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Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.93.67.83] verified) by logan.com (CommuniGate Pro SMTP 4.1.1) with ESMTP id 2536223 for flyrotary@lancaironline.net; Thu, 21 Aug 2003 08:35:15 -0400 Received: from o7y6b5 (clt78-221.carolina.rr.com [24.93.78.221]) by ms-smtp-02.southeast.rr.com (8.12.5/8.12.2) with SMTP id h7LCVhCK024223 for ; Thu, 21 Aug 2003 08:31:44 -0400 (EDT) Message-ID: <004601c367e1$e13d4f60$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Safety: LED on EC2 and Power from injectors Date: Thu, 21 Aug 2003 08:43:53 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0043_01C367C0.59E0EAC0" 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_0043_01C367C0.59E0EAC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 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_0043_01C367C0.59E0EAC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

----- Original Message -----
From:=20 David=20 Leonard
To: Rotary motors in = aircraft

Sent: Thursday, August 21, 2003 = 3:03=20 AM

Subject: [FlyRotary] Safety: = LED on EC2=20 and Power from injectors

Thanks,=20 Tracy, that=92s = a big=20 relief. However, today I was thinking about that. It means = that if=20 you have your injectors and coils on the main bus like I do, then the=20 =93magnetos=94 are hot whenever the main bus is turned on. This = could in=20 theory lead to the engine firing if the prop is turned a little with = the main=20 buss on =96 like pushing the plane around at night with the lights on=20 etccc=85 Something to be careful of =96 although I really like = the=20 additional source of potential power.

David=20 Leonard

The Rotary=20 Roster:

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

David, If I recall my=20 conversation with Tracy correctly about the topic of inadvertent = starting of=20 the engine, I don't think you need to worry. Tracy has designed = a=20 minimum rpm value in the code necessary before the EC2 will = produce=20 the signal to trigger the ignition modules. If I recall = correctly this=20 is around 150 rpm and I believe that speed has to be maintained for at = least=20 two revolutions of the eccentric shaft. I may be incorrect on = the=20 details, but essential there is a safety feature. So, it would = seem=20 unlikely that pushing the plane around by the prop would trigger a = firing.=20 Tracy does a pretty thorough job of thinking out a = design.

Ed=20 Anderson

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