X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rg4.comporium.net ([208.104.2.24] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTPS id 2643437 for flyrotary@lancaironline.net; Sun, 13 Jan 2008 12:54:40 -0500 Received-SPF: pass receiver=logan.com; client-ip=208.104.2.24; envelope-from=Jewen@comporium.net Received: from 208-104-81-95.lnhe.2wcm.comporium.net (HELO engineer1) ([208.104.81.95]) by rg4.comporium.net (MOS 3.8.4-GA FastPath queued) with SMTP id AJM60537; Sun, 13 Jan 2008 12:53:59 -0500 (EST) Message-ID: <010801c8560d$025752e0$6505a8c0@cooleygroup.local> From: "Joe Ewen" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: EC2 Date: Sun, 13 Jan 2008 12:50:20 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0100_01C855E2.DB3C9690" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 X-Junkmail-Status: score=10/70, host=rg4.comporium.net X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A010208.478A5037.0113,ss=1,fgs=0, ip=208.104.81.95, so=2007-03-13 10:31:19, dmn=5.4.3/2007-11-16 This is a multi-part message in MIME format. ------=_NextPart_000_0100_01C855E2.DB3C9690 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Bob, Tracy will have to weigh in on this, but here is what I see. When the = EC2 (20B version) was using the electromechanical relay: when the signal = from the controller was off, the relay would conduct to the secondaries = because it was wired to the NC (normally closed) contacts. The MOSFET = SSR (solid state relay) is considered to be NO (normally open), so = without energizing the relay it will not conduct to the secondaries. = Unless I am missing something, Tracy will have had to change the logic = in his program to reverse the state of the signal line so it would = function properly with the SSR rather than the electromechanical relay. = If I have this correct that means that one can not switch from one relay = type to the other without have the program updated. In all EC2 matters, = Tracy is of course the final authority. =20 That said, the relay would only effect the secondaries and you should = still have all primaries firing. Joe ----- Original Message -----=20 From: BMears9413@aol.com=20 To: Rotary motors in aircraft=20 Sent: Sunday, January 13, 2008 12:18 PM Subject: [FlyRotary] Re: EC2 My setup came with the little mechanical relay...Bob White changed it = to the electronic relay system. So I guess Im not sure exactly what I = have now. Bob Mears Supermarine Spitfire -------------------------------------------------------------------------= ----- Start the year off right. Easy ways to stay in shape in the new year. ------=_NextPart_000_0100_01C855E2.DB3C9690 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Bob,
 
Tracy will have to weigh in on this, but here is what I see.  = When the=20 EC2 (20B version) was using the electromechanical relay: when the = signal=20 from the controller was off, the relay would conduct to the secondaries = because=20 it was wired to the NC (normally closed) contacts.  The MOSFET SSR = (solid=20 state relay) is considered to be NO (normally open), so without = energizing the=20 relay it will not conduct to the secondaries.  Unless I am missing=20 something, Tracy will have had to change the logic in his program to = reverse the=20 state of the signal line so it would function properly with the SSR = rather than=20 the electromechanical relay.  If I have this correct that means = that one=20 can not switch from one relay type to the other without have the program = updated.  In all EC2 matters, Tracy is of course the final = authority. =20
 
That said, the relay would only effect the secondaries and you = should still=20 have all primaries firing.
 
Joe
----- Original Message -----
From:=20 BMears9413@aol.com
Sent: Sunday, January 13, 2008 = 12:18=20 PM
Subject: [FlyRotary] Re: = EC2

My setup came with the little mechanical relay...Bob White = changed it to=20 the electronic relay system. So I guess Im not sure exactly what I = have=20 now.
 
Bob Mears
Supermarine Spitfire



Start the year off right. Easy ways to stay in shape in the new year.=20
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