X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 29 Jan 2013 07:53:48 -0500 Message-ID: X-Original-Return-Path: Received: from mail.glasair.org ([65.75.24.102] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6034249 for lml@lancaironline.net; Tue, 29 Jan 2013 00:40:45 -0500 Received-SPF: none receiver=logan.com; client-ip=65.75.24.102; envelope-from=BGray@glasair.org Received: from gray1 by mail.glasair.org (VisNetic.MailServer.v9.1.4.1) with ESMTP id OGR35910 for ; Tue, 29 Jan 2013 00:40:10 -0500 From: "Bruce" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Re: hydraulic pump/reservoir in IVP X-Original-Date: Tue, 29 Jan 2013 00:40:09 -0500 X-Original-Message-ID: <55DE95B8A2664C7EAFF030B4A6761676@gray1> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D9_01CDFDB9.3103EB90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_00D9_01CDFDB9.3103EB90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit You're right, if you have a line or cylinder leak downwind of the hand pump, the hand pump will do you no good. That's why I'm glad my Glasair III has separate lines and hydraulic cylinders downwind of the handpump. Bruce WWW.Glasair.org -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Robert R Pastusek Sent: Tuesday, January 29, 2013 12:11 AM To: lml@lancaironline.net Subject: [LML] Re: hydraulic pump/reservoir in IVP Laurie Fitzgerald (Australia) advises that while the manual pump can compensate for an electric pump failure, it will likely only help you dump the remaining hydraulic fluid overboard in the event of a leak. I agree with this assessment.for leaks within most of the IV/IV-P hydraulic system. Laurie further advises that he's working on an improvement. If he successfully figures this out, we'd be pleased to publish it to LML and LOBO followers. Bob From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of John Barrett Sent: Monday, January 28, 2013 10:40 AM To: lml@lancaironline.net Subject: [LML] Re: hydraulic pump/reservoir in IVP Thanks Bob, And that's a great idea for the dip stick. As I recall the overflow vent was called for in the plans and I have that feature. John From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Robert R Pastusek Sent: Monday, January 28, 2013 6:28 AM To: lml@lancaironline.net Subject: [LML] Re: hydraulic pump/reservoir in IVP John Barrett wrote: Anyone know the capacity of the reservoir? I measured the box roughly and got 6"X6"X6.5". Don't know the displacement of the internal parts that go inside the tank. An even more important question is how full to fill the tank? All the way or some measurement below the top? John, I'd recommend you leave at least an inch of airspace at the top of the reservoir; 2" is better. This allows for thermal expansion and to accommodate any air that might get into the system. It's also important that the tank be vented as shown in the building diagrams.for the same reason. The volume in the reservoir doesn't change appreciably during operation of the gear and flaps. Also note that the tank has a pickup for the emergency extension hand pump that is lower than the normal pump pickup. This allows the emergency pump to draw oil for gear extension after the electric pump has pumped all it can overboard in the event of a leak. I made a very simple "dip stick" for the reservoir by drilling the fill plug from the inside for a length of 1/8" aluminum pipe, and bonding the tubing in the plug with JB Weld. Then mark the dip stick for the max and min levels you'd like. Do this easily by crimping the tube gently to mark it with a pair of side cutters. Works well. Bob ------=_NextPart_000_00D9_01CDFDB9.3103EB90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

You’re right, if you have a = line or cylinder leak downwind of the hand pump, the hand pump will do you no = good. That’s why I’m glad my Glasair III has separate lines and hydraulic = cylinders downwind of the handpump.

 

Bruce
WWW.Glasair.org

-----Original Message-----
From: Lancair Mailing = List [mailto:lml@lancaironline.net] On = Behalf Of Robert R Pastusek
Sent: Tuesday, January = 29, 2013 12:11 AM
To: = lml@lancaironline.net
Subject: [LML] Re: = hydraulic pump/reservoir in IVP

 

Laurie = Fitzgerald (Australia) advises that while the manual pump can compensate for an = electric pump failure, it will likely only help you dump the remaining hydraulic = fluid overboard in the event of a leak. I agree with this assessment…for = leaks within most of the IV/IV-P hydraulic system. Laurie further advises that he’s working on an improvement. If he successfully figures this = out, we’d be pleased to publish it to LML and LOBO = followers.

 <= /p>

Bob

=

 <= /p>

 <= /p>

From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of John Barrett
Sent: Monday, January 28, = 2013 10:40 AM
To: = lml@lancaironline.net
Subject: [LML] Re: = hydraulic pump/reservoir in IVP

 

Thanks = Bob,

 <= /p>

And = that’s a great idea for the dip stick.  As I recall the overflow vent was = called for in the plans and I have that feature.

 <= /p>

John

 <= /p>

From: Lancair Mailing List [mailto:lml@lancaironline.net] = On Behalf Of Robert R Pastusek
Sent: Monday, January 28, = 2013 6:28 AM
To: lml@lancaironline.net
Subject: [LML] Re: = hydraulic pump/reservoir in IVP

 

John = Barrett wrote:

 

Anyone know the capacity of the = reservoir?  I measured the box roughly and got 6”X6”X6.5”.  Don’t know the displacement of the internal parts that go inside = the tank.

 

An even more important question is how full = to fill the tank?  All the way or some measurement below the = top?

 <= /p>

 <= /p>

John,

 <= /p>

I’d = recommend you leave at least an inch of airspace at the top of the reservoir; = 2” is better. This allows for thermal expansion and to accommodate any air = that might get into the system. It’s also important that the tank be vented = as shown in the building diagrams…for the same reason. The volume in the = reservoir doesn’t change appreciably during operation of the gear and flaps. = Also note that the tank has a pickup for the emergency extension hand pump = that is lower than the normal pump pickup. This allows the emergency pump to = draw oil for gear extension after the electric pump has pumped all it can = overboard in the event of a leak.

 <= /p>

I made a = very simple “dip stick” for the reservoir by drilling the fill plug from = the inside for a length of 1/8” aluminum pipe, and bonding the tubing = in the plug with JB Weld. Then mark the dip stick for the max and min levels you’d like. Do this easily by crimping the tube gently to mark it = with a pair of side cutters.


Works well…


Bob

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