X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao103.cox.net ([68.230.241.43] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4470133 for flyrotary@lancaironline.net; Fri, 17 Sep 2010 00:52:24 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao103.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100917045150.HBAM23084.fed1rmmtao103.cox.net@fed1rmimpo03.cox.net> for ; Fri, 17 Sep 2010 00:51:50 -0400 Received: from BigAl ([72.199.216.236]) by fed1rmimpo03.cox.net with bizsmtp id 7gro1f00856cS2o04grpwe; Fri, 17 Sep 2010 00:51:49 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=e4n1ZjYY/MidH6WTRS5qGD+cSaIt2UqZNViAts1RHs8= c=1 sm=1 a=lN8H/RjlhkCyIsyuOn2r7w==:17 a=q2yEpMBtpPTGeXezTkYA:9 a=sxw1ackKKIrG6xg_Zt0A:7 a=PqqNks6I-yDbDZ9PFeSwFVFVQRYA:4 a=CjuIK1q_8ugA:10 a=ICJm75ld6vO6-VAn:21 a=UFdKUdn8euaQuxBx:21 a=Few94s0DahWkMKttl58A:9 a=VFoYpgQNvCQgLUYbiDAA:7 a=PgRQ7YGzfUrBh8Cc-pWFgptZ_hgA:4 a=lN8H/RjlhkCyIsyuOn2r7w==:117 X-CM-Score: 0.00 Authentication-Results: cox.net; none From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Timing Date: Thu, 16 Sep 2010 21:51:54 -0800 Message-ID: <2C41F0B7092149009151452D8CE4CA6B@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01CB55E9.6178F8D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6863 Thread-Index: ActWCjUOjKo9UphnT4+aTrjAo2WTuwAISq4g In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 This is a multi-part message in MIME format. ------=_NextPart_000_000A_01CB55E9.6178F8D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Lynn: Is something missing; or do I not understand; see note below: =20 Remove all of the spark plugs. =20 Turn the engine in the direction of normal rotation until you can see an apex seal in the center of the trailing plug hole of the number one = rotor housing. The rotor housing furthest from the prop. The upper plug is the trailing plug. Removing the plug will reveal the hole.=20 =20 Mark a flywheel starter tooth under your temporary pointer. Use welding = wire or a coat hanger for a pointer, so you can bend it as needed. It needs = to be well mounted and snug. =20 Once you have marked the tooth under the pointer with a paint drop, or chalk, or scrap of tape, do not move the pointer any more. =20 turn the engine backwards about 30 degrees, looking into the leading = plug hole for the next apex seal to come to the center of the hole. The = leading plug hole is the one on the bottom of the number one rotor housing. Once = you have that apex seal centered make a second mark on a flywheel tooth or valley between teeth, whatever is under the pointer. =20 Half way between those two marks, make a third mark. This mark will be = the TDC mark, accurate to about a degree. Clean the tooth with a fine file = and paint it red. Count the teeth on the flexplate/flywheel. This puts the apex seal at TDC. What we want is the combustion chamber = at TDC. The center of the indent on the rotor face is 60 degrees from the = apex seal. Rotating the E-shaft 180 degrees puts the rotor face at TDC. =20 Let us say that you find 106 teeth. divide 360 by 106 and get 3.39 = degrees per tooth. So, for a timing mark at 24 degrees (for example) you would = count off 7 teeth while turning the engine backwards. Mark whatever is under = the pointer a different color than red. Make it bright like white or yellow. = You can move the red dot back under the pointer. Remove the wire pointer and make up a permanent pointer to point at the red mark. So long as the = engine is not turned during this process, all will be well. If you install more than one timing mark stamp what each is for on the spacer plate, with = the correct paint dot by each line.=20 =20 Use only a clip on inductive timing light. clipped onto the leading plug wire of the number one rotor housing.=20 =20 Lynn E. Hanover =20 ------=_NextPart_000_000A_01CB55E9.6178F8D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Lynn:=

Is something missing; or do I not understand; see note = below:

 

Remove all of the spark plugs.

 

Turn the engine in the direction of normal rotation until you can see an apex = seal in the center of the trailing plug hole of the number one rotor housing. The rotor housing furthest from the prop. The upper plug = is the trailing plug.

Removing the plug will reveal the hole.

 

Mark a flywheel starter tooth under your temporary pointer. Use welding wire or = a coat hanger for a pointer, so you can bend it as needed. It needs to be well = mounted and snug.

 

Once you have marked the tooth under the pointer with a paint drop, or chalk, = or scrap of tape, do not move the pointer any more.

 

turn the engine backwards about 30 degrees, looking into the leading = plug hole for the next apex seal to come to the center of the hole. The leading = plug hole is the one on the bottom of the number one rotor housing. Once you have = that apex seal centered make a second mark on a flywheel tooth or valley = between teeth, whatever is under the pointer.

 

Half way between those two marks, make a third mark. This mark will be the = TDC mark, accurate to about a degree. Clean the tooth with a fine file and paint = it red. Count the teeth on the flexplate/flywheel.

This puts the apex seal at = TDC.  What we want is the combustion chamber at TDC. The center of the indent = on the rotor face is 60 degrees from the apex seal.  Rotating the E-shaft = 180 degrees puts the rotor face at TDC.

 

Let us say that you find 106 teeth. divide 360 by 106 and get 3.39 degrees per = tooth. So, for a timing mark at 24 degrees (for example) you would count off 7 = teeth while turning the engine backwards. Mark whatever is under = the pointer a different color than red. Make it bright like white or yellow. You can = move the red dot back under the pointer. Remove the wire pointer and make up = a permanent pointer to point at the red mark. So long as the engine is not = turned during this process, all will be well. If you install more than one = timing mark stamp what each is for on the spacer plate, with the correct paint = dot by each line. 

 

Use only a clip on inductive timing light. clipped onto the leading plug = wire of the number one rotor housing. 

 

Lynn E. Hanover

 

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