Return-Path: Received: from mail.tsisp.com ([65.23.108.44] verified) by logan.com (CommuniGate Pro SMTP 4.2b4) with ESMTP-TLS id 121046 for flyrotary@lancaironline.net; Wed, 02 Jun 2004 14:49:14 -0400 Received: from stevehome by mail.tsisp.com (Technical Support Inc.) with SMTP id CQA74584 for ; Wed, 02 Jun 2004 14:48:46 -0400 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: 3rd flight Date: Wed, 2 Jun 2004 14:51:59 -0400 Message-ID: <00c801c448d2$afdd1450$6400a8c0@WORKGROUP.local> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00C9_01C448B1.28CB7450" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_00C9_01C448B1.28CB7450 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Re: [FlyRotary] Re: 3rd flightBulent, Thanks. I hadn't even considered that. I have a hershey kiss sipper and flow guide on it, which I think will minimize it somewhat, but that is a possibility. I haven't yet added any vortex generators in front of the NACA, and I checked with john to see if he had, and if he had any photos. He sent me a link of Eric Weslland who had done the testing of putting vortex generator on the belly. Here is a link for the write up on it, if you're interested http://home1.gte.net/res08ahw/vg/cooling.doc. I'm going to give this a try first. If I even saw half of the results that he saw, I'd be happy. I thought that it was very interesting that a 160 MPH, he saw only 50 MPH air at the NACA inlet. He had to move the air speed indicator inlet about 2" away before he saw his actual airspeed. With just 2 - 1" X 4" vortex generators located just behind the landing brake, he saw actual airspeed at the NACA inlet. That is a significant difference. John said that he had them on from day one, so I don't have any idea what difference it will make until I try it. I didn't have any aluminum angle the right size, but I do still have plenty of fiberglass, so 6 plies of BID, and a layer of peel ply later..... I'm waiting for it to cure. Steve Brooks Cozy MKIV Turbo Rotary -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Bulent Aliev Sent: Wednesday, June 02, 2004 7:59 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 3rd flight On 6/2/04 7:29 AM, "Steve Brooks" wrote: Rusty, I had started with the stock Cozy cowling, and modified it for the rotary. I left the original opening at the rear wide open to start with. I figured that if cooling was good, I could start closing it off. You can see the aft opening in the attached photo. It is probably 2-3 times the sum of all 3 scoops. Steve Steve, one possibility is that the Ivo prop’s root section is creating back pressure in flight. Years ago some canard flyers did testing in flight and found there was reverse flow around the hub area. Ivo prop’s first 1/3section from the hub has very little pitch, and the faster you go, it acts more like flat disk. Bulent ------=_NextPart_000_00C9_01C448B1.28CB7450 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: 3rd flight
Bulent,
 
Thanks.  I hadn't even considered that.  I have a = hershey kiss=20 sipper and flow guide on it, which I think will minimize it somewhat, = but that=20 is a possibility.
 
I=20 haven't yet added any vortex generators in front of the NACA, and I = checked with=20 john to see if he had, and if he had any photos.  He sent me a link = of Eric=20 Weslland who had done the testing of putting vortex generator on the=20 belly.  Here is a link for the write up on it, if you're interested = http://home1.gte.ne= t/res08ahw/vg/cooling.doc.
 
I'm=20 going to give this a try first.  If I even saw half of the results = that he=20 saw, I'd be happy.  I thought that it was very interesting that a = 160 MPH,=20 he saw only 50 MPH air at the NACA inlet.  He had to move the air = speed=20 indicator inlet about 2" away before he saw his actual airspeed.  = With just=20 2 - 1" X 4" vortex generators located just behind the landing brake, he = saw=20 actual airspeed at the NACA inlet.  That is a significant=20 difference.
 
John=20 said that he had them on from day one, so I don't have any idea what = difference=20 it will make until I try it.
 
I=20 didn't have any aluminum angle the right size, but I do still have = plenty of=20 fiberglass, so 6 plies of BID, and a layer of peel ply later..... I'm = waiting=20 for it to cure.
 
 
Steve=20 Brooks
Cozy=20 MKIV
Turbo=20 Rotary
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Bulent=20 Aliev
Sent: Wednesday, June 02, 2004 7:59 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: 3rd=20 flight

On=20 6/2/04 7:29 AM, "Steve Brooks" <steve@tsisp.com>=20 wrote:
Rusty,
I had started with the stock Cozy cowling, = and modified=20 it for the rotary.  I left the original opening at the rear = wide open=20 to start with.  I figured that if cooling was good, I could = start=20 closing it off.  You can see the aft opening in the attached = photo.=20  It is probably 2-3 times the sum of all 3=20 scoops.

Steve

Steve, one possibility = is that the=20 Ivo prop's root section is creating back pressure in flight. Years ago = some=20 canard flyers did testing in flight and found there was reverse flow = around=20 the hub area. Ivo prop's first 1/3section from the hub has very little = pitch,=20 and the faster you go, it acts more like flat = disk.
Bulent=20
------=_NextPart_000_00C9_01C448B1.28CB7450--