X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 05 Jun 2013 15:37:17 -0400 Message-ID: X-Original-Return-Path: Received: from mail-qc0-f169.google.com ([209.85.216.169] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6309490 for lml@lancaironline.net; Wed, 05 Jun 2013 15:17:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.169; envelope-from=pjdmiller@gmail.com Received: by mail-qc0-f169.google.com with SMTP id c10so702123qcz.14 for ; Wed, 05 Jun 2013 12:16:32 -0700 (PDT) X-Received: by 10.224.7.195 with SMTP id e3mr30582630qae.5.1370459792149; Wed, 05 Jun 2013 12:16:32 -0700 (PDT) X-Original-Return-Path: Received: from pjdms-mbp.cfl.rr.com ([68.202.59.203]) by mx.google.com with ESMTPSA id y14sm73774920qac.0.2013.06.05.12.16.31 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 05 Jun 2013 12:16:31 -0700 (PDT) Content-Type: text/plain; charset=iso-8859-1 Mime-Version: 1.0 (Mac OS X Mail 6.3 \(1503\)) Subject: Re: [LML] Fuel flow From: Paul Miller In-Reply-To: X-Original-Date: Wed, 5 Jun 2013 15:16:24 -0400 Content-Transfer-Encoding: quoted-printable X-Original-Message-Id: References: X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.1503) Diodes in the ALT need to be checked first. On 2013-06-05, at 3:13 PM, "Greenbacks, UnLtd." = wrote: > The 550 mile flight this morning from KBVY-KRKD-KEPM-KBVY was crystal = clear VFR with 195kts TAS, 5500ft, 24"MP, 2400RPM, 8.2GPH, 25=BALOP > and 22.5MPG...not too shabby for this little pip-sqweak of a plane.=20 >=20 > The good news is that my continuing issue with erratic MVP-50 fuel = flow readings > has now been identified but the solution will be a real pain to fix. = Turning off the ALT instantly caused FF readings to become rock solid! = Go figure. > I'll have to remove the cowl in order to refresh my aging memory on = how the ALT output lead is plumbed but at some point it must be too = close to the FF cable. After the fact it sounds like common sense but = don't run any sensor wires aft from the engine compartment in the same = wire bundle which includes the ALT lead. Short of relocating wires, do = we have an electrical wizard here with a more elegant solution? I = suppose that any time I want to see accurate fuel data, I could simply = shut off the ALT for a few seconds. :-) >=20 > Angier Ames > N4ZQ > 35hrs >=20 > -- > For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html