Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Mon, 05 Apr 2004 11:09:56 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m15.mx.aol.com ([64.12.138.205] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3146548 for lml@lancaironline.net; Mon, 05 Apr 2004 08:33:41 -0400 Received: from Sky2high@aol.com by imo-m15.mx.aol.com (mail_out_v37_r1.2.) id q.dd.75af149 (3842) for ; Mon, 5 Apr 2004 08:33:37 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Mon, 5 Apr 2004 08:33:37 EDT Subject: Re: [LML] Partial power loss - IMC X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1081168417" X-Mailer: 9.0 for Windows sub 820 -------------------------------1081168417 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 4/5/2004 12:00:24 AM Central Standard Time, edechazal@comcast.net writes: So, does everyone agree that induction icing, more specifically, air filter icing was the likely culprit? If so, why doesn't this happen more often, since air filters are universal, and some, like Cessna, are right in front in the open? Could it be an installation problem in my case? Ed, Nice job of getting back on the ground so that you could relate this event to us. Working backwards, carbureted Cessnas have carb heat air available and injected ones have an alternate air door (automatic, spring loaded). Sure seems like induction air blockage, where the throttle position (WOT?) does not match the little amount of air available and the 4 venturi tubes in the throttle body are not seeing much air go by so the fuel flow is reduced. The hiccups may have been from water passing thru the system. Reducing the throttle was a better match to the air leaking into the system. Remember that at idle, the throttle plate is almost completely closed. Airflow into the engine cooling plenum is different during climb and maybe that allowed rain to collect or soak the filter that then became frozen? It would seem that you usually fly thru rain on ram air. I think you must consider the ram air as the "alternate" air source during any engine difficulty. You are the spring! Scott Krueger AKA Grayhawk Sky2high@aol.com II-P N92EX IO320 Aurora, IL (KARR) LML, where ideas collide and you decide! -------------------------------1081168417 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 4/5/2004 12:00:24 AM Central Standard Time,=20 edechazal@comcast.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>So, does=20 everyone agree that induction icing, more specifically, air filter
icin= g=20 was the likely culprit?  If so, why doesn't this happen more=20 often,
since air filters are universal, and some, like Cessna, are righ= t in=20 front in
the open?  Could it be an installation problem in my=20 case?
Ed,
 
Nice job of getting back on the ground so that you could relate this ev= ent=20 to us.
 
Working backwards, carbureted Cessnas have carb heat air available= and=20 injected ones have an alternate air door (automatic, spring loaded).
 
Sure seems like induction air blockage, where the throttle position=20 (WOT?) does not match the little amount of air available and the 4 vent= uri=20 tubes in the throttle body are not seeing much air go by so the fuel flow is= =20 reduced.  The hiccups may have been from water passing thru the=20 system.  Reducing the throttle was a better match to the air leaking in= to=20 the system.  Remember that at idle, the throttle plate is almost comple= tely=20 closed.
 
Airflow into the engine cooling plenum is different during climb and ma= ybe=20 that allowed rain to collect or soak the filter that then became frozen?&nbs= p;=20 It would seem that you usually fly thru rain on ram air.
 
I think you must consider the ram air as the "alternate" air source dur= ing=20 any engine difficulty. You are the spring!=20
 
Scott Krueger=20 AKA Grayhawk
Sky2high@aol.com
II-P N92EX IO320 Aurora, IL=20 (KARR)

LML, where ideas collide and you=20 decide!
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