X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 31 Oct 2007 17:47:33 -0400 Message-ID: X-Original-Return-Path: Received: from mx1.timesync.com ([12.181.175.91] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2441857 for lml@lancaironline.net; Wed, 31 Oct 2007 13:17:45 -0400 Received-SPF: none receiver=logan.com; client-ip=12.181.175.91; envelope-from=schroder@timesync.com Received: from antares.timesync.com (antares.timesync.com [12.181.175.25]) by mx1.timesync.com (Postfix) with ESMTP id 2503F6781C for ; Wed, 31 Oct 2007 10:02:54 -0700 (PDT) Received: from DAVEAE066C3A9B [207.118.50.207] by antares.timesync.com with ESMTP (SMTPD-8.22) id A89103C8; Wed, 31 Oct 2007 09:17:05 -0800 X-Original-Message-ID: <002901c81be1$df700070$6401a8c0@DAVEAE066C3A9B> From: "Dave Schroder" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: Gear cylinder hydraulic gaskets X-Original-Date: Wed, 31 Oct 2007 10:17:10 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0026_01C81BA7.32B1CA60" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0026_01C81BA7.32B1CA60 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Mario and Terrance, Better yet, why not a manual retract system like the early Mooneys? dave ----- Original Message -----=20 From: terrence o'neill=20 To: lml@lancaironline.net=20 Sent: 10/30/2007 2:03 PM Subject: [LML] Re: Gear cylinder hydraulic gaskets Mario, Sounds like an excellent idea. Neat, compact linear actuators with = built-in adjustment, available from robotics spinoffs... not expensive.=20 Eliminate much time/labor? Replace the switches, sequencers, = limiters, many-piece-lines, pump, etc., with three actuators and one = up-down switch? Wouldn' be re-inventing the wheel (gear). I heard the 10,000 Bell = P-39, -63, -59s were electric gears. Terrence LNC2 N211AL ----- Original Message -----=20 From: Mario Gonzalez=20 To: lml@lancaironline.net=20 Sent: Tuesday, October 30, 2007 07:27 AM Subject: [LML] Re: Gear cylinder hydraulic gaskets Hello, =20 Just a thought, has anyone on the list researched if with the new = electric motors and batteries available today one could build an = electric gear retract system, maybe like the garage door oppeners kind = of thing technology?.=20 =20 No more leaks here and there get rid of complexity of a = mechanical/hydraulic system, no more pistons, gaskets, pumps etc. =20 Mario LNC2 -------------------------------------------------------------------------= - To: lml@lancaironline.net Date: Mon, 29 Oct 2007 15:35:01 -0400 From: matt.hapgood@alumni.duke.edu Subject: [LML] Re: Gear cylinder hydraulic gaskets Wonderful. I did the EXACT same thing in May. Rebuilt all three = gear cylinders due to 1 slight leak. Result. Massive hydraulic leak = problems that persist to this day. I=92ve now replaced two entire = cylinders and may need to replace the third=85 =20 I=92m at a loss, frustrated, and in desperate need of a shop in = the southeast that will help me TROUBLEshoot the problem (as opposed to = continually replacing cylinders). Matt From: Lancair Mailing List [mailto:lml@lancaironline.net] On = Behalf Of kneaded pleasures Sent: Monday, October 29, 2007 1:59 PM To: lml@lancaironline.net Subject: [LML] Gear cylinder hydraulic gaskets Matt Reeves wrote back in late August: "I have a Lancair 320. I just found a leak coming out of the end = of the left main hydraulic cyl on the high side. It is not coming out = of the fittings, it's actually coming out of the end where the stop jam = is. It's just a small leak but I rebuilt this cylinder once already = cause I thought there was an internal leak so my opinion is this is a = defective cylinder." Matt: The problem is probably not with the cylinder - or your = workmanship! It is probably due to a wrong piston gasket being included = in the cylinder rebuild kit. I had an identical problem with one = cylinder and chose to rebuild all three gear cylinders at the same time. = After ordering rebuild kits (just gaskets in the kits) I installed the = new gaskets and two leaked after rebuild. I removed them and critically = reexamined the supplied materials and my workmanship. (Meanwhile, I = reordered from Lancair two more gasket kits.) I then noted that the = newly-supplied leaking gaskets differed from both the very old rotted = gaskets that I had originally removed and also differed from the two = newest gaskets that I had just received from Kit Components. (The = gasket that I am targeting here is the gasket that surrounds the piston = as it extends/withdraws from the cylinder.)=20 The differences in these gaskets are easy too see and measure. = The new and correct gaskets are the same as the very-old, original and = now rotted gaskets. They have an O-ring embedded inside of the = plasticized gasket. {I "dis-sected" (the word is not "di-sected") an old = gasket to observe this.} Writing on the good/proper/desired gasket is = illegible to me. However, writing is very clear on the IMPROPER gasket = and it reads, "USA .375 MP I K3E.1". Further, the = good/non-leaking gasket stands noticeably higher on a flat surface - = perhaps four or five mils higher than the poor/leaking gasket (probably = important at 2000 psi). Summarizing, don't throw away your leaking cylinders before you = first check to ensure that the correct replacement gasket is installed. = Look for the tell-tail embedded "O ring" that is prominently visible on = the top of the correct gasket. Greg Nelson=20 -------------------------------------------------------------------------= --- Windows Live Hotmail and Microsoft Office Outlook =96 together at = last. Get it now!=20 __________ NOD32 2630 (20071031) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com ------=_NextPart_000_0026_01C81BA7.32B1CA60 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Mario and Terrance,
Better yet, why not a manual retract system like = the early=20 Mooneys?
dave
----- Original Message -----
From:=20 terrence=20 o'neill
Sent: 10/30/2007 2:03 PM
Subject: [LML] Re: Gear = cylinder=20 hydraulic gaskets

