X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 11 Jan 2012 10:13:23 -0500 Message-ID: X-Original-Return-Path: Received: from carbinge.com ([69.5.27.218] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with SMTP id 5346037 for lml@lancaironline.net; Wed, 11 Jan 2012 09:47:26 -0500 Received-SPF: none receiver=logan.com; client-ip=69.5.27.218; envelope-from=jbarrett@carbinge.com Received: (qmail 29907 invoked from network); 11 Jan 2012 14:46:52 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; h=X-Originating-IP:Reply-To:From:To:References:In-Reply-To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language; s=default; d=carbinge.com; b=Sg3XVVOWZlbtvGlDN82kXVcUy/BO0d30qNRyc9jbKj8Defd2rY31OgERDjUX2W18IvJrwjCyVtt+1Re9lEM0W7WK8BogfodjB0ySpnGVTp5hurNjglBuYQjNlvfRhfT2AEZJLKgVkgoRItRfyS/qhB7JdoykTaHymm/6Ucaaqy4=; X-Originating-IP: [24.143.115.170] Reply-To: From: "John Barrett" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: Pitot static checks X-Original-Date: Wed, 11 Jan 2012 06:46:56 -0800 X-Original-Message-ID: <04d801ccd06f$de585560$9b090020$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_04D9_01CCD02C.D0351560" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AczQUncKL/hlfY+6TFm/VMpgkhsiggAHK0qA Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_04D9_01CCD02C.D0351560 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Chris, =20 I actually have one of these pumps already. Is it safe to use on = instruments? How do you know max vacuum to apply? Do you simply read = it on the aircraft altimeter while you=E2=80=99re doing the test? Can I = assume that if I don=E2=80=99t go over 10,000 feet, say, that will be = sufficient and at the same time not destructive? How to keep from = damage when I take the altimeter out of the system? =20 I have Tru Trak autopilot, Cheltons and steam gauge backups. =20 Thanks, John =20 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Chris Zavatson Sent: Wednesday, January 11, 2012 3:16 AM To: lml@lancaironline.net Subject: [LML] Re: Pitot static checks =20 John, I use a MightyVac hand help vacuum pump to check for leaks. It is = inexpensive and available at auto parts stores.=20 -very useful to have around after breaking into lines and especially to = verify system integrity before getting an official check done. Chris =20 Chris Zavatson N91CZ 360std www.N91CZ.net =20 =20 =20 From: John Barrett To: lml@lancaironline.net=20 Sent: Tuesday, January 10, 2012 9:55 AM Subject: [LML] Pitot static checks =20 I am having trouble with leaking Pitot system on my IVP. Attempts to = perform IFR cert for first flight indicate that leaks in the standby = altimeter and airspeed indicator are producing 750 fpm leaks -- not = acceptable. =20 =20 Have attempted to repair these with clear fingernail polish as advised = by Fred Moreno (thanks Fred) and this improved the situation from about = 3-4,000 fpm to the existing 750 fpm. Only trouble is I was not present = when the test was done this morning and to date my only recourse for = testing is to have the folks from Lancair avionics do a test and tell me = the results. I do not know now if the problem is isolated in these two = instruments or could be elsewhere because I don=E2=80=99t know if the = techs from Lancair made any attempts to insure the current leak was in = the instruments noted; only that they isolated them previously and felt = this was where the leaks were. =20 To round out my dilemma, I live on the Washington State Olympic = Peninsula and the airplane is in Redmond across the field from the old = Lancair factory. I have a 130 knot Beech Sierra I use to commute and = with the winter weather and my work schedule it=E2=80=99s unpredictable = when I can get to Redmond. =20 My question is does anyone have a testing system for checking out the = pitot static system and tracking down leaks so that I can repair them = and only invite Gary Lane back from Lancair avionics when I know the = system to be leak free? If there is a simple design that allows one to = assemble such a device that would be good. If someone has one made up = and would loan or rent it to me that would also be good. If I had = something like this I could narrow down the source or sources of leaks = and fix them systematically. =20 Thanks in advance. =20 Regards, =20 John Barrett, CEO Leading Edge Composites PO Box 428 Port Hadlock, WA 98339 =20 www.carbinge.com =20 =20 =20 ------=_NextPart_000_04D9_01CCD02C.D0351560 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Chris,

 

I actually have one of these pumps already.=C2=A0 Is it safe to use = on instruments?=C2=A0 How do you know max vacuum to apply?=C2=A0 Do you = simply read it on the aircraft altimeter while you=E2=80=99re doing the = test?=C2=A0 Can I assume that if I don=E2=80=99t go over 10,000 feet, = say, that will be sufficient and at the same time not destructive?=C2=A0 = How to keep from damage when I take the altimeter out of the = system?

 

I have Tru Trak autopilot, Cheltons and steam gauge = backups.

 

Thanks,

John

 

From:= = Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Chris Zavatson
Sent: Wednesday, January 11, 2012 3:16 = AM
To: lml@lancaironline.net
Subject: [LML] Re: = Pitot static checks

 

J= ohn,

I= use a MightyVac hand help vacuum pump to check for leaks.  It = is inexpensive and available at auto parts = stores. 

-= very useful to have around after breaking into lines = and especially to verify system integrity before getting an = official check done.

C= hris

&= nbsp;

C= hris Zavatson

N= 91CZ

3= 60std

<= a = href=3D"http://www.n91cz.net/">www.N91CZ.net

&= nbsp;

<= o:p> 

F= rom: = John Barrett <jbarrett@carbinge.com>
To: = lml@lancaironline.net
Sent: Tuesday, January 10, 2012 9:55 = AM
Subject: [LML] Pitot static checks

 

I am having = trouble with leaking Pitot system  on my IVP.  Attempts to = perform IFR cert for first flight  indicate that leaks in the = standby altimeter and airspeed indicator are producing 750 fpm leaks -- = not acceptable. 

 

Have attempted to repair these with clear = fingernail polish as advised by Fred Moreno (thanks Fred) and this = improved the situation from about 3-4,000 fpm to the existing 750 fpm. =  Only trouble is I was not present when the test was done this = morning and to date my only recourse for testing is to have the folks = from Lancair avionics do a test and tell me the results.  I = do  not know now if the problem is isolated in these two = instruments or could be elsewhere because I don=E2=80=99t know if the = techs from Lancair made any  attempts to insure the current leak = was in the instruments noted; only that they isolated them previously = and felt this was where the leaks = were.

 

To round out my dilemma, I live on the Washington = State  Olympic Peninsula and the airplane is in Redmond across the = field from the old Lancair factory.  I have a 130 knot Beech Sierra = I use to commute and with the winter weather and my work schedule = it=E2=80=99s unpredictable when I can get to = Redmond.

 

My question is does anyone have a testing system = for checking out the pitot static system  and tracking down leaks = so that I can repair them and only  invite Gary Lane back from = Lancair avionics when I know the system to be leak free?  If there = is a simple design that allows one to assemble such a device that would = be good.  If someone has one made up and would loan or rent it to = me that would also be good.  If I had something like this I could = narrow down the source or sources of leaks and fix them = systematically.

 

Thanks in = advance.

 

Regards,

 

John Barrett, = CEO

Leading Edge = Composites

PO Box = 428

Port Hadlock, WA = 98339

 

 

 

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