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 5.3c2) with ESMTP id 3986495 for flyrotary@lancaironline.net; Mon, 23 Nov 2009 10:30:13 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao103.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20091123152938.KRPO11920.fed1rmmtao103.cox.net@fed1rmimpo01.cox.net> for ; Mon, 23 Nov 2009 10:29:38 -0500 Received: from BigAl ([72.192.141.69]) by fed1rmimpo01.cox.net with bizsmtp id 8fVe1d00C1W2PoQ03fVefV; Mon, 23 Nov 2009 10:29:38 -0500 X-VR-Score: -30.00 X-Authority-Analysis: v=1.1 cv=AS0zFIteR8LYVjh5AkCbLYXQAS502WIjzOravdKEodU= c=1 sm=1 a=X4y9SBka+FAc+vv68blzUg==:17 a=v-5UQQWxPQsav4-b44sA:9 a=E47XffT6S_Mmzu0qJNMlcmkt2sIA:4 a=3xSDry8RgVLNh2momCkA:9 a=4zodQm2shdT48pVLTjMA:7 a=Nm-n4sPRywoDEdG0wy6oMaiE6HEA:4 a=X4y9SBka+FAc+vv68blzUg==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: No start Date: Mon, 23 Nov 2009 07:29:53 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01CA6C0E.BF9D75F0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal Thread-Index: Acpr1FP/+t+Xgdc+Tjad76Zm1PbFZAAeBoUg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_000A_01CA6C0E.BF9D75F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 Steve,=20 I read your other post on what you discovered regarding your bad ground. = I wonder how many of us have our engine grounds tied to a bolt near the = front cover or end housing? (Mine does...) Mark S. =20 Mine does as well - bolts to the front cover. I have never had a = starting issue, but I have followed this discussion with interest because a = couple of years ago I did a starting spark check and found the sparks considerably weaker than the mode 8 (or whatever) check. I just assumed it was due = to the voltage drawdown when the starter was running. Now it's worth = another look. =20 I recall giving it some thought when doing the wiring (My EC/EM manuals apparently predated Tracy recommended wiring diagram). I concluded that = the various things bolted to the engine, like the manifolds, would provide = good conduction paths regardless of the sealing between layers - and the 20B = has a couple more layers. Both my intake and exhaust flanges are continuous = and connect all the layers, and there are other things making the connection = to the front cover, so this would be less of an issue compared to an installation having separate flanges to each housing. =20 Anyway, Steve; I'm glad you found the problem. And thanks; it's a help = to the rotary community, and again proves the value of a list such as this. =20 Al G =20 =20 ------=_NextPart_000_000A_01CA6C0E.BF9D75F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Steve,

I read your other post on what you discovered regarding your bad ground. I wonder how many of us have our engine grounds tied to a bolt near the front cover or end housing? = (Mine does...)

Mark S.

Mine does as well – bolts = to the front cover. I have never had a starting issue, but I have = followed this discussion with interest because a couple of years ago I did a starting = spark check and found the sparks considerably weaker than the mode 8 (or = whatever) check. I just assumed it was due to the voltage drawdown when the = starter was running. Now it’s worth another look.

I recall giving it some thought = when doing the wiring (My EC/EM manuals apparently predated = Tracy recommended = wiring diagram). I concluded that the various things bolted to the = engine, like the manifolds, would provide good conduction paths regardless of the = sealing between layers – and the 20B has a couple more layers. Both = my intake and exhaust flanges are continuous and connect all the layers, = and there are other things making the connection to the front cover, so this would = be less of an issue compared to an installation having separate flanges to = each housing.

Anyway, Steve; I’m glad you = found the problem. And thanks; it’s a help to the rotary = community, and again proves the value of a list such as this.

Al G

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