Return-Path: Received: from fed1mtao08.cox.net ([68.6.19.123] verified) by logan.com (CommuniGate Pro SMTP 4.1.1) with ESMTP id 2536369 for flyrotary@lancaironline.net; Thu, 21 Aug 2003 10:43:57 -0400 Received: from Leonards ([68.111.228.182]) by fed1mtao08.cox.net (InterMail vM.5.01.06.04 201-253-122-130-104-20030726) with ESMTP id <20030821144350.LRMS28174.fed1mtao08.cox.net@Leonards> for ; Thu, 21 Aug 2003 10:43:50 -0400 From: "David Leonard" To: "'Rotary motors in aircraft'" Subject: Re: Safety: LED on EC2 and Power from injectors Date: Thu, 21 Aug 2003 07:44:01 -0700 Message-ID: <000901c367f2$a90db420$b6e46f44@Leonards> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01C367B7.FCAEDC20" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C367B7.FCAEDC20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Wow, Tracy does seem to think of everything..eh. except hand propping :-) David Leonard The Rotary Roster: http://members.aol.com/_ht_a/rotaryroster/index.html ----- Original Message ----- From: David Leonard To: Rotary motors in aircraft Sent: Thursday, August 21, 2003 3:03 AM Subject: [FlyRotary] Safety: LED on EC2 and Power from injectors Thanks, Tracy, that's a big relief. However, today I was thinking about that. It means that if you have your injectors and coils on the main bus like I do, then the "magnetos" are hot whenever the main bus is turned on. This could in theory lead to the engine firing if the prop is turned a little with the main buss on - like pushing the plane around at night with the lights on etccc. Something to be careful of - although I really like the additional source of potential power. David Leonard The Rotary Roster: http://members.aol.com/_ht_a/rotaryroster/index.html David, If I recall my conversation with Tracy correctly about the topic of inadvertent starting of the engine, I don't think you need to worry. Tracy has designed a minimum rpm value in the code necessary before the EC2 will produce the signal to trigger the ignition modules. If I recall correctly this is around 150 rpm and I believe that speed has to be maintained for at least two revolutions of the eccentric shaft. I may be incorrect on the details, but essential there is a safety feature. So, it would seem unlikely that pushing the plane around by the prop would trigger a firing. Tracy does a pretty thorough job of thinking out a design. Ed Anderson ------=_NextPart_000_000A_01C367B7.FCAEDC20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Wow, Tracy does seem to = think of everything….eh…  except hand propping  = J

 

David Leonard

The Rotary = Roster:

http://memb= ers.aol.com/_ht_a/rotaryroster/index.html

----- Original Message -----

Sent: = Thursday, August 21, 2003 3:03 AM

Subject: = [FlyRotary] Safety: LED on EC2 and Power from injectors

 

Thanks, Tracy, that’s a = big relief.  However, today I was thinking about that.  It means = that if you have your injectors and coils on the main bus like I do, then the “magnetos” are hot whenever the main bus is turned on.  = This could in theory lead to the engine firing if the prop is turned a little = with the main buss on – like pushing the plane around at night with the = lights on etccc…  Something to be careful of – although I = really like the additional source of potential power.

 

David Leonard

The Rotary = Roster:

http://memb= ers.aol.com/_ht_a/rotaryroster/index.html

 

 

David, If I recall my conversation with = Tracy correctly about the topic of inadvertent starting of the engine, I don't think you = need to worry.  Tracy has designed a minimum rpm value in the code  necessary before the EC2 will produce = the signal to trigger the ignition modules.  If I recall correctly this = is around 150 rpm and I believe that speed has to be maintained for at = least two revolutions of the eccentric shaft.  I may be incorrect on the = details, but essential there is a safety feature.  So, it would seem = unlikely that pushing the plane around by the prop would trigger a firing. Tracy does a pretty thorough job of thinking out a design.

 

Ed Anderson

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