Return-Path: Received: from [65.54.169.57] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 490413 for flyrotary@lancaironline.net; Fri, 29 Oct 2004 02:13:23 -0400 Received-SPF: none receiver=logan.com; client-ip=65.54.169.57; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 28 Oct 2004 23:06:20 -0700 Received: from 65.54.98.159 by BAY3-DAV27.phx.gbl with DAV; Fri, 29 Oct 2004 00:42:11 +0000 X-Originating-IP: [65.54.98.159] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] There I was, half way to Vegas... Date: Thu, 28 Oct 2004 20:39:31 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D0_01C4BD2E.3A3C6B80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Thu, 28 Oct 2004 20:39:31 -0400 Message-ID: X-OriginalArrivalTime: 29 Oct 2004 06:06:20.0657 (UTC) FILETIME=[69309610:01C4BD7D] This is a multi-part message in MIME format. ------=_NextPart_000_00D0_01C4BD2E.3A3C6B80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Don't have a solution short of building a new intake or a really tight = airbox with longer air feed path to throttle body. Just one more reason = I don't like injectors on the far end of intake. I can confirm that most people vastly underestimate the violent = activity (including reverse airflow) in an intake system.=20 Last point: It is not possible to program the EC2 to run only on the = secondaries with the staging level . Did you really mean primaries? = You could accomplish what you wanted by disabling the unwanted injectors = if you installed the disable switches. Tracy ----- Original Message -----=20 From: DaveLeonard=20 To: Rotary motors in aircraft=20 Sent: Thursday, October 28, 2004 12:40 AM Subject: [FlyRotary] There I was, half way to Vegas... So as you know I have converted to a normally aspirated state. I went = flying to vegas this weekend, and actually won $300 net even after my = wife lost $100. The engine ran as well as coulld be expected considering my sea level = WOT MAP is only 28". Max n.a. static is 46-4700 RPM. Plenty enough to = take off well over Van's recomended gross and fly at 130 KTAS (using = only 8 gal/hr). Better than a typical cessna - but less tan I had with = the turbo. Anyway, The point of this e-mail is to discuss injector backflow... I have = always had a problem with a faint fuel smell in the cocktpit. As part = of the n.a. conversion I removed the plenum over the intake (see pic.). = Every flight since removing that plenum has included a rather strong = smell of fuel coming in theough the passenger air vent. This smell is = only evident after take off. It turns out that my TWM secondaries, = mounted on a downhill part of the intakes, freely leak fuel down and out = of the bellmouths even during WOT operations. This leaked fuel then = seeps out the cracks in my cowl and goes into the passenger air vent. = It also loostly covers everything on that side of the engine, and the = side of the fues around the pax air intake with 2-stroke oil. This was = enouth to make me uncomfortable. The wife, who is still reeling from = the emergency landing after the turbo broke, now states that she will = only fly cessnas from now on - due to the very disconcerting smell of = fuel the whole trip - and I can't blamer her. While in vegas I tried to program the 'B' computer to use the = secondarys only above 27" MAP but I guess the adjustment did not take = because we still had the same condition on return. I have checked and = re-checked the fuel system far any evidence of a leak. It is coming out = the back end of the intake for sure. Something to think about if you are installing the TWM injectors near = the air inlet end. Dave Leonard ------=_NextPart_000_00D0_01C4BD2E.3A3C6B80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Don't have a solution short of building a new intake or a = really tight=20 airbox with longer air feed path to throttle body.  Just one more = reason I=20 don=92t like injectors on the far end of intake.
 
 I can confirm that most people vastly underestimate the = violent=20 activity (including reverse airflow) in an intake system. 
 
Last point:  It is not possible to program the EC2 to run only = on the=20 secondaries with the staging level .  Did you really mean=20 primaries?   You could accomplish what you wanted by disabling = the unwanted injectors if you installed the disable = switches.
 
Tracy
----- Original Message -----
To: Rotary motors in = aircraft
Sent: Thursday, October 28, = 2004 12:40=20 AM
Subject: [FlyRotary] There I = was, half=20 way to Vegas...

So as you know I have converted to a normally aspirated = state.  I=20 went flying to vegas this weekend, and actually won $300 net even = after my=20 wife lost $100.
 
The engine ran as well as coulld be expected considering my sea = level WOT=20 MAP is only 28".  Max n.a. static is 46-4700 RPM.  Plenty = enough to=20 take off well over Van's recomended gross and fly at 130 KTAS (using = only 8=20 gal/hr).  Better than a typical cessna - but less tan I had with = the=20 turbo.  Anyway,
 
The point of this e-mail is to discuss injector backflow...  = I have=20 always had a problem with a faint fuel smell in the cocktpit.  As = part of=20 the n.a. conversion I removed the plenum over the intake (see = pic.). =20 Every flight since removing that plenum has included a rather strong = smell of=20 fuel coming in theough the passenger air vent.  This smell is = only=20 evident after take off.  It turns out that my TWM secondaries, = mounted on=20 a downhill part of the intakes, freely leak fuel down and out of the=20 bellmouths even during WOT operations.  This leaked fuel then = seeps out=20 the cracks in my cowl and goes into the passenger air vent.  It = also=20 loostly covers everything on that side of the engine, and the side of = the fues=20 around the pax air intake with 2-stroke oil.  This was enouth to = make me=20 uncomfortable.  The wife, who is still reeling from the emergency = landing=20 after the turbo broke, now states that she will only fly cessnas from = now on -=20 due to the very disconcerting smell of fuel the whole trip - and I = can't=20 blamer her.
 
While in vegas I tried to program the 'B' computer to use the = secondarys=20 only above 27" MAP but I guess the adjustment did not take because we = still=20 had the same condition on return.  I have checked and re-checked = the fuel=20 system far any evidence of a leak.  It is coming out the back end = of the=20 intake for sure.
 
Something to think about if you are installing the TWM injectors = near the=20 air inlet end.
 
Dave=20 Leonard
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