X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from madison.lisco.com ([69.18.32.36] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6009456 for flyrotary@lancaironline.net; Sat, 12 Jan 2013 21:37:30 -0500 Received-SPF: none receiver=logan.com; client-ip=69.18.32.36; envelope-from=rob@mum.edu Received: from robertsdellxp (76-76-234-12.lisco.net [76.76.234.12]) by madison.lisco.com (Postfix) with SMTP id 2BE1B267A2D for ; Sat, 12 Jan 2013 20:36:56 -0600 (CST) Message-ID: From: "Rob" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Hiccup Date: Sat, 12 Jan 2013 20:36:55 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0036_01CDF104.8F5EF2A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 This is a multi-part message in MIME format. ------=_NextPart_000_0036_01CDF104.8F5EF2A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bill,=20 What ever you use for new ignition wires, check their continuity before = you install them. I got a new set of MSD's inductive core wires = (expensive) that had a bad wire right out of the box. Robert ----- Original Message -----=20 From: John Slade=20 To: Rotary motors in aircraft=20 Sent: Saturday, January 12, 2013 6:31 PM Subject: [FlyRotary] Re: Hiccup I'd recommend paying the $85. My magnacore custom made plug leads = haven't given me a problem in 8 years. Any way you can eliminate one possible cause is worth it. One nice = thing about Magnacore is that they will make them to specified length = with pre-installed connectors. I got mine in 2 colors. Red for leading, = Black for trailing. On 1/12/2013 3:18 PM, Bill Bradburry wrote: The Magnacore wires are fairly pricey, about $85 for the RX-8. Not = that I am cheap or anything, but does anyone have a more economical = source?? Bill B=20 -------------------------------------------------------------------------= --- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Steven W. Boese Sent: Saturday, January 12, 2013 1:30 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Hiccup I had an aftermarket tachometer on my engine test stand that would = often read twice the actual rpm. The engine stand was set up so that = the power to each of the four ignition coils could be controlled = independently. The spark plug wires were Mazda OEM. The behavior of = the tach would sometimes be affected by the combination of ignition = coils that were active. In the course of troubleshooting, it was found = that the tach would consistently read twice the actual RPM when its = input wire was completely disconnected at the tach. It was concluded = that the tach was responding to signals emitted by the spark plug wires = and the doubled rpm indication was due to triggering by the ignition = signals from both rotors. Replacing the Mazda spark plug wires with = Magnecore wires from the installation in my plane cured the tach errors. = Now, however, checking the ignition timing with an inductive timing = light pickup on these wires was difficult whereas it was not a problem = with the original wires. It should be noted that the EC2 on the engine stand never gave any = indication of having problems when either set of spark plug wires was = installed in spite of being physically located closer to the coils and = spark plug wires relative to the tach. Steve Boese RV6A, 1986 13B NA, RD1A, EC2 =20 -------------------------------------------------------------------------= --- From: Rotary motors in aircraft [flyrotary@lancaironline.net] on = behalf of Dale_R [dale.rog@gmail.com] Sent: Saturday, January 12, 2013 8:04 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Hiccup Dunno how many people here remember when spark wire was just that: = wire. But it was electrically noisy. So it got replaced by carbon = impregnated fabric, which has rather high resistance (a cheap way to = damp the "noise"). Another way to suppress the "noise" is to wrap the wire (many turns, = closely spaced) around an insulating core, which creates an inductive = impedance, which accomplishes the same goal but readily passes spark = current. AFAIK, "MAGNECORE" was the first to explore this method, but = several companies offer a similar product now. According to some = sources, the core material can make a large difference in the inductive = effectiveness. Therefore, I'd recommend=20 MAGNECORE. =20 -- Best Regards,Dale_R (who has no financial interest in Magnecore)Cozy = MKIV #497 On 1/12/2013 7:21 AM, Bill Bradburry wrote: Anybody have a recommendation for ignition wires for the Renesis? = I have the original Mazda wires. I checked them out yesterday and they = seemed fine, but I am still considering replacing them to see if it = helps. Bill B ------=_NextPart_000_0036_01CDF104.8F5EF2A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bill,
What ever you use for new ignition = wires, check=20 their continuity before you install them. I got a new set of MSD's = inductive=20 core wires (expensive) that had a bad wire right out of the = box.
Robert
----- Original Message -----
From:=20 John Slade
Sent: Saturday, January 12, = 2013 6:31=20 PM
Subject: [FlyRotary] Re: = Hiccup

