Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 374918 for flyrotary@lancaironline.net; Mon, 23 Aug 2004 09:11:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040823131042.KZEV1789.imf25aec.mail.bellsouth.net@rd> for ; Mon, 23 Aug 2004 09:10:42 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: today's rev-3 report Date: Mon, 23 Aug 2004 08:10:44 -0500 Message-ID: <00ac01c48912$991b0d00$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AD_01C488E8.B0450500" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_00AD_01C488E8.B0450500 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Would like to add a comment if I may. Forgive me if I missed it but I = can't recall any mention of a bellmouth on the inlet to the throttle body. Do = you have one on your inlet? A nicely designed bellmouth might could reduce inlet drag. Carl Murakami (normally a lurker) =20 Thanks for the message Carl. This is actually the easiest place to = start, and might be just the ticket. I know that my inlet system isn't the greatest, and the last time I went through this, I bought a couple of = air horns for the TWM inlets. Since I managed to match Tracy's B drive performance with the straight inlets, I never got around to trying the = air horns. =20 =20 During the last test, I was getting 5500 static with the current inlet ducting, and 5750 with the TB open (no ducting). I need to test this = again, with the air horns in place, rather than just having the straight inlets = in the TB. If I could get another 100 rpm or so, I'd probably be in the ballpark of Tracy's C drive performance. All I'd have to do then, is = add an inlet ducting system that didn't reduce the flow any. Yep, I think this might be the next test. =20 =20 Cheers, Rusty=20 ------=_NextPart_000_00AD_01C488E8.B0450500 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Would like to add a comment if I may.  Forgive me if I missed = it but I=20 can't recall any mention of a bellmouth on the inlet to the throttle = body. =20 Do you have one on your inlet?  A nicely designed bellmouth might = could=20 reduce inlet drag.

Carl Murakami (normally a lurker)
 
Thanks for=20 the message Carl.  This is actually the easiest place to start, and = might=20 be just the ticket.  I know that my inlet system isn't the = greatest, and=20 the last time I went through this, I bought a couple of air horns for = the TWM=20 inlets.  Since I managed to match Tracy's B drive performance = with=20 the straight inlets, I never got around to trying the air=20 horns.   
 
During the=20 last test, I was getting 5500 static with the current inlet ducting, and = 5750=20 with the TB open (no ducting).  I need to test this again, with the = air=20 horns in place, rather than just having the straight inlets in the = TB.  If=20 I could get another 100 rpm or so, I'd probably be in the ballpark of = Tracy's C=20 drive performance.  All I'd have to do then, is add an inlet = ducting system=20 that didn't reduce the flow any.  Yep, I think this might be the = next=20 test. 
 
Cheers,
Rusty=20
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