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Subject: Re: [FlyRotary] Re: #1 rotor cutting out
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From: Tracy <rwstracy@gmail.com>
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Date: Thu, 22 Mar 2012 09:13:52 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Sorry Mark, that came out a bit harsher than I intended!   BTW,   the curren=
t version of the EC2/3 software (since about two months ago) now programs bo=
th A & B when you tune A.   You can still program B differently when running=
 on B if desired as changes to B do not affect A.  =20

On your rotor 1 symptoms between 3800 and 5000, I was wondering if you still=
 had the resistor between CAS and EC2 that you were using to try and make th=
e Renesis CAS work.  If so, you might try eliminating it since you are using=
 the original CAS.   That's one reason I was anxious to hear if B had the sa=
me symptom.

Sounds like the CAS sensor circuit change I installed in (Brian's ?) EC2 13-=
BREW  fixed the high rpm breakup problem so anyone having similar symptoms o=
n BREW or Renesis engines using the EC2 should have that change too.

Tracy

Sent from my iPad

On Mar 21, 2012, at 4:56 PM, Mark Steitle <msteitle@gmail.com> wrote:

> Tracy,
>=20
> 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.
>=20
> Mark
>=20
> On 3/21/12, Tracy <rwstracy@gmail.com> wrote:
>> Trying the B controller should always be the FIRST thing to try since it i=
s
>> 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.   Ba=
sed
>> on the number of time I have asked if the B controller was tried when cal=
led
>> about an engine anomally I have concluded that very few builders are even=

>> aware it it there : ).
>>=20
>> Tracy
>>=20
>> Sent from my iPad
>>=20
>> On Mar 21, 2012, at 3:58 PM, Mark Steitle <msteitle@gmail.com> wrote:
>>=20
>>> 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.
>>>=20
>>> 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.
>>>=20
>>> Since things have been so quiet on the list, I thought I would post
>>> this strange problem and see what suggestions others may have.
>>>=20
>>> Mark S.
>>>=20
>>> --
>>> 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
>=20
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List=
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