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X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 934865 for flyrotary@lancaironline.net; Fri, 06 May 2005 13:34:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=sqpilot@bellsouth.net Received: from paul ([209.214.45.109]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with SMTP id <20050506173349.OCBD2061.imf19aec.mail.bellsouth.net@paul> for ; Fri, 6 May 2005 13:33:49 -0400 Message-ID: <001601c552e7$e9687ff0$6d2dd6d1@paul> From: To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Static MAP readings? Date: Sat, 7 May 2005 04:34:03 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C552BD.FF2CCD70" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C552BD.FF2CCD70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Friday, May 06, 2005 7:50 AM Subject: [FlyRotary] Re: Static MAP readings? Not quite correct, Rusty. My 2900 is a DCOE type (Throats are closer = together - like 90 mm center to center whereas the IDF type are more = like 120mm) and has the 4 injectors. =20 Perhaps they have discontinued the 4 injector DCOE type. Hi Ed, When I ordered the 4 injector TB that I have, I wanted one with the = same bolt pattern as the one I had (DCOE). I can't recall the details, = but for some seemingly good reason, I had to get a different style. =20 On the TWM site, they still list a 2900-5004/L, which is a 50 mm 4 = injector TB. Perhaps they still are available. If so, it would bolt = right on to the manifold that Paul has. The only thing to watch for is = the left vs right hand differences. He'd have to figure out which one = he has now, and verify that the linkage would work out with the new one. = He's also have to cough up $410 for the TB, and another $200 for = injectors. =20 Paul, on the MicroTech, can you turn off one set of injectors on the = fly, like you can with Tracy's EC-2? If not, what does having 4 = injectors buy you as far as redundancy? In other words, why do you want = 4 injectors? Cheers, Rusty =20 Perhaps I don't understand the way the injector firing works. I know = that some people had two injectors in their fuel rail (primaries) and = used the two in the housing as their secondaries. I was thinking that I = could use two injectors as primaries and the other two as secondaries. I = believe the secondaries kick in above a certain throttle setting? If = set up like that, wouldn't all 4 injectors be working at cruise throttle = settings? If so, if one injector failed, there would still be one = injector spraying fuel into one of the rotor housings, and two spraying = fuel into the other rotor housing, giving me some kind of redundancy. = With my present system (two injectors only), if one fails, that rotor = will get no fuel at all. The MicroTech ECU does have provisons for what = they refer to as staged injectors. Still learning. Paul Conner ------=_NextPart_000_0011_01C552BD.FF2CCD70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

----- Original Message -----
From:=20 Russell=20 Duffy
To: Rotary motors in = aircraft

Sent: Friday, May 06, 2005 7:50 = AM

Subject: [FlyRotary] Re: Static = MAP=20 readings?

Not = quite correct,=20 Rusty. My 2900 is a DCOE type (Throats are closer together - = like 90 mm=20 center to center whereas the IDF type are more like 120mm) and has the = 4=20 injectors.

Perhaps they have discontinued the 4 = injector=20 DCOE type.

Hi=20 Ed,

When I=20 ordered the 4 injector TB that I have, I wanted one with the same = bolt=20 pattern as the one I had (DCOE). I can't recall the details,=20 but for some seemingly good reason, I had to get a different = style. =20

On the TWM=20 site, they still list a 2900-5004/L, which is a 50 mm 4 injector=20 TB. Perhaps they still are available. If so, it would bolt = right=20 on to the manifold that Paul has. The only thing to watch for is the = left vs=20 right hand differences. He'd have to figure out which one = he has=20 now, and verify that the linkage would work out with the new = one. =20 He's also have to cough up $410 for the TB, and another $200 for=20 injectors.

Paul, on=20 the MicroTech, can you turn off one set of injectors on the fly, like = you can=20 with Tracy's EC-2? If not, what does having 4 injectors buy = you as=20 far as redundancy? In other words, why do you want 4=20 injectors?

Cheers,

Rusty

Perhaps I=20 don't understand the way the injector firing works. I know that = some=20 people had two injectors in their fuel rail (primaries) and used the = two in=20 the housing as their secondaries. I was thinking that I could = use two=20 injectors as primaries and the other two as secondaries. I believe the = secondaries kick in above a certain throttle setting? If set up = like=20 that, wouldn't all 4 injectors be working at cruise throttle = settings? =20 If so, if one injector failed, there would still be one injector = spraying fuel=20 into one of the rotor housings, and two spraying fuel into the other = rotor=20 housing, giving me some kind of redundancy. With my present = system (two=20 injectors only), if one fails, that rotor will get no fuel at = all. The=20 MicroTech ECU does have provisons for what they refer to as staged=20 injectors. Still learning. Paul Conner

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