X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-junco.atl.sa.earthlink.net ([209.86.89.63] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5453025 for flyrotary@lancaironline.net; Thu, 22 Mar 2012 21:35:20 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.63; envelope-from=n360tg@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=WnQpMiFe1YEw0+YmzYIk8U6/i7kWIR+OVGGlTwb4FdWRz3yox43UbX+nIEmBm8qZ; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [184.0.224.156] (helo=[192.168.1.69]) by elasmtp-junco.atl.sa.earthlink.net with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.67) (envelope-from ) id 1SAtOv-00039n-N9 for flyrotary@lancaironline.net; Thu, 22 Mar 2012 20:34:45 -0500 From: Thomas Giddings Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-42--175517026 Subject: Re: [FlyRotary] Re: #1 rotor cutting out Date: Thu, 22 Mar 2012 21:34:44 -0400 In-Reply-To: To: "Rotary motors in aircraft" References: Message-Id: X-Mailer: Apple Mail (2.1084) X-ELNK-Trace: 77b0437ff618fec294f5150ab1c16ac07c540ca440b21de7e7f15b13804c6b567afe19f3d2cbca3d350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 184.0.224.156 --Apple-Mail-42--175517026 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Mark: Can you post a pic of your TB set-up? Tom G On Mar 22, 2012, at 8:41 PM, Mark Steitle wrote: > Ernest, >=20 > I seriously doubt it. Do you have a picture, or can you explain your = design? >=20 > Mark=20 >=20 > On Thu, Mar 22, 2012 at 8:54 AM, Ernest Christley = wrote: > The first iteration of my manifold exhibited similar symptoms to what = you describe. The EGTs of the #1 rotor wouldn't come off the peg until = I hit 3000rpm, and then would stay way below #2. I determined that the = way I had arranged it, the intake was creating a venturi vacuum in front = of the #1 rotor. Could you have a similar imbalance? >=20 > Mark Steitle wrote: >=20 > >Tracy, > > > >OUCH, that hurts! OK, here's the rest of the story. I've changed my > >intake manifold and changed injector sizes, so I'm back to the tuning > >phase. The B controller won't run right now as I haven't copied A to > >B yet. I'll have to do that before I can try the B controller. > >Thanks for reminding me that I typically do things the hard way. > > > >Mark > > > >On 3/21/12, Tracy wrote: > >> Trying the B controller should always be the FIRST thing to try = since it is > >> the easiest. This needs to be ingrained in all EC2/3 users mental = (or > >> preferably written) engine failure check list. Everything = including the > >> coil & injector drivers are swapped out when selecting B = controller. Based > >> on the number of time I have asked if the B controller was tried = when called > >> about an engine anomally I have concluded that very few builders = are even > >> aware it it there : ). > >> > >> Tracy > >> > >> Sent from my iPad > >> > >> On Mar 21, 2012, at 3:58 PM, Mark Steitle = wrote: > >> > >>> I have been chasing a problem with my p-port 3-rotor where the #1 > >>> rotor cuts out at around 3800 rpm, but comes back at around 5000 = rpm. > >>> When this happens, I can hear a change in the exhaust, and I see = the > >>> EGT on #1 drop way down to around 500*, so that's how I determined > >>> that it was the #1 rotor. The other two rotors continue to run > >>> normally. > >>> > >>> I have tried swapping coils, replacing the #1 rotor's plugs & coil > >>> wires, and swapping injectors. I have not tried the B controller, = but > >>> that sounds like what I should try next. My suspicion is there = may be > >>> a defective coil driver circuit in the EC-2. I have borrowed = another > >>> 20B EC-2 to try, but won't be able to do the swap until this = coming > >>> weekend. > >>> > >>> Since things have been so quiet on the list, I thought I would = post > >>> this strange problem and see what suggestions others may have. > >>> > >>> Mark S. > >>> > >>> -- > >>> Homepage: http://www.flyrotary.com/ > >>> Archive and UnSub: > >>> http://mail.lancaironline.net:81/lists/flyrotary/List.html > >> > >> -- > >> Homepage: http://www.flyrotary.com/ > >> Archive and UnSub: > >> http://mail.lancaironline.net:81/lists/flyrotary/List.html > >> > > > >-- > >Homepage: http://www.flyrotary.com/ > >Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html >=20 --Apple-Mail-42--175517026 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=us-ascii Mark: Can you post a pic of your TB set-up?

Tom G

On Mar 22, 2012, at 8:41 PM, Mark Steitle wrote:

Ernest,

I seriously doubt it.  Do you have a picture, or can you explain your design?

Mark 

On Thu, Mar 22, 2012 at 8:54 AM, Ernest Christley <echristley@att.net> wrote:
The first iteration of my manifold exhibited similar symptoms to what you describe.  The EGTs of the #1 rotor wouldn't come off the peg until I hit 3000rpm, and then would stay way below #2.  I determined that the way I had arranged it, the intake was creating a venturi vacuum in front of the #1 rotor.  Could you have a similar imbalance?

Mark Steitle <msteitle@gmail.com> wrote:

>Tracy,
>
>OUCH, that hurts!  OK, here's the rest of the story.  I've changed my
>intake manifold and changed injector sizes, so I'm back to the tuning
>phase.  The B controller won't run right now as I haven't copied A to
>B yet.  I'll have to do that before I can try the B controller.
>Thanks for reminding me that I typically do things the hard way.
>
>Mark
>
>On 3/21/12, Tracy <rwstracy@gmail.com> wrote:
>> Trying the B controller should always be the FIRST thing to try since it is
>> the easiest.   This needs to be ingrained in all EC2/3 users mental (or
>> preferably written) engine failure check list.   Everything including the
>> coil & injector drivers are swapped out when selecting B controller.   Based
>> on the number of time I have asked if the B controller was tried when called
>> about an engine anomally I have concluded that very few builders are even
>> aware it it there : ).
>>
>> Tracy
>>
>> Sent from my iPad
>>
>> On Mar 21, 2012, at 3:58 PM, Mark Steitle <msteitle@gmail.com> wrote:
>>
>>> I have been chasing a problem with my p-port 3-rotor where the #1
>>> rotor cuts out at around 3800 rpm, but comes back at around 5000 rpm.
>>> When this happens, I can hear a change in the exhaust, and I see the
>>> EGT on #1 drop way down to around 500*, so that's how I determined
>>> that it was the #1 rotor.  The other two rotors continue to run
>>> normally.
>>>
>>> I have tried swapping coils, replacing the #1 rotor's plugs & coil
>>> wires, and swapping injectors.  I have not tried the B controller, but
>>> that sounds like what I should try next.  My suspicion is there may be
>>> a defective coil driver circuit in the EC-2.  I have borrowed another
>>> 20B EC-2 to try, but won't be able to do the swap until this coming
>>> weekend.
>>>
>>> Since things have been so quiet on the list, I thought I would post
>>> this strange problem and see what suggestions others may have.
>>>
>>> Mark S.
>>>
>>> --
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub:
>>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:
>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>
>
>--
>Homepage:  http://www.flyrotary.com/
>Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html


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