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Date: Wed, 21 Mar 2012 15:56:44 -0500
Message-ID: <CAHh3jbMt=xx_HctfAM7Pf+koMnkcafZvm-5SZH1ogTispd+J4w@mail.gmail.com>
Subject: Re: [FlyRotary] Re: #1 rotor cutting out
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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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.
>>
>> --
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