X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.magma.ca ([206.191.0.250] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 934906 for flyrotary@lancaironline.net; Fri, 06 May 2005 13:44:17 -0400 Received-SPF: none receiver=logan.com; client-ip=206.191.0.250; envelope-from=ianddsl@magma.ca Received: from mail1.magma.ca (mail1.magma.ca [206.191.0.252]) by mx2.magma.ca (8.13.0/8.13.0) with ESMTP id j46HhU18002233 for ; Fri, 6 May 2005 13:43:31 -0400 Received: from binky (ottawa-hs-64-26-156-111.s-ip.magma.ca [64.26.156.111]) by mail1.magma.ca (8.13.0/8.13.0) with SMTP id j46HhSwD003256 for ; Fri, 6 May 2005 13:43:31 -0400 Reply-To: From: "Ian Dewhirst" To: "Rotary motors in aircraft" Subject: [FlyRotary] Re: Emailing: Possies & CAS 007, Possies & CAS 008, Possies & CAS 009 Date: Fri, 6 May 2005 13:43:25 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01F4_01C55241.93CFD3F0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_01F4_01C55241.93CFD3F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi Ed, has a crank trigger been discussed in the past? If so is anyone pursuing it? Do you know what the EC-2 needs to see, I assume that the EC-2 needs to see 3 pulses spaced 120 degrees apart on the crank, I am guessing that Tracy fires both rotors at the same time for simplicity as one would be starting the power cycle while the other was ending the exhaust cycle. I agree that the electronic components in the crank angle sensor are unlikely to fail, in my experience the problem is usually a failed connector or bad harness usually resulting from poor routing, past repairs in the vicinity, or old age causing the connectors to become brittle. -- Ian -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson Sent: Friday, May 06, 2005 1:09 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Emailing: Possies & CAS 007, Possies & CAS 008, Possies & CAS 009 Very Interesting approach, Georges. Simpler than trying to adapt the twin distributor 12A front mount. However, with both on the same shaft not certain you have true redundancy - in my opinion the shaft is more likely to fail than the simply electrical circuit used to sense the rotation. For true redundancy, I would think you would want to put a flywheel/pulley angle sensor - probably flywheel end where a flopping belt wouldn't tear it out. Ed ----- Original Message ----- From: Echo Lake Fishing Resort (Georges Boucher) To: Rotary motors in aircraft Sent: Friday, May 06, 2005 12:23 PM Subject: [FlyRotary] Emailing: Possies & CAS 007, Possies & CAS 008, Possies & CAS 009 Group I gave up on the 12a front cover to have igniter redundancy.The first photo is the semi completed unit (need to install upper shaft). Second is the adaptor & 3rd (out of focus)is the upper shaft with the center drilled out for the mounting bolt. The shaft has a ball bearing for support at the top (great support) the bearing retainer is left out as the upper shaft locates the bearing . A star washer between the two shaft will lock the two together.(note: machining accuracy is very important) The amount of space required shouldn't be a problem on any installation Georges B. Note: To protect against computer viruses, e-mail programs may prevent sending or receiving certain types of file attachments. Check your e-mail security settings to determine how attachments are handled. ---------------------------------------------------------------------------- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.5 - Release Date: 5/4/2005 ---------------------------------------------------------------------------- >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_01F4_01C55241.93CFD3F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Ed, has a crank trigger been = discussed in=20 the past?  If so is anyone pursuing it?  Do you know what the = EC-2=20 needs to see, I assume that the EC-2 needs to see 3 pulses = spaced 120=20 degrees apart on the crank, I am guessing that Tracy fires both rotors = at the=20 same time for simplicity as one would be starting the power cycle = while the=20 other was ending the exhaust cycle.
 
I agree that the electronic = components in=20 the crank angle sensor are unlikely to fail, in my experience the = problem is=20 usually a failed connector or bad harness usually resulting from poor = routing,=20 past repairs in the vicinity, or old age causing the connectors to = become=20 brittle.  -- Ian
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Ed=20 Anderson
Sent: Friday, May 06, 2005 1:09 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Emailing: = Possies &=20 CAS 007, Possies & CAS 008, Possies & CAS = 009

Very Interesting approach, Georges.
 
Simpler than trying to adapt the twin distributor = 12A front=20 mount.  However, with both on the same shaft not certain you have = true=20 redundancy - in my opinion the shaft is more likely to fail than the = simply=20 electrical circuit used to sense the rotation.  For true = redundancy, I=20 would think you would want to put a flywheel/pulley angle sensor - = probably=20 flywheel end where a flopping belt wouldn't tear it out.
 
Ed
 
----- Original Message -----
From:=20 Echo Lake Fishing Resort = (Georges=20 Boucher)
To: Rotary motors in = aircraft=20
Sent: Friday, May 06, 2005 = 12:23=20 PM
Subject: [FlyRotary] = Emailing: Possies=20 & CAS 007, Possies & CAS 008, Possies & CAS 009

Group
I gave up on the 12a front cover to have igniter = redundancy.The=20 first photo is the semi completed unit (need to install upper = shaft).=20 Second is the adaptor & 3rd (out of focus)is the upper = shaft with=20 the center drilled out for the mounting bolt. The shaft has a = ball=20 bearing for support at the top (great support) the bearing = retainer is=20 left out as the upper shaft locates the bearing . A star = washer=20 between the two shaft will lock the two together.(note: = machining=20 accuracy is very important)
The amount of space required shouldn't be a problem on = any=20 installation
Georges B.
 
Note: To protect against computer viruses, e-mail = programs may=20 prevent sending or receiving certain types of file = attachments. Check=20 your e-mail security settings to determine how attachments are = handled.

No virus found in this outgoing message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.308 / Virus Database: 266.11.5 - Release = Date:=20 5/4/2005

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html
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