Mario,
Sounds like an excellent = idea. =20 Neat, compact linear actuators with built-in adjustment, = available from=20 robotics spinoffs... not expensive.
Eliminate much = time/labor? =20 Replace the switches, = sequencers,=20 limiters, many-piece-lines, pump, etc., with three actuators and one = up-down=20 switch?
Wouldn' be re-inventing = the wheel=20 (gear).  I heard = the 10,000=20 Bell P-39, -63, -59s were electric gears.
 
Terrence LNC2 = N211AL
----- Original Message -----
From:=20 Mario=20 Gonzalez
Sent: Tuesday, October 30, = 2007 07:27=20 AM
Subject: [LML] Re: Gear = cylinder=20 hydraulic gaskets

Hello,
 
Just a thought, has anyone on the = list=20 researched if with the new electric motors and batteries available = today one=20 could build an electric gear retract system, maybe like the garage = door=20 oppeners kind of thing technology?.
 
No more leaks = here=20 and there get rid of complexity of a mechanical/hydraulic system, no = more=20 pistons, gaskets, pumps etc.
 
Mario LNC2

To: lml@lancaironline.net
Date: Mon, 29 Oct 2007 15:35:01=20 -0400
From: matt.hapgood@alumni.duke.edu
Subject: [LML] Re: = Gear=20 cylinder hydraulic gaskets

Wonderful. =20 I did the EXACT same thing in May.  Rebuilt all three gear = cylinders=20 due to 1 slight leak.  Result.  Massive hydraulic leak = problems=20 that persist to this day.  I=92ve now replaced two entire = cylinders and=20 may need to replace the third=85 

 

I=92m=20 at a loss, frustrated, and in desperate need of a shop in the = southeast=20 that will help me TROUBLEshoot the problem (as opposed to = continually=20 replacing cylinders).

 

Matt

 

From: = Lancair=20 Mailing List [mailto:lml@lancaironline.net] On Behalf Of = kneaded=20 pleasures
Sent: Monday, October 29, 2007 1:59 = PM
To:=20 lml@lancaironline.net
Subject: [LML] Gear cylinder = hydraulic=20 gaskets

 

Matt Reeves wrote back in late = August:

 

"I have a Lancair 320.  I just found = a leak=20 coming out of the end of the left main hydraulic cyl on the high=20 side.  It is not coming out of the fittings, it's actually = coming out=20 of the end where the stop jam is.   It's just = a small=20 leak but I rebuilt this cylinder once already cause I thought = there=20 was an internal leak so my opinion is this is a defective=20 cylinder."

 

Matt:  The problem is probably not = with the=20 cylinder - or your workmanship!  It is probably due to a = wrong=20 piston gasket being included in the cylinder rebuild = kit.  I had=20 an identical problem with one cylinder and chose to rebuild all = three gear=20 cylinders at the same time.  After ordering rebuild kits = (just=20 gaskets in the kits) I installed the new gaskets and two leaked=20 after rebuild.  I removed them and critically reexamined = the=20 supplied materials and my workmanship. (Meanwhile, I = reordered from=20 Lancair two more gasket kits.) I then noted that the=20 newly-supplied leaking gaskets differed from both the very old = rotted=20 gaskets that I had originally removed and also differed from=20 the two newest gaskets that I had just received from Kit = Components.  (The gasket that I am targeting here is=20 the gasket that surrounds the piston as it extends/withdraws = from the=20 cylinder.) 

 

The differences in these gaskets are easy = too see=20 and measure.  The new and correct gaskets are the same as the = very-old, original and now rotted gaskets.  They = have an=20 O-ring embedded inside of the plasticized gasket. {I = "dis-sected"=20 (the word is not "di-sected") an old gasket to observe = this.} =20 Writing on the good/proper/desired gasket is illegible to = me. =20 However, writing is very clear on the IMPROPER gasket and it = reads,=20 "USA   .375   MP I   =20  K3E.1".  Further, the good/non-leaking gasket = stands=20 noticeably higher on a flat surface - perhaps four or five mils = higher=20 than the poor/leaking gasket (probably important at 2000 = psi).

 

Summarizing, don't throw away your leaking = cylinders=20 before you first check to ensure that the correct replacement = gasket is=20 installed.  Look for the tell-tail embedded "O ring" that is=20 prominently visible on the top of the correct=20 gasket.     Greg=20 Nelson 


Windows Live Hotmail and Microsoft Office Outlook =96 together at = last. Get it now!

__________ NOD32 = 2630=20 (20071031) Information __________

This message was checked by = NOD32=20 antivirus system.
http://www.eset.com
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