X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 18 Oct 2011 12:02:37 -0400 Message-ID: X-Original-Return-Path: Received: from mail.grobsystems.com ([74.218.59.19] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTP id 5161210 for lml@lancaironline.net; Tue, 18 Oct 2011 10:45:46 -0400 Received-SPF: none receiver=logan.com; client-ip=74.218.59.19; envelope-from=btv1==272babcb5c4==bronnenmeier@grobsystems.com X-ASG-Debug-ID: 1318949102-319d67aa0001-yPXFKn Received: from bluexch01.grob.local ([10.10.0.103]) by mail.grobsystems.com with ESMTP id EpGhcERmWv3RiNpd for ; Tue, 18 Oct 2011 10:45:02 -0400 (EDT) X-Barracuda-Envelope-From: bronnenmeier@GROBSYSTEMS.COM X-ASG-Whitelist: Client Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CC8DA4.8458E594" X-MimeOLE: Produced By Microsoft Exchange V6.5 Subject: RE: [LML] Re: Gear Hand Pump LIV X-Original-Date: Tue, 18 Oct 2011 10:45:02 -0400 X-ASG-Orig-Subj: RE: [LML] Re: Gear Hand Pump LIV X-Original-Message-ID: <03E004EAF5B4DC4186EDF0995C9FE571B81C0B@bluexch01.grob.local> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Re: Gear Hand Pump LIV Thread-Index: AcyNkJe5uOCspKXsQrO/He9pz6B7dA== From: X-Original-To: X-Barracuda-Connect: UNKNOWN[10.10.0.103] X-Barracuda-Start-Time: 1318949102 X-Barracuda-URL: http://74.218.59.19:80/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at grobsystems.com This is a multi-part message in MIME format. ------_=_NextPart_001_01CC8DA4.8458E594 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I did not calculate this. But the thread looks very tiny to me (in relation to the tube). If you do not every time completely screw in the male piece you get a bending momentum on the thread. With the fairly long arm of the pump handle and the quite high hand force to lock the gear you will get a quite large bending momentum on this thread which will bend it in the beginning and then might lead to failure. Like I said I did not calculate it - the proportions just did not look beautiful to me (my professor used to say: if a design looks beautiful (in regards to proportions) it is most likely good... If it has to be a two piece design I would take a piece of tube (2" long) that fits tight on the outside or inside (with a thicker wall then) on or inside the cut off pieces and weld it to the removable piece. To pump (in case you find the handle at night) you just stick it on Ralf =20 From: vtailjeff@aol.com [mailto:vtailjeff@aol.com]=20 Sent: Monday, October 17, 2011 2:00 PM To: lml@lancaironline.net Subject: Re: [LML] Re: Gear Hand Pump LIV =20 Its night time.... you are IMC shooting an instrument approach and the gear does not come down...where the hell is that handle? -----Original Message----- From: jeffrey liegner To: lml Sent: Mon, Oct 17, 2011 7:44 am Subject: [LML] Re: Gear Hand Pump LIV To: lml@lancaironline.net From: "Jeffrey Liegner, MD" Subject: Re: [LML] Re: Gear Hand Pump LIV Cc: "William A. Hogarty" Bcc:=20 X-Attachments: :Macintosh HD:402137:Gear Hand Pump LIV.1.jpg: :Macintosh HD:402137:Gear Hand Pump LIV.2.jpg: =20 Here's a basic camera photo of the Gear Hand Pump handle mod. =20 =20 re: Hydraullic pump mod: =20 Jeff: A picture of your mod would be appreciated. Also, what did the mod=20 cost.? =20 Thanks, Bill Hogarty =20 =20 On Thu, Sep 1, 2011 at 10:27 AM, <liegner@earthlink.net >=20 wrote: =20 =20 =20 Brad Simmons (talented professional builder in Milan TN) has shown me a modification to the gear handle that solved this problem. The leaking hydralics at the pump housing (which I had rebuilt three of four times to stop this) must come from these little bumps and wiggles occurring against the handle, permitting hydralic fluid to sneak past the seals. =20 Using a machinist, the handle is cut short leaving ~40% (coming off the pump), and a female fitting incorporated into the cut end. The other 60% handle (with the bulb on end) gets a long male screw mounted inside the hollow end. When screwed together, the handle is solid. The 60% handle then sits elsewhere (side pouch or behind the passenger front seat or cleated under the front spar lip). =20 This opens up the entire leg area previously blocked by the handle projecting out over the spar, and also significantly reduces the presence of the handle/pump profile sitting between the seats. Without the occasional bumps on the handle, small leakage from the pump seals seems to have stopped. =20 I sent my handle to Brad <dl60280@bellsouth.net >=20 and he returned it in two weeks machined and ready for reinstall. =20 Jeff Liegner LIVP in New Jersey =20 =20 =20 >=20 >To: lml@lancaironline.net =20 >From: "Nicholas Paczkowski" <npaczkowski@telus.net > >Subject: Gear Hand Pump LIV >=20 >Perhaps a dumb question (apologies in advance) but Is there a better >alternative available to the manually operated hydraulic 'gear down' >lever (such as a charged gas bottle) that would eliminate both the >awkward lever and the seemingly inevitable leaking of hydraulic >fluid? Thanks. =20 =20 -- For archives and unsub http://mail.lancai ronline.net:81/lists/lml/List.html =20 -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html =20 ------_=_NextPart_001_01CC8DA4.8458E594 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I did not calculate this. But the thread looks very tiny to me (in = relation to the tube). If you do not every time completely screw in the = male piece you get a bending momentum on the thread. With the fairly = long arm of the pump handle and the quite high hand force to lock the = gear  you will get a quite large bending momentum on this thread = which will bend it in the beginning and then might lead to failure. Like = I said I did not calculate it – the proportions just did not look = beautiful to me (my professor used to say: if a design looks beautiful = (in regards to proportions) it is most likely good… If it has to = be a two piece design I would take a piece of tube (2” long) that = fits tight on the outside or inside (with a thicker wall then) on or = inside the cut off pieces and weld it to the removable piece. To pump = (in case you find the handle at night) you just stick it = on

