X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from EXHUB003-3.exch003intermedia.net ([207.5.74.110] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTPS id 3760059 for flyrotary@lancaironline.net; Wed, 15 Jul 2009 10:46:23 -0400 Received-SPF: none receiver=logan.com; client-ip=207.5.74.110; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by EXHUB003-3.exch003intermedia.net ([207.5.74.110]) with mapi; Wed, 15 Jul 2009 07:45:46 -0700 From: Jeff Whaley To: Rotary motors in aircraft Date: Wed, 15 Jul 2009 07:45:46 -0700 Subject: RE: [FlyRotary] Re: Sediment bowls in EFI fuel systems Thread-Topic: [FlyRotary] Re: Sediment bowls in EFI fuel systems Thread-Index: AcoFWM6SLxQZTo4LTLe7VFb7/EAmXwAAY1UA Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E01403642CFADEXVMBX0035e_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0E01403642CFADEXVMBX0035e_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Al, Yes it does contain a fine-screen filter. I'm contemplating removing the bowl entirely and replacing it with a block = of aluminum with a quick drain at bottom ... the drain is handy for getting= fuel out of the engine fuel rails during maintenance. Jeff From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Al Gietzen Sent: Wednesday, July 15, 2009 11:27 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Sediment bowls in EFI fuel systems Jeff; Does the sediment bowl include a fine screen filter? If so I'd take it out= or replace with a coarser screen. Potential pressure drop (flow impediment= ) upstream of the hp pump is a vapor lock concern. Al G -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Jeff Whaley Sent: Wednesday, July 15, 2009 4:34 AM To: Rotary motors in aircraft Subject: [FlyRotary] Sediment bowls in EFI fuel systems Any comments about sediment bowls in the EFI system - are they an asset or = a liability? Though my fuel is gravity-fed to the sediment bowl and the EFI pumps are af= ter, is the flow-rate through the bowl exceeding its design/application int= ention? I have heard that a sediment bowl is not mandatory as long as there is a dr= ain at the lowest point in fuel system. I ask because mine was leaking the other day at the seal between bowl and r= ubber gasket - tightened up the thumb screw and it seems to be okay - yes i= t was previously lock-wired, though maybe the thumb screw was not as tight = as it is now. Jeff (finally expecting to fly again tonight with cooling mods complete) --_000_C03ABB0A7362B84BB53D544B3C305E0E01403642CFADEXVMBX0035e_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Al, Yes it does contain = a fine-screen filter.

I’m contemplating = removing the bowl entirely and replacing it with a block of aluminum with a quick drain = at bottom … the drain is handy for getting fuel out of the engine fuel r= ails during maintenance.

Jeff

=

From: Rotary motors= in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietze= n
Sent: Wednesday, July 15, 2009 11:27 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Sediment bowls in EFI fuel systems

Jeff;

Does the sediment bowl include a fine screen filter? If so I’d take = it out or replace with a coarser screen. Potential pressure drop (flow impediment) upstream of the hp pump is a vapor lock concern.

Al G

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]= On Behalf Of Jeff Whaley
Sent: Wednesday, July 15, 2009 4:34 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Sediment bowls in EFI fuel systems<= /o:p>

Any comments about sediment= bowls in the EFI system – are they an asset or a liability?

Though my fuel is gravity-f= ed to the sediment bowl and the EFI pumps are after, is the flow-rate through the bowl exceeding its design/application intention?

I have heard that a sedimen= t bowl is not mandatory as long as there is a drain at the lowest point in fuel system.

I ask because mine was leak= ing the other day at the seal between bowl and rubber gasket – tightened up t= he thumb screw and it seems to be okay – yes it was previously lock-wired, tho= ugh maybe the thumb screw was not as tight as it is now.

Jeff (finally expecting to = fly again tonight with cooling mods complete)

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