Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.93.67.83] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2575406 for flyrotary@lancaironline.net; Wed, 10 Sep 2003 20:47:59 -0400 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-02.southeast.rr.com (8.12.5/8.12.2) with SMTP id h8B0iFpN023105 for ; Wed, 10 Sep 2003 20:44:17 -0400 (EDT) Message-ID: <001a01c377fc$f13126a0$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] turbo wastegate requirements Date: Wed, 10 Sep 2003 20:37:53 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0017_01C377DB.68FA8EA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0017_01C377DB.68FA8EA0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi Paul, I have turbocharged automobiles (two of them) in my short life span, = so I know a little bit about turbo, but not an expert by any means, = however, I would not under any circumstance even have that device active = in my airplane much less let it control fuel to a engine under boost. = If it killed your ignition instead of your fuel it still be a bad idea = (IMHO), but at least then you wouldn't risk damaging your engine from = lean fuel induced detonation. =20 I for one don't want any computer or other device deciding when to pull = back on the power, you could find yourself in a situtation (say a = mountain in your face - well, not likely in Florida, but you know {:>)) = where you could care less about 1 psi overboost verus getting over that = ridge line. I am surprised that anyone designing a EFI for a turbo would use that = method, but I guess they do on automobiles, but I wouldn't on an = aircraft. FWIW Ed Anderson ----- Original Message -----=20 From: sqpilot@earthlink=20 To: Rotary motors in aircraft=20 Sent: Wednesday, September 10, 2003 9:31 AM Subject: [FlyRotary] turbo wastegate requirements Hi, fellow canardians. I am still sitting on that fence between turbo = or not to turbo. (I have some splinters in my butt cheeks from that = fence). I was reading the installation and operation manual that came = with my MicroTech electronic engine management system, and under = "setting up" there is a section entitled BstCUT, which says "This = feature prevents turbo engines from overboosting by cutting all fuel = supply when bost pressure exceeds the limit set in theBSTcut screen, = i.e: if you set this value to 10 psi, all fuel supply will be = immediately shut off when boost is 11 psi or higher." Does this sound = like a useful tool in installing and setting up a turbo on my 13b? = Please don't flame me, as I know less about turbos than I know about = understanding women. Does this mean I would not need a wastegate? = Thanks in advance for your replies. Paul Conner, Mobile, AL ------=_NextPart_000_0017_01C377DB.68FA8EA0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

Hi Paul,

I have turbocharged = automobiles=20 (two of them) in my short life span, so I know a little bit about turbo, = but not=20 an expert by any means, however, I would not under any circumstance even = have=20 that device active in my airplane much less let it control fuel to a = engine=20 under boost. If it killed your ignition instead of your fuel it = still be a=20 bad idea (IMHO), but at least then you wouldn't risk damaging your = engine from=20 lean fuel induced detonation.

I for one don't want any computer or = other device=20 deciding when to pull back on the power, you could find yourself in a = situtation=20 (say a mountain in your face - well, not likely in Florida, but you know = {:>)) where you could care less about 1 psi overboost verus getting = over that=20 ridge line.

I am surprised that anyone designing a = EFI for a=20 turbo would use that method, but I guess they do on automobiles, but I = wouldn't=20 on an aircraft.

FWIW

Ed Anderson

----- Original Message -----
From:=20 sqpilot@earthlink
To: Rotary motors in = aircraft

Sent: Wednesday, September 10, = 2003 9:31=20 AM

Subject: [FlyRotary] turbo = wastegate=20 requirements

Hi, fellow canardians. I am = still sitting=20 on that fence between turbo or not to turbo. (I have some splinters in = my butt=20 cheeks from that fence). I was reading the installation = and=20 operation manual that came with my MicroTech electronic engine = management=20 system, and under "setting up" there is a section entitled = BstCUT, which=20 says "This feature prevents turbo engines from overboosting by cutting = all=20 fuel supply when bost pressure exceeds the limit set in theBSTcut = screen,=20 i.e: if you set this value to 10 psi, all fuel supply will be=20 immediately shut off when boost is 11 psi or higher." Does this = sound=20 like a useful tool in installing and setting up a turbo on my = 13b? =20 Please don't flame me, as I know less about turbos than I know about=20 understanding women. Does this mean I would not need a = wastegate? =20 Thanks in advance for your replies. Paul Conner, Mobile,=20 AL

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