X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 08 Feb 2008 15:13:56 -0500 Message-ID: X-Original-Return-Path: Received: from ncsusraimgo02.na.jnj.com ([148.177.2.33] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTPS id 2720994 for lml@lancaironline.net; Fri, 08 Feb 2008 09:40:56 -0500 Received-SPF: none receiver=logan.com; client-ip=148.177.2.33; envelope-from=GLaznic@MCCUS.JNJ.com X-IronPort-AV: E=Sophos;i="4.25,322,1199682000"; d="scan'208,217";a="137429931" Received: from unknown (HELO JNJUSRAGMH01.na.jnj.com) ([10.35.55.202]) by ncsusraimgo02-int.na.jnj.com with ESMTP; 08 Feb 2008 09:32:00 -0500 Received: from JNJUSFWGMS01.na.jnj.com ([10.2.16.161]) by JNJUSRAGMH01.na.jnj.com with Microsoft SMTPSVC(6.0.3790.1830); Fri, 8 Feb 2008 09:40:14 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C86A60.83E9FBB4" Subject: RE: [LML] 235/320/360 gear dump valve idea X-Original-Date: Fri, 8 Feb 2008 09:40:14 -0500 X-Original-Message-ID: <38135B63A445784D8F3C3C80CDFB3EEE014D631A@JNJUSFWGMS01.na.jnj.com> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] 235/320/360 gear dump valve idea Thread-Index: AchqYIO9iHOck9qTQtCJg2cHwMPB0A== From: "Laznicka, Garry [MCCUS]" X-Original-To: "LHenney" , X-Original-Return-Path: GLaznic@MCCUS.JNJ.com X-OriginalArrivalTime: 08 Feb 2008 14:40:14.0487 (UTC) FILETIME=[840C6A70:01C86A60] This is a multi-part message in MIME format. ------_=_NextPart_001_01C86A60.83E9FBB4 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Larry, =20 Would you be able to publish a sketch of the 1/4" tubing idea from third = port? =20 Regards, Garry V. Laznicka N360GL L-36Oc MK-II 85% -----Original Message----- From: LHenney [mailto:LHenney@charter.net] Sent: Thursday, February 07, 2008 1:34 PM To: lml@lancaironline.net Subject: FW: [LML] 235/320/360 gear dump valve idea Randy, =20 Hold off on the machine work. Your pump is designed with a third port = (between the two now in use). It is threaded and ready for your return = line. A =BC " tubing can be installed as a down tube in the tank (mine = came with the tube installed). =20 Also, Randy Stuarts idea of a T shuttle sounds very, very interesting. = I don't completely know what a T shuttle valve is however. Thus, I'm = grappling with check valve analogies and getting a lot of "how would = that work?" thoughts. Does this mean pressure on up circuit triggers = opening of shuttle from down circuit, therefore T goes to third port??? = I'm tempted to like this idea. Additionally, could second T also tie in = to third port and allow 3 way dump common path to reservoir. Please = tell us more R. Stuart..... =20 Larry Henney N360LH Much less chirping lately after changing out pump O rings; Lancair also = got more pressure gauges in stock and shipped mine. =20 _____ =20 From: Sky2high@aol.com [mailto:Sky2high@aol.com]=20 Sent: Wednesday, February 06, 2008 2:49 PM To: lml@lancaironline.net Subject: Re: [LML] 235/320/360 gear dump valve idea =20 Randy, =20 Remember that the reservoir needs a small vent hole so that air pressure = or vacuum does not build up in the reservoir itself. Usually the vent = is in the filler cap or its threads. =20 Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Pilot not TSO'd, Certificated score only > 70%. =20 =20 In a message dated 2/6/2008 11:29:13 A.M. Central Standard Time, = randylsnarr@yahoo.com writes: With the way the hydraulic system is currently designed, you equalize = the pressure on the high and low sides when it is opened. For those of = us who have pressure gauges, you can see that you can have significant = pressure on the system even when the valve is opened. I want to be able = to not only equalize the pressure between the high and low sides of the = hydraulic system with the dump valve but also release the pressure on = both sides. Today I purchased a 3 way valve to do just that. The idea is to open = the valve connecting the high and low sides and also releasing the = pressure back to the tank. I will most likely run a low pressure line like nylaflow back to the = pump and make spin up a custom fitting on the lathe out of aluminum to = go into the dipstick hole and terminate the return line there. I will = make a needle dipstick checker that will screw into the same fitting for = checking fluid level. If you wanted to do it the easy way, you could always just dump the low = pressure line out the belly of the airplane onto the ground. It would = take very little fluid to drop the pressure and there would be no need = to deal with connecting the low pressure fluid line to the tank. I hate pulling the airplane out of a cool hanger into the warm sunshine = and watching the gear pressures rise to 6-700 lbs before the master = switch is turned on! We all know what happens when they hit 900. Yep no = gear retraction as the upper limit has been tripped by the system = pressure.=20 My new valve would fix that!!! I hope... =20 _____ =20 Who's never won? Biggest Grammy Award surprises of all time on AOL = Music. ------_=_NextPart_001_01C86A60.83E9FBB4 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Larry,
 
