X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fg-out-1718.google.com ([72.14.220.154] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2607626 for flyrotary@lancaironline.net; Thu, 20 Dec 2007 20:41:13 -0500 Received-SPF: pass receiver=logan.com; client-ip=72.14.220.154; envelope-from=wdleonard@gmail.com Received: by fg-out-1718.google.com with SMTP id e12so61862fga.1 for ; Thu, 20 Dec 2007 17:40:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; bh=HNyaiv+djAFgd+UfJbdX56YvSFdm1lXLuxmrsdMEQDY=; b=oTPLb+Ca7e4jG/2bQzbtn4m/2G9Kk8VG59ryLDeYOdWMHa+V1VMxmioKC+jdLwvrRFMUn6qQsDI6wV8nILs4F7v5LGls91AjiL6BptX8ibbU7pszdzvB75OjvL+Bohg7RmGVx1tIwwcwPXiR9QlSbMJVVm9LHtZeR7J+VkKUyes= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=rtK5W0OyQg45aC1V8uB24WQ4ZMOgCNDl46Mm8Xr7kFUVPlR9u47pV+fTaMcJxJql3F04P6F1P0gwytbAheYehRQhPpq20uhcK2KnWfx/V6USrdg7Cir7m9PHcgQ31TkwhcfquE+hM3gkWHoV3zI82vwvq9WPgxKgqZHRtazlReI= Received: by 10.86.76.16 with SMTP id y16mr587411fga.71.1198201233501; Thu, 20 Dec 2007 17:40:33 -0800 (PST) Received: by 10.86.63.9 with HTTP; Thu, 20 Dec 2007 17:40:33 -0800 (PST) Message-ID: <1c23473f0712201740g42e3e87amd61ef62cfde279d4@mail.gmail.com> Date: Thu, 20 Dec 2007 17:40:33 -0800 From: "David Leonard" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: superchargers electric In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_929_27375623.1198201233491" References: ------=_Part_929_27375623.1198201233491 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline I can see adds now, in the back of Boy's Life er.. Sport Aviation.... *Fly a Dyke Delta !!! Simply install a Leaf Blower and off you go. *For plans, Send a self address envelope to Ernest at echristley@nc.rr.com Just kidding Ernest... can't wait to see it in flight. -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Dec 20, 2007 5:03 PM, Ernest Christley wrote: > Ed Anderson wrote: > > > > That old saying "..If it looks too good to be true ......" is hard to > > fault. > Well, here's my attempt at collecting some real data. An electric leaf > blower...used. The tip is constricted to three 3/4" holes that are > advertised to produce 95MPH air. I've measured it at closer to 80MPH, > which I find more believeable. The fan is 5" diameter, and has a > removable shroud that exposes more of it so that it can be used as a > leaf vacuum/mulcher. It's rated at 12A/120V and has two setting. > > I stuck a 3/8" tube down one hole, fed the pressurized air into a bottle > of colored water, which was pushed up a 1/4" tube. The tubes were held > into the bottle cap with a squirt of hot glue. I tested it full open, > and then closed off each of the holes in succession. The last > measurement was a full static test. I then removed the shroud and > tested again. > > Low setting(in H2O) High setting(in H2O) > Full open 12.75 19 > 1 closed 14.25 20.75 > 2 closed 15.375 22.25 > Full static 15.75 23 > > > No shroud > Full open 8.5 12.75 > 1 closed 8.75 13.25 > 2 closed 9.25 13.5 > Full static 9.25 13.75 > > I take away from this that: > - I will be able to make significant manifold pressure, even with a > sub-optimal solution. > - that the shroud will be the most important factor. A secondary effort > may be to get some of Ed's magical polyurethane casting goo to build an > optimal shroud. > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > ------=_Part_929_27375623.1198201233491 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline I can see adds now, in the back of Boy's Life er.. Sport Aviation....

Fly a Dyke Delta !!!
Simply install a Leaf Blower and off you go. 

For plans, Send a self address envelope to Ernest at echristley@nc.rr.com


Just kidding Ernest...  can't wait to see it in flight.

 --
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

On Dec 20, 2007 5:03 PM, Ernest Christley <echristley@nc.rr.com> wrote:
Ed Anderson wrote:
>
> That old saying "..If it looks too good to be true ......"  is hard to
> fault.
Well, here's my attempt at collecting some real data.  An electric leaf
blower...used.  The tip is constricted to three 3/4" holes that are
advertised to produce 95MPH air.  I've measured it at closer to 80MPH,
which I find more believeable.  The fan is 5" diameter, and has a
removable shroud that exposes more of it so that it can be used as a
leaf vacuum/mulcher.  It's rated at 12A/120V and has two setting.

I stuck a 3/8" tube down one hole, fed the pressurized air into a bottle
of colored water, which was pushed up a 1/4" tube.  The tubes were held
into the bottle cap with a squirt of hot glue.    I tested it full open,
and then closed off each of the holes in succession.  The last
measurement was a full static test.  I then removed the shroud and
tested again.

                      Low setting(in H2O)             High setting(in H2O)
Full open           12.75                                          19
1 closed             14.25                                          20.75
2 closed             15.375                                        22.25
Full static          15.75                                          23


No shroud
Full open           8.5                                              12.75
1 closed             8.75                                            13.25
2 closed             9.25                                             13.5
Full static          9.25                                            13.75

I take away from this that:
- I will be able to make significant manifold pressure, even with a
sub-optimal solution.
- that the shroud will be the most important factor.  A secondary effort
may be to get some of Ed's magical polyurethane casting goo to build an
optimal shroud.


--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html





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