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Subject: Re: [FlyRotary] #1 rotor cutting out
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From: Tracy <rwstracy@gmail.com>
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Date: Wed, 21 Mar 2012 16:43:17 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Trying the B controller should always be the FIRST thing to try since it is t=
he easiest.   This needs to be ingrained in all EC2/3 users mental (or prefe=
rably written) engine failure check list.   Everything including the coil & i=
njector drivers are swapped out when selecting B controller.   Based on the n=
umber of time I have asked if the B controller was tried when called about a=
n engine anomally I have concluded that very few builders are even aware it i=
t 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.
>=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/
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