X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 17 Jun 2011 12:45:29 -0400 Message-ID: X-Original-Return-Path: Received: from s7.cableone.net ([24.116.0.233] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5023711 for lml@lancaironline.net; Fri, 17 Jun 2011 12:39:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.116.0.233; envelope-from=bbreen@cableone.net Received: from toshibauser (unverified [96.19.151.65]) by s7.cableone.net (CableOne SMTP Service s7) with ESMTP id 43958306-1872270 for ; Fri, 17 Jun 2011 09:38:45 -0700 X-Original-Return-Path: From: "Berni" X-Original-To: "'Lancair Mailing List'" Subject: fuel pressure and fuel flow X-Original-Date: Fri, 17 Jun 2011 11:38:41 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0098_01CC2CE3.1BCB04F0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 thread-index: AcwtDQEz9k7AseHtTzCrVAVb0JKALg== X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6090 X-Original-Message-ID: <1308328725_271@s7.cableone.net> X-Vpipe: Scanner said ok (av_avast) X-NotAscii: charset=us-ascii X-IP-stats: No info recorded yet ip=96.19.151.65 X-Originating-IP: 96.19.151.65 X-Abuse-Info: Send abuse complaints to abuse@cableone.net This is a multi-part message in MIME format. ------=_NextPart_000_0098_01CC2CE3.1BCB04F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Can anyone offer input as their take on the following data. It is fuel flow and fuel pressure readings on a normally aspirated Continental IO520 powered Lancair IV. On a flight today we experienced a very poorly running engine as we gained altitude. Fuel Flow Fuel Pressure On runway 25.57 15 1000' 24.3 15 2000' 24.2 15 3000' 23.0 13 4000' 22.0 13 5000' 20.6 12 6000' 19.0 11 7000' 18.0 10 At 6,500' the engine began surging. When we turned the auxiliary fuel pump on the engine immediately ran fine. We have now had the engine driven pump overhauled. We have pulled vacuum through the entire fuel system and we have no leaks. We replaced 100% of the flexible fuel lines. Metered and un-metered fuel pressures are reset and fine. We are at a loss as to what is causing our engine surging problem. Berni ------=_NextPart_000_0098_01CC2CE3.1BCB04F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Can anyone offer input as their take on the following data.  It is fuel flow and fuel pressure readings on a normally = aspirated Continental IO520 powered Lancair IV.  On a flight today we experienced a very = poorly running engine as we gained altitude.  =

 

      =             &= nbsp;     Fuel = Flow         &nbs= p;           Fuel Pressure

= On runway       25.57           &n= bsp;           &nb= sp;    15

= 1000’          &n= bsp;     24.3           &nb= sp;           &nbs= p;      15

= 2000’          &n= bsp;     24.2           &nb= sp;           &nbs= p;      15

= 3000’          &n= bsp;     23.0           &nb= sp;           &nbs= p;      13

= 4000’          &n= bsp;     22.0           &nb= sp;           &nbs= p;      13

= 5000’          &n= bsp;     20.6           &nb= sp;           &nbs= p;      12

= 6000’          &n= bsp;     19.0           &nb= sp;           &nbs= p;      11

= 7000’          &n= bsp;     18.0           &nb= sp;           &nbs= p;      10

 

At 6,500’ the engine began surging.  When = we turned the auxiliary fuel pump on the engine immediately ran fine.  = We have now had the engine driven pump overhauled.  We have pulled = vacuum through the entire fuel system and we have no leaks.  We replaced = 100% of the flexible fuel lines.  Metered and un-metered fuel pressures are = reset and fine.  We are at a loss as to what is causing our engine = surging problem.

 

Berni   

 

 

 

 

 

------=_NextPart_000_0098_01CC2CE3.1BCB04F0--