X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Tue, 29 Aug 2006 15:25:04 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d21.mx.aol.com ([205.188.144.207] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1354324 for lml@lancaironline.net; Tue, 29 Aug 2006 09:12:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.207; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d21.mx.aol.com (mail_out_v38_r7.6.) id q.37f.a1cf029 (57365) for ; Tue, 29 Aug 2006 09:11:30 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <37f.a1cf029.32259702@aol.com> X-Original-Date: Tue, 29 Aug 2006 09:11:30 EDT Subject: Re: [LML] Pitot-Statics X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1156857090" X-Mailer: 9.0 Security Edition for Windows sub 5330 X-Spam-Flag: NO -------------------------------1156857090 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 8/29/2006 12:03:06 A.M. Central Standard Time, rosenzweig2@verizon.net writes: I was recently tracking down a pitot leak. Turns out I have some kind of valve or sensor (that has two wires connected to it) that is T'eed between the pitot and static systems. I've verified this happens to be where my leak is. But what the heck is it that would be plummed between pitot and static side? Anybody venture a guess. Steve, No guess as that is usually the "squat" switch. It should not allow the landing gear to be retracted if it senses an airspeed of less than 70 Knots. It is a pressure switch with normally open contacts that are closed when the pressure differential between pitot and static would be the equivalent of that at 70 Knots. Is the leak internal to the switch? Or, is the leak just at the pitot/device connection. If it is internal, I suggest you repair or replace the device. Does it look like the gold colored contraption in the middle of this AeroCrafters catalog (search: squat switch) : Pitot Static System, 24-28 volt Contains pitot tube, squat switch and all the fittings and tubing required to install the pitot-static system in a Retract gear, 2 seat plane. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Everything in moderation. -------------------------------1156857090 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 8/29/2006 12:03:06 A.M. Central Standard Time,=20 rosenzweig2@verizon.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>I was=20 recently tracking down a pitot leak. Turns out I have some kind of v= alve=20 or sensor (that has two wires connected to it) that is T'eed between the p= itot=20 and static systems. I've verified this happens to be where my leak=20 is. But what the heck is it that would be plummed between pitot and=20 static side? Anybody venture a guess.
=

Steve,

No guess as that is usually the "squat" switch. It should not all= ow=20 the landing gear to be retracted if it senses an airspeed of less than=20= 70=20 Knots. It is a pressure switch with normally open contacts that=20= are=20 closed when the pressure differential between pitot and static would be the=20 equivalent of that at 70 Knots.

Is the leak internal to the switch? Or, is the leak just at=20= the=20 pitot/device connection. If it is internal, I suggest you repair or=20 replace the device.

Does it look like the gold colored contraption in the middle of this=20 AeroCrafters catalog (search: squat switch) :

Pitot Static System, 24= -28=20 volt

Contains pitot tu= be,=20 squat switch and all the fittings and tubing required to install the=20 pitot-static system in a Retract gear, 2 seat plane.

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

Everything in moderation.

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