Would=20 you be able to publish a sketch of the 1/4" tubing idea from third=20 port?
 
Regards,
Garry=20 V. Laznicka
N360GL
L-36Oc=20 MK-II 85%
-----Original Message-----
From: LHenney=20 [mailto:LHenney@charter.net]
Sent: Thursday, February 07, = 2008 1:34=20 PM
To: lml@lancaironline.net
Subject: FW: [LML]=20 235/320/360 gear dump valve idea

Randy,

 

Hold off on = the=20 machine work.  Your pump is designed with a third port (between = the two=20 now in use).  It is threaded and ready for your return = line.  A =BC “=20 tubing can be installed as a down tube in the tank (mine came with the = tube=20 installed).

 

Also, Randy = Stuarts=20 idea of a T shuttle sounds very, very interesting.  I don’t = completely=20 know what a T shuttle valve is however.  Thus, I’m = grappling with check=20 valve analogies and getting a lot of “how would that = work?” thoughts.=20   Does this mean pressure on up circuit triggers opening of = shuttle=20 from down circuit, therefore T goes to third port???  I’m = tempted to like=20 this idea.  Additionally, could second T also tie in to third = port and=20 allow 3 way dump common path to reservoir.  Please tell us more = R.=20 Stuart…..

 

Larry=20 Henney

N360LH

Much less = chirping=20 lately after changing out pump O rings; Lancair also got more pressure = gauges=20 in stock and shipped mine.

 

From:=20 Sky2high@aol.com [mailto:Sky2high@aol.com]
Sent: Wednesday, February 06, = 2008 2:49=20 PM
To:=20 lml@lancaironline.net
Subject: Re: [LML] 235/320/360 = gear dump=20 valve idea

 

Randy,

 

Remember = that the=20 reservoir needs a small vent hole so that air pressure or vacuum does = not=20 build up in the reservoir itself.  Usually the vent is in the = filler cap=20 or its threads.

 

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

Pilot not TSO'd, Certificated score only >=20 70%.

 

 

In a = message dated=20 2/6/2008 11:29:13 A.M. Central Standard Time, randylsnarr@yahoo.com=20 writes:

With the = way the=20 hydraulic system is currently designed, you equalize the pressure on = the=20 high and low sides when it is opened. For those of us who have = pressure=20 gauges, you can see that you can have significant pressure on the = system=20 even when the valve is opened. I want to be able to not only = equalize the=20 pressure between the high and low sides of the hydraulic system with = the=20 dump valve but also release the pressure on both sides.

Today = I=20 purchased a 3 way valve to do just that. The idea  is to open = the=20 valve  connecting  the high and low sides and also = releasing the=20 pressure back to the tank.
I will most likely run a low pressure = line=20 like nylaflow back to the pump and make spin up a custom fitting on = the=20 lathe out of aluminum to go into the dipstick hole and terminate the = return=20 line there. I will make a needle dipstick checker that will screw = into the=20 same fitting for checking fluid level.
If you wanted to do it the = easy=20 way, you could always just dump the low pressure line out the belly = of the=20 airplane onto the ground. It would take very little fluid to drop = the=20 pressure and there would be no need to deal with connecting the low = pressure=20 fluid line to the tank.

I hate pulling the airplane out of a = cool=20 hanger into the warm sunshine and watching the gear pressures rise = to 6-700=20 lbs before the master switch is turned on! We all know what happens = when=20 they hit 900. Yep no gear retraction as the upper limit has been = tripped by=20 the system pressure.
My new valve would fix that!!!
I=20 hope...

 



Who's=20 never won? Biggest Grammy Award surprises of all time on AOL=20 = Music.

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