X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [129.116.87.143] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 950941 for flyrotary@lancaironline.net; Fri, 20 May 2005 09:37:44 -0400 Received-SPF: none receiver=logan.com; client-ip=129.116.87.143; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C55D40.FF020DE6" Subject: RE: [FlyRotary] Re: EC-2 Breakers Date: Fri, 20 May 2005 08:36:58 -0500 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E016C190D@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: EC-2 Breakers Thread-Index: AcVc2Nue7fvyiidpQT2BF2wAdBzOSQAZ/rNw From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C55D40.FF020DE6 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Joe, Thanks, that's the info I was looking for. =20 =20 Mark S. =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Joe Sent: Thursday, May 19, 2005 8:08 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: EC-2 Breakers =20 Mark, Following are answers to my EC2 questions from Tracy. You may find this helpfull. I would suggest whether you decide on fused or breakers, make sure you review the trip characteristics - not all fuses are created equal (overload vs trip time.) Joe=20 =20 =20 ----- Original Message -----=20 From: Tracy Crook =20 =20 Sent: Friday, December 31, 2004 1:46 PM Subject: Re: EC-2 Questions =20 Joe, see answers below. ----- Original Message -----=20 =20 To: tcrook@rotaryaviation.com=20 Sent: Thursday, December 30, 2004 11:47 PM Subject: EC-2 Questions =20 Tracy, =20 I would like to check on some EC-2 specs, before I layout my wiring harnesses this weekend. Some of the wire sizes sound too small to me (like 22 ga for the power circuit on the ignition coils.) They may be able to handle the amperage, but I am concerned about the voltage drops. I have a canard so my runs are much longer than say an RV. So that I can calculate wire size could you supply the following: =20 1. What is the max current the controller can draw? =20 1/4 amp. =20 2. What is the minimum operating voltage of the EC-2? =20 about 7 volts. =20 3. The terminal assignment sheet lists both 32 and 33 as Controller Power Connections. Are these power connections internally separated (i.e. 32 supplies circuit A, 33 supplies circuit B) or are they internally connected? =20 Tied together internally. =20 4. What is the max current draw on each ignition coil (not the trigger circuit.) =20 If they saturate they can draw as much as 8 amps each. Normally they do not saturate so average current is much lower. =20 5. What is the max current draw on the injectors and minimum operating voltage. I have a 40 to 50 foot circuit length and want to make sure 22 ga is big enough. =20 2 amps. 50 feet? wow. =20 6. Is the coil disable test switch required? I am using 2 circuits supplying power to the coils, one on the primary coils and one on the secondary coils. This will allow me to isolate/test the primaries or secondaries. =20 That will work fine. You can eliminate the test switch if you want. ----- Original Message -----=20 From: Mark R Steitle =20 To: Rotary motors in aircraft =20 Sent: Thursday, May 19, 2005 10:02 AM Subject: [FlyRotary] EC-2 Breakers =20 Ed, Since you're running breakers on the flight critical stuff, can you tell me the recommended breaker size for the EC-2 controller? Tracy seems to have hidden this information somewhere in the fine print. I'm assuming that it would be the same for the 3-rotor engine? =20 =20 Mark S. ------_=_NextPart_001_01C55D40.FF020DE6 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Joe,

Thanks, that’s the info I was = looking for. 

 

Mark = S.

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Joe
Sent: Thursday, May 19, = 2005 8:08 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = EC-2 Breakers

 

Mark,

Following are answers to my EC2 questions from = Tracy.  = You may find this helpfull. I would suggest whether you decide on fused or = breakers, make sure you review the trip characteristics - not all fuses are = created equal (overload vs trip time.)

Joe 

 

 

----- Original Message ----- =

From: Tracy Crook =

 

Sent: Friday, = December 31, 2004 1:46 PM

Subject: Re: = EC-2 Questions

 

Joe, see answers below.

----- Original Message ----- =

 

Sent: = Thursday, December 30, 2004 11:47 PM

Subject: EC-2 = Questions

 

Tracy,=

 

I would like to check on some EC-2 specs, before I = layout my wiring harnesses this weekend.  Some of the wire sizes sound too = small to me (like 22 ga for the power circuit on the ignition coils.)  They may = be able to handle the amperage, but I am concerned about the voltage drops.  I = have a canard so my runs are much longer than say an RV.  So that I can = calculate wire size could you supply the = following:

 

1.  What is the max current the controller can = draw?

 

1/4 amp.

 

2.  What is the minimum operating voltage of the = EC-2?

 

about 7 volts.

 

3.  The terminal assignment sheet lists both 32 = and 33 as Controller Power Connections.  Are these power connections = internally separated (i.e. 32 supplies circuit A, 33 supplies circuit B) or are they = internally connected?

 

Tied together = internally.

 

4.  What is the max current draw on each = ignition coil (not the trigger circuit.)

 

If they saturate they can draw as much as 8 = amps each.  Normally they do not saturate so average current is much = lower.

 

5.  What is the max current draw on the = injectors and minimum operating voltage.  I have a 40 to 50 foot circuit length and want = to make sure 22 ga is big enough.

 

2 amps.  50 feet?  = wow.

 

6.  Is the coil disable test switch = required?  I am using 2 circuits supplying power to the coils, one on the primary coils and one = on the secondary coils.  This will allow me to isolate/test the primaries = or secondaries.

 

That will work fine.  You can eliminate the test = switch if you want.

----- Original Message ----- =

From: Mark R Steitle =

Sent: = Thursday, May 19, 2005 10:02 AM

Subject: = [FlyRotary] EC-2 Breakers

 

Ed,

Since you’re running breakers on the flight = critical stuff, can you tell me the recommended breaker size for the EC-2 controller?  Tracy seems to have hidden this information somewhere in the fine print.  I’m assuming that it would be the same for the 3-rotor = engine? 

 

Mark S.

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