/8.14.3) with SMTP id p4KLcFbj021547 for ; Fri, 20 May 2011 15:38:43 -0600 Received: from bgmpomr1.sasknet.sk.ca (bgmpOMR1.sasknet.sk.ca [142.165.72.22]) by proton.sasknet.sk.ca with ESMTP id we01k0qpd-1 for ; Fri, 20 May 2011 15:38:42 -0600 Received: from sasktel.net ([192.168.234.97]) by bgmpomr1.sasknet.sk.ca (SaskTel eMessaging Service) with ESMTP id <0LLI00HMLK4I5W10@bgmpomr1.sasknet.sk.ca> for flyrotary@lancaironline.net; Fri, 20 May 2011 15:38:42 -0600 (CST) Received: from [192.168.234.25] (Forwarded-For: [98.125.90.150]) by cgmail1.sasknet.sk.ca (mshttpd); Fri, 20 May 2011 15:38:42 -0600 Date: Fri, 20 May 2011 15:38:42 -0600 From: H & J Johnson Subject: Re: [FlyRotary] Re: Blower experiment: FAIL To: Rotary motors in aircraft Message-id: <2c4d3d8a0.4dd68b02@sasktel.net> MIME-version: 1.0 X-Mailer: Sun Java(tm) System Messenger Express 6.1 HotFix 0.20 (built Feb 27 2006) Content-type: text/html; charset=us-ascii Content-language: en Content-transfer-encoding: 7BIT Content-disposition: inline X-Accept-Language: en Priority: normal X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.4.6813,1.0.148,0.0.0000 definitions=2011-05-20_05:2011-05-20,2011-05-20,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=2 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=5.0.0-1012030000 definitions=main-1105200249

Ernest, yes that is very possible, also a cast impeller would be possible [I actually designed one for my current dust collector but didn't end up casting it [bought instead due to time constraints]

I could also get it dynamically balanced to ~3500rpm if need be.

Jarrett Johnson
www.innovention-tech.com

----- Original Message -----

From: Ernest Christley <echristley@att.net>

Date: Thursday, May 19, 2011 6:50 am

Subject: [FlyRotary] Re: Blower experiment: FAIL

> On 05/18/2011 10:53 PM, Terry Adams wrote:
> > Ernst,
> > I agree with Ed, good you gave it a try. You learned some
> things
> > while making the attempt.
> > 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.
>