Received-SPF: softfail
 receiver=logan.com; client-ip=68.230.241.144; envelope-from=glasair2@me.com
Content-Type: text/plain; charset=us-ascii
Mime-Version: 1.0 (Apple Message framework v1084)
Subject: Re: [FlyRotary] Re: My Mistral Engine Status
From: Steve Thomas <glasair2@me.com>
In-Reply-To: <list-4952129@logan.com>
Date: Wed, 20 Apr 2011 09:08:49 -0700
Content-Transfer-Encoding: quoted-printable
Message-Id: <1F07FA39-6A20-4F71-9C1E-927E47C97DA4@me.com>
References: <list-4952129@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Thanks for the comments, Tracy.  I do indeed have mismatched EGTs.  =
Rotor 1 is running at 1800 or a little higher and rotor 2 is running at =
1700, lean, 60% power.  Rotor 2 is consistently 100 or more degrees =
cooler than rotor 1.  While the upper temperatures may be OK, the =
Mistral ECU reports a critical condition and drives me nuts.  But, the =
mismatch is the concern.  I get a warning indication at about 1700 and a =
critical indication at ~1780. =20

I do not have a variable mixture control.  All I have is a rich/lean =
momentary switch.  So, only two conditions.  But the lean condition =
always increases the EGTs by a good 100 degrees. =20

My exhaust is also 321 SS, .065 wall.  So, I'm not worried about that. =20=


Best Regards,

Steve Thomas

_______________________________________________________


On Apr 20, 2011, at 8:32 AM, Tracy wrote:

> Hi Steve,
>    When you say your EGTs are too high, what do you consider too hot?  =
 When at WOT on takeoff mine run 1840 F which sounds high but after =
1800+ hours I'm convinced that this isn't too hot.   In cruise I lean it =
down to as low as 1520.   My exhaust system is 321 SS, nothing exotic.
>=20
> If your EGT problem is due to a clogged injector it will be obvious by =
very mis-matched EGTs.  Unless of course you have two partly clogged =
injectors which is very unlikely.=20
>=20
> BTW, do you have a manual mixture control on the Mistral system?