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X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf18aec.mail.bellsouth.net ([205.152.59.66] verified) by logan.com (CommuniGate Pro SMTP 5.0c6) with ESMTP id 782037 for flyrotary@lancaironline.net; Mon, 24 Oct 2005 15:07:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.66; envelope-from=13brv3@bellsouth.net Received: from ibm61aec.bellsouth.net ([65.6.194.9]) by imf18aec.mail.bellsouth.net with ESMTP id <20051024190715.KTYL26555.imf18aec.mail.bellsouth.net@ibm61aec.bellsouth.net> for ; Mon, 24 Oct 2005 15:07:15 -0400 Received: from rd ([65.6.194.9]) by ibm61aec.bellsouth.net with ESMTP id <20051024190714.APL463.ibm61aec.bellsouth.net@rd> for ; Mon, 24 Oct 2005 15:07:14 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: It's a Start! Date: Mon, 24 Oct 2005 14:07:15 -0500 Message-ID: <000001c5d8ce$25dc62f0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C5D8A4.3D065AF0" 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 V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C5D8A4.3D065AF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Congrats on the run Joe. =20 =20 As for the preferred number of injectors, I could make as much of a case = for 2 as 4. When you consider that leaking, or sticking open is one of the = more common failure modes, more isn't necessarily merrier. It also doubles = the number of high pressure fuel seals that would like to burn your airplane = up if you give them half a chance. =20 In Tracy's system, the staged injectors can be used to eliminate a = faulty injector, and run on just two. If the bad injector is stuck closed, or = just being erratic, that's great, but if it's stuck open, it won't help as = much. It may still help, if you actually use the stuck open injector, and run = at high power. All in all, I really like that feature of Tracy's EC-2, and = I have always run injectors in pairs. =20 =20 Now, as for adding more injectors with the MicroTech, will this still = work? I know you can set it up for staged injectors, but can you (easily, in flight, during an emergency) tell it to disable a pair and make it up = with the others? Maybe you can. I don't know. I've always heard that the MicroTech was a nice unit, but it's a car ECU, and I'm guessing it isn't designed with backup features built in. =20 =20 Cheers, Rusty (hoping the S FL boys are OK) =20 =20 =20 =20 =20 =20 =20 ------=_NextPart_000_0001_01C5D8A4.3D065AF0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Congrats on=20 the run Joe.

As for the=20 preferred number of injectors, I could make as much of a case for 2 as = 4. =20 When you consider that leaking, or sticking open is one of the more = common=20 failure modes, more isn't necessarily merrier. It also = doubles the=20 number of high pressure fuel seals that would like to burn your = airplane up=20 if you give them half a chance.

In Tracy's=20 system, the staged injectors can be used to eliminate a faulty injector, = and run=20 on just two. If the bad injector is stuck closed, or just being = erratic,=20 that's great, but if it's stuck open, it won't help as much. It = may still=20 help, if you actually use the stuck open injector, and run at high = power. =20 All in all, I really like that feature of Tracy's EC-2, and I have = always run=20 injectors in pairs.

Now, as for=20 adding more injectors with the MicroTech, will this still work? I = know you=20 can set it up for staged injectors, but can you (easily, in flight, = during an=20 emergency) tell it to disable a pair and make it up with the = others? =20 Maybe you can. I don't know. I've always heard that the = MicroTech was a nice unit, but it's a car ECU, and I'm guessing it = isn't=20 designed with backup features built in.

Cheers,

Rusty (hoping=20 the S FL boys are OK)

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