Return-Path: Received: from mail.tsisp.com ([65.23.108.44] verified) by logan.com (CommuniGate Pro SMTP 4.2b4) with ESMTP-TLS id 123460 for flyrotary@lancaironline.net; Fri, 04 Jun 2004 07:34:18 -0400 Received: from stevehome by mail.tsisp.com (Technical Support Inc.) with SMTP id CQA74584 for ; Fri, 04 Jun 2004 07:33:48 -0400 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: 3rd flight Date: Fri, 4 Jun 2004 07:36:44 -0400 Message-ID: <000b01c44a28$46e61e90$6400a8c0@WORKGROUP.local> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C44A06.BFD47E90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C44A06.BFD47E90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Re: [FlyRotary] Re: 3rd flightTerry, No. I haven't measured the pressure. I know that a manometer is used to do this, but I'm not sure of the procedure, or even what the result will tell me. Steve -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Terry L Schubert Sent: Wednesday, June 02, 2004 8:32 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 3rd flight Steve, The outlet only needs to be about 1.6 MAX times the inlet area to carry off the heat. Have you measured the pressure difference across the high and low pressure sides of the cowl to see what cooling potential you actually have? Do you know how to do that? Terry Schubert Central States Association Newsletter Editor On Wed, 02 Jun 2004 07:58:54 -0400 Bulent Aliev writes: 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_000C_01C44A06.BFD47E90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: 3rd flight
Terry,
No.  I haven't measured the pressure.  I know that a = manometer=20 is used to do this, but I'm not sure of the procedure, or even what the = result=20 will tell me.
Steve
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Terry L=20 Schubert
Sent: Wednesday, June 02, 2004 8:32 = PM
To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: 3rd=20 flight

Steve,
 
The outlet only needs to be about 1.6 MAX times the inlet area to = carry=20 off the heat.  Have you measured the pressure difference across = the high=20 and low pressure sides of the cowl to see what cooling potential you = actually=20 have?
 
Do you know how to do that?
 

Terry Schubert
Central States Association
Newsletter=20 Editor
 
 
On Wed, 02 Jun 2004 07:58:54 -0400 Bulent Aliev <atlasyts@bellsouth.net>=20 writes:
On 6/2/04 = 7:29 AM,=20 "Steve Brooks" <steve@tsisp.com> = wrote:

Rusty,
I had started with the stock Cozy cowling, = and=20 modified it for the rotary.  I left the original opening at = the rear=20 wide open to start with.  I figured that if cooling was good, = I could=20 start closing it off.  You can see the aft opening in the = attached=20 photo.  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=20 pitch, and the faster you go, it acts more like flat=20 disk.
Bulent=20
 
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