X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.248] (HELO qnsi-xch.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1180341 for flyrotary@lancaironline.net; Fri, 16 Jun 2006 09:29:12 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.248; envelope-from=bhughes@qnsi.net Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C69149.23836D76" Disposition-Notification-To: "Bobby J. Hughes" X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Subject: RE: [FlyRotary] Re: Renesis Crank Angle Sensor Date: Fri, 16 Jun 2006 08:31:13 -0500 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Renesis Crank Angle Sensor Thread-Index: AcaRA4XHQiKZge7WSDKXHyEqcaIygAARWk4g From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C69149.23836D76 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bill, =20 I was thinking the same thing about the pulley but only the alternator. = I had two alternator pulleys made to almost match the main pulley size. = They cost me $125 each but should prolong the life of the alternators. =20 Bobby ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On = Behalf Of WRJJRS@aol.com Sent: Friday, June 16, 2006 12:09 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Renesis Crank Angle Sensor In a message dated 6/15/2006 6:24:03 AM Pacific Standard Time, = Lehanover@aol.com writes: =09 Lynn, =20 A toothed belt makes sense. I was thinking ribbed or V. =20 Bobby Bobby, =20 Lynn mentioned this once but it bears repeating, the crank angle sensor = is just that. You must be sure that the angle of the toothed wheel and = the e-shaft remain in proper timing! Even a very small variance is bad. = Your tolerance would have to stay at +- .5 degrees max. That isn't = possible with anything but a toothed belt or direct attachment. (which = is much better) I had a brain wave one time and thought if people are = getting undersized pulleys made, why not raise a flange on both sides = and cut the tooth pattern in it? This would be very reliable and would = allow 2 pickups for redundancy. The patterns could be cut at the same = angle or 180=B0 or whatever angle allowed the easiest mounting of a = second pickup. Bill Jepson ------_=_NextPart_001_01C69149.23836D76 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Bill,

I was = thinking the same=20 thing about the pulley but only the alternator. I had two alternator = pulleys=20 made to almost match the main pulley size. They cost me $125 each = but=20 should prolong the life of the alternators.

Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of=20 WRJJRS@aol.com
Sent: Friday, June 16, 2006 12:09 = AM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re: Renesis = Crank Angle=20 Sensor

In a message dated 6/15/2006 6:24:03 AM Pacific Standard Time,=20 Lehanover@aol.com writes:

Lynn,

A toothed = belt makes=20 sense. I was thinking ribbed or V.

Bobby

<= /DIV>

Bobby,

Lynn mentioned this once but it bears repeating, the crank angle = sensor is=20 just that. You must be sure that the angle of the toothed wheel and the = e-shaft=20 remain in proper timing! Even a very small variance is bad. Your = tolerance would=20 have to stay at +- .5 degrees max. That isn't possible with anything but = a=20 toothed belt or direct attachment. (which is much better) I had a brain = wave one=20 time and thought if people are getting undersized pulleys made, why not = raise a=20 flange on both sides and cut the tooth pattern in it? This would be very = reliable and would allow 2 pickups for redundancy. The patterns could be = cut at=20 the same angle or 180=B0 or whatever angle allowed the easiest mounting = of a=20 second pickup.

Bill Jepson

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