Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Tue, 25 Mar 2003 04:06:55 -0500 Message-ID: X-Original-Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1b1) with ESMTP id 2085250 for flyrotary@lancaironline.net; Mon, 24 Mar 2003 19:35:21 -0500 Received: from mail4.carolina.rr.com (fe4 [24.93.67.51]) by ms-smtp-01.southeast.rr.com (8.12.5/8.12.2) with ESMTP id h2P0VJgA019479 for ; Mon, 24 Mar 2003 19:31:19 -0500 (EST) Received: from o7y6b5 ([24.93.78.62]) by mail4.carolina.rr.com with Microsoft SMTPSVC(5.5.1877.757.75); Mon, 24 Mar 2003 19:36:58 -0500 X-Original-Message-ID: <000001c2f267$658714e0$1702a8c0@WorkGroup> From: "Ed Anderson" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Spark Plugs X-Original-Date: Mon, 24 Mar 2003 19:39:40 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0040_01C2F23D.1C698740" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0040_01C2F23D.1C698740 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 Sent: Monday, March 24, 2003 6:17 PM Subject: [FlyRotary] Re: Spark Plugs Ian, was amazed to see you are using conventional plugs in your rotary. = Didn't even know they would fit without the ground electrode hitting the = bottom of the plug recess. Did you always use these? What was your experience with the rotary = specific plugs (BUR-7/9 EQ) if not? Tracy Tracy, there are a few "Standard" spark plugs which while their base = is 3/4" long, their electrodes will not clip/chip the apex seal. = However, that is by no means true of many/most "Standard" spark plugs. = Unless someone is abolutely certain that a spark plug electrode will not = stick out into the combustion chamber, they are running a very high = probablity of chipping an apex seal meaning a teardown and replacement. = So they shouldn't just stick in a plug to see how it works, it may cause = tears and and require $$. =20 Also, I tried some of the single electrode plugs that Paul Yaw had = found would not clip the apex seal and found they did not live in my = rotary engine. Mine looked like Ian's after about 10 hours.. I did some research and decided that while I would like to find a = plug like the BUR-7/9EQ without the built-in Resistor, I have not been = able to locate any at this time. Speaking of spark plugs, while out flying yesterday and putting the = third hour on the RD-1B, I had a couple of episodes of the infamous = spark plug "SAG". This set of plugs went a bit longer before showing = the symptom perhaps due to my replacement of the old spark plug wires. = So will be sticking in a new set of plugs for the trip. Weather is looking OK for Saturday at this point, So put the beer on = ice. Ed Anderson ------=_NextPart_000_0040_01C2F23D.1C698740 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

----- Original Message -----
From:=20 Tracy = Crook
To: Rotary motors in = aircraft

Sent: Monday, March 24, 2003 = 6:17=20 PM

Subject: [FlyRotary] Re: Spark=20 Plugs

Ian,

was amazed to see you are using = conventional plugs in your rotary. Didn't even know they would = fit=20 without the ground electrode hitting the bottom of the plug=20 recess.

Did you always use these? What = was your=20 experience with the rotary specific plugs (BUR-7/9 EQ) if = not?

Tracy

Tracy, there are a few = "Standard"=20 spark plugs which while their base is 3/4" long, their electrodes will = not=20 clip/chip the apex seal. However, that is by no means true of = many/most=20 "Standard" spark plugs. Unless someone is abolutely certain = that a=20 spark plug electrode will not stick out into the = combustion chamber,=20 they are running a very high probablity of chipping an apex = seal meaning=20 a teardown and replacement. So they shouldn't just stick in = a plug=20 to see how it works, it may cause tears and and require $$. =20

Also, I tried some of the single = electrode plugs=20 that Paul Yaw had found would not clip the apex seal and found = they did=20 not live in my rotary engine. Mine looked like Ian's = after=20 about 10 hours..

I did some research and decided = that while=20 I would like to find a plug like the BUR-7/9EQ without the built-in = Resistor,=20 I have not been able to locate any at this time.

Speaking of spark plugs, while out = flying=20 yesterday and putting the third hour on the RD-1B, I had a couple of = episodes=20 of the infamous spark plug "SAG". This set of plugs went a bit = longer=20 before showing the symptom perhaps due to my replacement of the old = spark plug=20 wires. So will be sticking in a new set of plugs for the=20 trip.

Weather is looking OK for Saturday at = this=20 point, So put the beer on ice.

Ed Anderson=20

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