X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from omr-d07.mx.aol.com ([205.188.109.204] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6309633 for lml@lancaironline.net; Wed, 05 Jun 2013 16:25:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.109.204; envelope-from=Sky2high@aol.com Received: from mtaomg-mb03.r1000.mx.aol.com (mtaomg-mb03.r1000.mx.aol.com [172.29.41.74]) by omr-d07.mx.aol.com (Outbound Mail Relay) with ESMTP id E372670037549 for ; Wed, 5 Jun 2013 16:25:07 -0400 (EDT) Received: from core-mta001c.r1000.mail.aol.com (core-mta001.r1000.mail.aol.com [172.29.234.129]) by mtaomg-mb03.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 877A9E00008D for ; Wed, 5 Jun 2013 16:25:07 -0400 (EDT) From: Sky2high@aol.com Full-name: Sky2high Message-ID: Date: Wed, 5 Jun 2013 16:25:07 -0400 (EDT) Subject: Re: [LML] Re: Fuel flow To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_ce132.58d22134.3ee0f8a3_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1370463907; bh=DHJVf86toKYKQOcVD7pyvwFL6jtEe7F/C11LBKKjxuo=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=FI/RdXWcXER8Ez0oFYn8LVySVXFl32LQT2NS64gmfTctP00IGzU6/4F6FEqwjCmnh GYANTfUcgGib6Z1OXvnDhYRAZNpYpqBJeSCydkV3rFD3HiIKicr9fpv/pvMyOW3iSL CiT/sYJb0CajUEPXUFV1kL0Qvx/FgB/KccxBg0zg= X-AOL-SCOLL-SCORE: 0:2:441992032:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d294a51af9ea30513 --part1_ce132.58d22134.3ee0f8a3_boundary Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Angier, =20 The wires from the sensor should be shielded (ground connected at one end = =20 of shield). =20 Grayhawk =20 =20 In a message dated 6/5/2013 2:14:42 P.M. Central Daylight Time, =20 N4ZQ@VERIZON.NET writes: The 550 mile flight this morning from KBVY-KRKD-KEPM-KBVY was crystal=20 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 The good news is that my continuing issue with erratic MVP-50 fuel flow=20 readings has now been identified but the solution will be a real pain to fix.=20 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=20 the ALT output lead is plumbed but at some point it must be too close to t= he=20 FF cable. After the fact it sounds like common sense but don't run any=20 sensor wires aft from the engine compartment in the same wire bundle which= =20 includes the ALT lead. Short of relocating wires, do we have an electrical= =20 wizard here with a more elegant solution? I suppose that any time I want t= o see=20 accurate fuel data, I could simply shut off the ALT for a few seconds. :-) Angier Ames N4ZQ 35hrs -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.htm= l --part1_ce132.58d22134.3ee0f8a3_boundary Content-Type: text/html; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable

Angier,

The wires from the sensor should be shielded (ground connected at one = end=20 of shield).

Grayhawk

In a message dated 6/5/2013 2:14:42 P.M. Central Daylight Time,=20 N4ZQ@VERIZON.NET writes:

= The 550=20 mile flight this morning from KBVY-KRKD-KEPM-KBVY was crystal clear VFR w= ith=20 195kts TAS, 5500ft, 24"MP, 2400RPM, 8.2GPH, 25=BALOP
and 22.5MPG...not= too=20 shabby for this little pip-sqweak of a plane.

The good news is th= at my=20 continuing issue with erratic MVP-50 fuel flow readings
has now been= =20 identified but the solution will be a real pain to fix. Turning off the A= LT=20 instantly caused FF readings to become rock solid! Go figure.
I'll hav= e to=20 remove the cowl in order to refresh my aging memory on how the ALT output= lead=20 is plumbed but at some point it must be too close to the FF cable. After = the=20 fact it sounds like common sense but don't run any sensor wires aft from = the=20 engine compartment in the same wire bundle which includes the ALT lead. S= hort=20 of relocating wires, do we have an electrical wizard here with a more ele= gant=20 solution? I suppose that any time I want to see accurate fuel data, I cou= ld=20 simply shut off the ALT for a few seconds. :-)

Angier=20 Ames
N4ZQ
35hrs

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