Return-Path: Received: from mail23.syd.optusnet.com.au ([211.29.133.164] verified) by logan.com (CommuniGate Pro SMTP 5.0) with ESMTPS id 815196 for flyrotary@lancaironline.net; Fri, 04 Nov 2005 17:45:55 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.133.164; envelope-from=lendich@optusnet.com.au Received: from george (d58-105-149-249.dsl.nsw.optusnet.com.au [58.105.149.249]) by mail23.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id jA4Mj0s6027724 for ; Sat, 5 Nov 2005 09:45:04 +1100 Message-ID: <004701c5e191$66709950$f995693a@george> From: "george lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Timing Date: Sat, 5 Nov 2005 08:45:03 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0044_01C5E1E5.36DD4B80" 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_0044_01C5E1E5.36DD4B80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Joe/ Bobby, If I remember right, splitting the spark doesn't help until over 6,000 = RPM. Before that split or the same time - is the same. I believe that's why Tracy went with same timing as he was running with = a 2.17 ratio PSRU and was never running over 6,000 RPM anyway. If your running 2.85 Ratio PSRU and running at 7,000 + for=20 take-off isn't going to matter much anyway. From what I've read it's the = 8,000 and 9,000 RPM where the split timing is an advantage. However could be wrong! George ( down under) Joe, It can be set both ways. They can fire at the same time or you can = split firing the plugs and specify the time delay. Better fuel burn with = splitting the plugs according to Adkins but I am not sure what affect = this would have on SAG. I think I want mine firing together.=20 Bobby -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Joe Hull Sent: Friday, November 04, 2005 10:38 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Timing Are you firing both plugs (same rotor) at the same time or do you have = the leading and trailing split? Might not make any difference.=20 Bobby =20 The MicroTech is setup to manage a Rotary - so it has independent = firing parameters for leading and trailing plugs. =20 Joe Hull Redmond (Seattle), Washington Cozy MkIV #991 (working on Engine & Electrical & Finishing) http://www.maddyhome.com/canardpages/pages/JoeHull/index.html ------=_NextPart_000_0044_01C5E1E5.36DD4B80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Joe/ Bobby,
If I remember right, splitting the = spark doesn't=20 help until over 6,000 RPM. Before that split or the same time - is = the=20 same.
I believe that's why Tracy went with = same timing as=20 he was running with a 2.17 ratio PSRU and was never running over 6,000 = RPM=20 anyway.
If your running 2.85 Ratio PSRU and = running at=20 7,000 + for
take-off isn't going to matter much = anyway. From=20 what I've read it's the 8,000 and 9,000  RPM where the = split=20 timing is an advantage.
 
However could be wrong!
George ( down under)
 
 
Joe,
 
It can be set both ways. They can fire at the = same time=20 or you can split firing the plugs and specify the time delay. Better = fuel burn=20 with splitting the plugs according to Adkins but I am not sure what = affect=20 this would have on SAG. I think I want mine firing together.=20
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Joe=20 Hull
Sent: Friday, November 04, 2005 10:38 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re:=20 Timing

Are you = firing both=20 plugs (same rotor) at the same time or do you have the leading and = trailing=20 split? Might not make any difference.=20

Bobby

 

The MicroTech is setup to manage a Rotary =96 so it = has=20 independent firing parameters for leading and trailing=20 plugs.

 

Joe=20 Hull

Redmond=20 (Seattle), Washington

Cozy=20 MkIV #991 (working on Engine & Electrical &=20 Finishing)

http://www.maddyhome.com/canardpages/pages/JoeHull/index.html

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