X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-vw0-f52.google.com ([209.85.212.52] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4248418 for flyrotary@lancaironline.net; Wed, 05 May 2010 07:10:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.212.52; envelope-from=rwstracy@gmail.com Received: by vws15 with SMTP id 15so3209411vws.25 for ; Wed, 05 May 2010 04:09:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=JGe4qit860V4uOdq5mD2BSAgWS1VbxzKaUk4xlqfl80=; b=dBgONqsrbh4NdDQde71xQfOEg/Th5+yy52a9wTiWefXrLx9TG6PNngIzMdRL55nK+l 64ZDthtg24TwlVJsvcLhTSxiFy+zZYXM8HCmqhM7pmJ7kaG5baDEWt+1P9nj5v+Qo1/4 4UqFJvzADlrHyOYVPse/Dn+ahBYMwYSx/J2yk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=vFD+5aRXxiC8WejTdm+t3iSJJ2rPdseGYRrl0ZaIgGYgbRZdfCcC5gD7OfrqnmfM4s L0IZLHRi6npzk5O+4JMQ+Ho0hD3hd8b6FKSkuMqcg9QyzyS4YJXNjcrC4KQPpLz+bNgp 4Grpc2OMgaQDi3kXYOqHiv+QPJ+B4TDc5izFY= MIME-Version: 1.0 Received: by 10.220.60.138 with SMTP id p10mr7899589vch.152.1273057785444; Wed, 05 May 2010 04:09:45 -0700 (PDT) Sender: rwstracy@gmail.com Received: by 10.220.170.208 with HTTP; Wed, 5 May 2010 04:09:45 -0700 (PDT) In-Reply-To: References: Date: Wed, 5 May 2010 07:09:45 -0400 X-Google-Sender-Auth: d7cb91e13d95a28a Message-ID: Subject: Re: [FlyRotary] Re: fuel filters From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=e0cb4e8873f51479000485d6dd02 --e0cb4e8873f51479000485d6dd02 Content-Type: text/plain; charset=ISO-8859-1 *A little more detail on symptoms that led you to change filters please? Was this for the 20B?* Yes, this was on the 20B but it would apply to any installation. Symptoms were mixture going lean at higher throttle settings. This was a slowly progressive thing, not a sudden occurrence. Cause was dropping fuel pressure due to clogged filter. When throttled back, fuel pressure returned to normal and engine ran fine. This would of course get worse and worse as the filter became more and more restrictive. I don't think this could happen suddenly unless you had a large amount of foreign matter in the tank. It certainly can't cause the random intermittent miss that Bill had which started this thread. Tracy On Tue, May 4, 2010 at 10:54 PM, Mike Wills wrote: > Tracy, > > A little more detail on symptoms that led you to change filters please? Was > this for the 20B? > > Although I'm not convinced that it was necessary, for lack of a better > answer I replaced my filters after my fuel starvation episode a while back. > I still have no smoking gun that I can point to as the cause of this > isolated incident. Keep waiting for the sudden unexplainable re-occurrence. > Hope when/if it happens I'm near something landable. > > Mike Wills > > *From:* Tracy Crook > *Sent:* Tuesday, May 04, 2010 9:58 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: fuel filters > > "*Big fuel filters are essential, especially for those with composite > tanks*." > > I second that. Just had to change out my nice looking Jegs Billet aluminum > filter (with a tiny screen disk filter inside) for Peterson 600 series fuel > filter. This is the filter between tank and fuel pump, not the high > pressure one after the pumps. > > Tracy > > On Tue, May 4, 2010 at 12:34 PM, John Slade wrote: > >> For what it's worth, I've seen the symptoms of a partially blocked filter >> and restricted fuel flow while airborne....The mixture creeps toward lean, >> the EGT creeps up, fuel pressure is erratic and moving lower . Tweak the >> mixture knob toward rich and everything is fine for 10 mins, then the cycle >> begins again. Big fuel filters are essential, especially for those with >> composite tanks. >> Regards, >> John >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > --e0cb4e8873f51479000485d6dd02 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable A little more detail on symptoms that led you to= =20 change=20 filters please? Was this for the 20B?

Yes, this was on the 20B b= ut it would apply to any installation. =A0=A0 Symptoms were mixture going l= ean at higher throttle settings.=A0 This was a slowly progressive thing, no= t a sudden occurrence.=A0 Cause was dropping fuel pressure due to clogged f= ilter.=A0 When throttled back, fuel pressure returned to normal and engine = ran fine.=A0 This would of course get worse and worse as the filter became = more and more restrictive.=A0

I don't think this could happen suddenly unless you had a large amo= unt of foreign matter in the tank.=A0 It certainly can't cause the rand= om intermittent miss that Bill had which started this thread. =A0

T= racy

On Tue, May 4, 2010 at 10:54 PM, Mike= Wills <rv-4mike@c= ox.net> wrote:
Tracy,
=A0
A little more detail on symptoms that led you t= o change=20 filters please? Was this for the 20B?
=A0
Although I'm not convinced that it was nece= ssary, for=20 lack of a better answer I replaced my filters after my fuel starvation epis= ode a=20 while back. I still have no smoking gun that I can point to as the cause of= this=20 isolated incident. Keep waiting for the sudden unexplainable re-occurrence.= Hope=20 when/if it happens I'm near something landable.
=A0
Mike Wills

Sent: Tuesday, May 04, 2010 9:58 AM
To: Rotary motors in aircraft <= /div>
Subject: [FlyRotary] Re: fuel filters

"Big fuel filters are essential, especially for thos= e with=20 composite tanks."

I second that.=A0 Just had to change out = my nice=20 looking Jegs Billet aluminum filter (with a tiny screen disk filter inside)= for=20 Peterson 600 series fuel filter.=A0=A0 This is the filter between tank and= =20 fuel pump, not the high pressure one after the pumps.

Tracy

On Tue, May 4, 2010 at 12:34 PM, John Slade <jslade@canardaviation.com>=20 wrote:
For what it's= worth, I've seen the symptoms of a partially=20 blocked filter and restricted fuel flow while airborne....The mixture cre= eps=20 toward lean, the EGT creeps up, fuel pressure is erratic and moving lower= .=20 Tweak the mixture knob toward rich and everything is fine for 10 mins, th= en=20 the cycle begins again. Big fuel filters are essential, especially for th= ose=20 with composite tanks.
Regards,
John

=
--
Homepage: =A0http://www.flyrotary.com/
Archive and UnSub: =A0 h= ttp://mail.lancaironline.net:81/lists/flyrotary/List.html


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