I'd recommend paying the $85.  My = magnacore=20 custom made plug leads haven't given me a problem in 8 years.
Any = way you=20 can eliminate one possible cause is worth it. One nice thing about = Magnacore=20 is that they will make them to specified length with pre-installed = connectors.=20 I got mine in 2 colors. Red for leading, Black for trailing.

On = 1/12/2013 3:18 PM, Bill Bradburry wrote:

The = Magnacore wires=20 are fairly pricey, about $85 for the RX-8.  Not that I am cheap = or=20 anything, but does anyone have a more economical=20 source??

Bill B=20

From:=20 Rotary motors in = aircraft [mailto:flyrotary@lancaironlin= e.net]=20 On Behalf Of Steven = W.=20 Boese
Sent: = Saturday,=20 January 12, 2013 1:30 PM
To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re:=20 Hiccup

I had = an=20 aftermarket tachometer on my engine test stand that would often read = twice=20 the actual rpm.  The engine stand was set up so that the power = to each=20 of the four ignition coils could be controlled independently.  = The=20 spark plug wires were Mazda OEM.  The behavior of the tach = would=20 sometimes be affected by the combination of ignition coils that were = active.  In the course of troubleshooting, it was found that=20 the tach would consistently read twice the actual RPM when its = input=20 wire was completely disconnected at the tach.  It was concluded = that=20 the tach was responding to signals emitted by the spark plug = wires and=20 the doubled rpm indication was due to triggering by the = ignition=20 signals from both rotors.  Replacing the Mazda spark plug wires = with Magnecore wires from the installation in my plane cured=20 the tach errors.  Now, however, checking the ignition = timing=20 with an inductive timing light pickup on these wires was = difficult=20 whereas it was not a problem with the original=20 wires.

It = should be=20 noted that the EC2 on the engine stand never gave any = indication=20 of having problems when either set of spark plug wires was = installed in=20 spite of being physically located closer to the coils and spark plug = wires relative to the tach.

Steve=20 Boese

RV6A,=20 1986 13B NA, RD1A, = EC2

 =20

From: = Rotary motors in aircraft [flyrotary@lancaironline.net]=20 on behalf of Dale_R [dale.rog@gmail.com]
Sent: Saturday, January 12, = 2013 8:04=20 AM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re:=20 Hiccup

Dunno how many people here = remember=20 when spark wire was just that: wire.  But it was electrically=20 noisy.  So it got replaced by carbon impregnated fabric, which = has=20 rather high resistance (a cheap way to damp the = "noise").

Another way=20 to suppress the "noise" is to wrap the wire (many turns, closely = spaced)=20 around an insulating core, which creates an inductive impedance, = which=20 accomplishes the same goal but readily passes spark current.  = AFAIK,=20 "MAGNECORE" was the first to explore this method, but several = companies=20 offer a similar product now.  According to some sources, the = core=20 material can make a large difference in the inductive = effectiveness. =20 Therefore, I'd recommend=20 =
MAGNECORE.
 

-- 
Best Regards,
Dale_R (who has no financial interest in =
Magnecore)
Cozy MKIV #497




On 1/12/2013 = 7:21 AM,=20 Bill Bradburry=20 wrote:

Anybody = have a=20 recommendation for ignition wires for the Renesis?  I have = the=20 original Mazda wires.  I checked them out yesterday and they = seemed=20 fine, but I am still considering replacing them to see if it=20 helps.

Bill=20 B


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