X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from SMTP01.INFOAVE.NET ([165.166.0.26] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 950566 for flyrotary@lancaironline.net; Thu, 19 May 2005 21:11:31 -0400 Received-SPF: none receiver=logan.com; client-ip=165.166.0.26; envelope-from=Jewen@Comporium.net Received: from engineer1 ([206.74.87.186]) by SMTP00.InfoAve.Net (PMDF V6.2-X31 #30772) with SMTP id <01LOGFVP4ZXO9EX2I4@SMTP00.InfoAve.Net> for flyrotary@lancaironline.net; Thu, 19 May 2005 21:10:19 -0400 (EDT) Date: Thu, 19 May 2005 21:08:21 -0400 From: Joe Subject: Re: [FlyRotary] EC-2 Breakers To: Rotary motors in aircraft Message-id: <002001c55cd8$6a58e830$6532a8c0@engineer1> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Mailer: Microsoft Outlook Express 6.00.2800.1158 Content-type: multipart/alternative; boundary="----=_NextPart_000_001D_01C55CB6.E2E88660" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C55CB6.E2E88660 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 ----- Original Message -----=20 From: Tracy Crook=20 Sent: Friday, December 31, 2004 1:46 PM Subject: Re: EC-2 Questions 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 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? 1/4 amp. =20 2. What is the minimum operating voltage of the EC-2? 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? Tied together internally. =20 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. =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. 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. 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 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_000_001D_01C55CB6.E2E88660 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Mark,

Following are answers to my EC2 = questions from=20 Tracy. You may find this helpfull. I would suggest whether = you decide=20 on fused or breakers, make sure you review the trip characteristics - = not all=20 fuses are created equal (overload vs trip time.)

Joe

----- Original Message -----=20

From: Tracy Crook =

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

Subject: Re: EC-2 Questions

Joe, see answers below.

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

To: tcrook@rotaryaviation.com =

Sent: Thursday, December 30, = 2004 11:47=20 PM

Subject: EC-2 Questions

Tracy,

I would like to check on = some EC-2=20 specs, before I layout my wiring harnesses this weekend. Some of the wire sizes sound = too small=20 to me (like 22 ga for the power circuit on the ignition coils.) They may be able to handle = the=20 amperage, but I am concerned about the voltage drops. I have a canard so my runs = are much=20 longer than say an RV. = So that I=20 can calculate wire size could you supply the = following:

1. What is the max current the = controller=20 can draw?

1/4 = amp.

2. What is the minimum = operating voltage=20 of the EC-2?

about 7 = volts.

3. The terminal assignment = sheet lists=20 both 32 and 33 as Controller Power Connections. Are these power connections = internally=20 separated (i.e. 32 supplies circuit A, 33 supplies circuit B) or are = they=20 internally connected?

Tied together=20 internally.

4. What is the max current draw = on each=20 ignition coil (not the trigger circuit.)

If they saturate = they can=20 draw as much as 8 amps each. Normally they do not saturate so = average=20 current is much lower.

5. What is the max current draw = on the=20 injectors and minimum operating voltage. =20 I have a 40 to 50 foot circuit length and want to make sure 22 = ga is=20 big enough.

2 amps. 50 = feet? =20 wow.

6. Is the coil disable test = switch=20 required? I am using 2 = circuits=20 supplying power to the coils, one on the primary coils and one on the=20 secondary coils. This = will allow=20 me to isolate/test the primaries or secondaries.

That will work = fine. You can=20 eliminate the test switch if you=20 want.

----- Original Message -----
From:=20 Mark R Steitle =
To: Rotary motors in = aircraft

Sent: Thursday, May 19, 2005 = 10:02=20 AM

Subject: [FlyRotary] EC-2 = Breakers

Ed,

Since you=92re running = breakers on=20 the flight critical stuff, can you tell me the recommended breaker = size for=20 the EC-2 controller? Tracy seems to have hidden this = information=20 somewhere in the fine print. I=92m assuming that it would be the = same for=20 the 3-rotor engine?

Mark=20 S.

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