X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 893824 for flyrotary@lancaironline.net; Fri, 23 Dec 2005 11:57:01 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-025-165.carolina.res.rr.com [24.74.25.165]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id jBNGuD4p015163 for ; Fri, 23 Dec 2005 11:56:13 -0500 (EST) Message-ID: <000d01c607e1$cdca96c0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Question for Tracy - was: Off Topic "Switch Placements" Date: Fri, 23 Dec 2005 11:56:22 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01C607B7.E48949D0" 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 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C607B7.E48949D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks for the info, Tracy. Until a decision is make on alternatives, = what might be good courses of action (in order to get to a place to = safely land)?? Full rich. Turn the secondary injectors off - intermittently turn them = all off if bogging. Full Lean. Intermittently turn on cold start or repeatedly punch = program button in 0 mode Wander around. Figure that on average it will be "just" right {:>). Ed A ----- Original Message -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 Sent: Friday, December 23, 2005 11:02 AM Subject: [FlyRotary] Re: Question for Tracy - was: Off Topic "Switch = Placements" Good question Perry. Answer would depend on the exact nature of the 'open' . Open at = ground end, hot end, or wiper. Answers in order: mixture goes full = rich, full lean, wanders around at last set point. The pot used is a = high rel part rated for 500,000 cycles but of course anything can fail. Most pot failures are 'dead spots' where the wiper goes open at a = certain spot (usually near where it is used the most). Mixture will = drift at this point and proper pilot response would be to move mixture = to a slightly richer setting, land, get the pot replaced before flying = again. Thanks for the mental nudge, I need to add this to the = instruction manual. I have pondered various fail safe strategies for this scenario (for = example, make the B controller fixed at midrange mixture) but so far = have not been satisfied with any of them. Anyone have other ideas to be = considered? Tracy ----- Original Message -----=20 From: Perry Casson=20 To: Rotary motors in aircraft=20 Sent: Thursday, December 22, 2005 4:50 PM Subject: [FlyRotary] Question for Tracy - was: Off Topic "Switch = Placements" This reminds me to ask a question to Tracy that wanders through my = brain=20 when there is no civilization in sight out the cockpit windows. Tracy: If the mixture pot fails (not all that uncommon to get an = open=20 failure in potentiometers) what does the EC2 firmware do to the = mixture? Perry Casson -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_000A_01C607B7.E48949D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Thanks for the info, Tracy. Until = a decision=20 is make on alternatives, what might be good courses of action (in order = to get=20 to a place to safely land)??

Full rich. Turn the secondary = injectors off -=20 intermittently turn them all off if bogging.

Full Lean. Intermittently turn on = cold start=20 or repeatedly punch program button in 0 mode

Wander around. Figure that on = average it will=20 be "just" right {:>).

Ed A

----- Original Message -----
From:=20 Tracy = Crook
To: Rotary motors in = aircraft

Sent: Friday, December 23, 2005 = 11:02=20 AM

Subject: [FlyRotary] Re: = Question for=20 Tracy - was: Off Topic "Switch Placements"

Good question Perry.

Answer would depend on the exact nature of the = 'open' . =20 Open at ground end, hot end, or wiper.   Answers in = order: =20 mixture goes full rich, full lean, wanders around at last set = point. The=20 pot used is a high rel part rated for 500,000 cycles but of course = anything=20 can fail.

Most pot failures are 'dead spots' where the wiper goes open = at a=20 certain spot (usually near where it is used the most). = Mixture will=20 drift at this point and proper pilot response would be to move = mixture to=20 a slightly richer setting, land, get the pot replaced before flying=20 again. Thanks for the mental nudge, I need to add this to the=20 instruction manual.

   I have pondered various fail safe strategies for = this=20 scenario (for example, make the B controller fixed at midrange = mixture) but so=20 far have not been satisfied with any of them. Anyone have other = ideas to=20 be considered?

Tracy

----- Original Message -----

From: Perry=20 Casson

To: Rotary motors in = aircraft=20

Sent: Thursday, December 22, = 2005 4:50=20 PM

Subject: [FlyRotary] Question = for Tracy=20 - was: Off Topic "Switch Placements"

This reminds me to ask a question to Tracy that = wanders=20 through my brain
when there is no civilization in sight out the = cockpit=20 windows.

Tracy: If the mixture pot fails (not all that = uncommon to=20 get an open
failure in potentiometers) what does the EC2 = firmware do to=20 the mixture?

Perry = Casson

--
Homepage: http://www.flyrotary.com/
Archi= ve=20 and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/

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