X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 01 Apr 2007 13:41:25 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m21.mx.aol.com ([64.12.137.2] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1960872 for lml@lancaironline.net; Sun, 01 Apr 2007 12:30:45 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.2; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m21.mx.aol.com (mail_out_v38_r7.10.) id q.ce0.e2a287f (29673) for ; Sun, 1 Apr 2007 12:29:48 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Sun, 1 Apr 2007 12:29:48 EDT Subject: Re: [LML] Lancair IVP Wing...Unuseable Fuel Quantity? X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1175444988" X-Mailer: 9.0 Security Edition for Windows sub 5361 X-Spam-Flag: NO -------------------------------1175444988 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 4/1/2007 11:08:57 A.M. Central Daylight Time, liegner@earthlink.net writes: What amount have people found is UNUSEABLE FUEL in these wings. 5 gals? 10 gals? more (per side)? I'll be exploring this topic soon, and would like to post the question for others before I wait patiently for a dry tank. Jeff, Consider at least 4 conditions, three of them can be tested on the ground. 1. Level as in level un-accelerated cruise flight. 2. X degrees nose down attitude that might be used in straight line extreme descents with air brakes and perhaps gear extended. This condition can be fixed temporarily by reducing X or switching to a fuller tank if the measurement device is accurate in such an attitude. 3. X degrees nose up attitude used in straight Vx or Vy climbs. See # 2. 4. Slip/skid extended flight to test the size and seal of the slosh chamber when the wing fuel is "low". Most "ball out" flight is done at low power so the fuel draw is reduced. Items 1, 2 and 3 could be tested on the ground with the wings attached (hard) or a jig could be built to test just the wing by holding the proper dihedral and incidence. Water and a pump could be used to find when the fluid would become un-ported. Then it is just a matter of measuring how much fluid was present when the un-porting occurred. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Darwinian culling phrase: Watch This! ************************************** See what's free at http://www.aol.com. -------------------------------1175444988 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 4/1/2007 11:08:57 A.M. Central Daylight Time,=20 liegner@earthlink.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>What=20 amount have people found is UNUSEABLE FUEL in these wings. 5=20
gals? 10 gals? more (per side)?

I'll be exploring t= his=20 topic soon, and would like to post the
question for others before I wa= it=20 patiently for a dry tank.

Jeff,

Consider at least 4 conditions, three of them can be tested on the= =20 ground.

1. Level as in level un-accelerated cruise flight.

2. X degrees nose down attitude that might be used in straight=20 line extreme descents with air brakes and perhaps gear extended. =20 This condition can be fixed temporarily by reducing X or switching= to=20 a fuller tank if the measurement device is accurate in such an attitude.&nbs= p;=20

3. X degrees nose up attitude used in straight Vx or Vy climbs.&nb= sp;=20 See # 2.

4. Slip/skid extended flight to test the size and seal of the slosh cha= mber=20 when the wing fuel is "low". Most "ball out" flight is done at low pow= er=20 so the fuel draw is reduced.

Items 1, 2 and 3 could be tested on the ground with the wings atta= ched=20 (hard) or a jig could be built to test just the wing by holding the proper=20 dihedral and incidence. Water and a pump could be used to find wh= en=20 the fluid would become un-ported. Then it is just a matter of measurin= g=20 how much fluid was present when the un-porting occurred.=20

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Darwinian culling phrase: Watch=20 This!

See wha= t's free at AOL.co= m.

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