X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 914041 for flyrotary@lancaironline.net; Mon, 25 Apr 2005 13:49:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050425174908.PCNY2434.imf24aec.mail.bellsouth.net@rd> for ; Mon, 25 Apr 2005 13:49:08 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Engine timing Date: Mon, 25 Apr 2005 12:49:16 -0500 Message-ID: <016f01c549bf$19f95900$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0170_01C54995.31235100" 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_0170_01C54995.31235100 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable The sensor should be lined up with the crank at 35 deg BTDC on #1 rotor. TDC is when the flywheel end counterweight is positioned at 9:00. =20 How do I determine if it is at 9:00 with rotor #1. Doesn't the flywheel = make 2 revs per one rotor rev? =20 =20 Hi Wendell, =20 For each revolution of the e-shaft, one face of each rotor fires. It therefore takes 3 revolutions to fire all three faces of each rotor. = For the purposes of timing, it makes no difference which face of rotor one = is at "TDC". =20 =20 Cheers, Rusty =20 =20 =20 ------=_NextPart_000_0170_01C54995.31235100 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
The sensor should be lined up with the crank at 35 deg BTDC on #1=20 rotor.  TDC is when the flywheel end counterweight is positioned at = 9:00. 
How do I=20 determine if it is at 9:00 with rotor #1. Doesn't the flywheel make 2 = revs per=20 one rotor rev?
 
 
=
Hi Wendell,
 
For each revolution of the e-shaft, one face = of each=20 rotor fires.  It therefore takes 3 revolutions to fire all three = faces of=20 each rotor.  For the purposes of timing, it makes no difference = which face=20 of rotor one is at "TDC".  
 
Cheers,
Rusty  =
 
 
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