Ralf

 

From:= = vtailjeff@aol.com [mailto:vtailjeff@aol.com]
Sent: Monday, = October 17, 2011 2:00 PM
To: = lml@lancaironline.net
Subject: Re: [LML] Re: Gear Hand Pump = LIV

 

I= ts night time.... you are IMC shooting an instrument approach and the = gear does not come down...where the hell is that = handle?

-= ----Original Message-----
From: jeffrey liegner = <liegner@ptd.net>
To: lml = <lml@lancaironline.net>
Sent: Mon, Oct 17, 2011 7:44 = am
Subject: [LML] Re: Gear Hand Pump LIV

To: lml@lancaironline.net
From: "Jeffrey Liegner, MD" <liegner@embarqmail.com>
Subject: Re: [LML] Re: Gear Hand Pump =
LIV
Cc: =
"William A. Hogarty" <billhogarty@gmail.com><=
/o:p>
Bcc: 
X-Attachments: :Macintosh HD:402137:Gear Hand Pump =
LIV.1.jpg: :Macintosh 
HD:402137:Gear Hand Pump =
LIV.2.jpg:
 
Here's a =
basic camera photo of the Gear Hand Pump handle =
mod.
 
 
re:  =
Hydraullic pump mod:
 
Jeff:  A =
picture of your mod would be appreciated.  Also, what did the mod =

cost.?
 
Thanks, Bill =
Hogarty
 
 
On Thu, Sep =
1, 2011 at 10:27 AM, <<mailto:lie=
gner@earthlink.net>liegner@earthlink.net> =

wrote:
 
 
 
Brad Simmons =
(talented professional builder in Milan =
TN)
has shown me =
a modification to the
gear handle =
that solved this problem.  The leaking hydralics at =
the
pump housing =
(which I had rebuilt three of four times to stop =
this)
must come =
from these little bumps and wiggles occurring against =
the
handle, =
permitting hydralic fluid to sneak past the =
seals.
 
Using a =
machinist, the handle is cut short leaving ~40% (coming =
off
the pump), =
and a female fitting incorporated into the cut end. =
 The
other 60% =
handle (with the bulb on end) gets a long male =
screw
mounted =
inside the hollow end.  When screwed together, the handle =
is
solid.  The 60% handle then sits elsewhere =
(side pouch or behind the
passenger =
front seat or cleated under the front spar =
lip).
 
This opens up =
the entire leg area previously blocked by the =
handle
projecting =
out over the spar, and also significantly reduces =
the
presence of =
the handle/pump profile sitting between the =
seats.
Without the =
occasional bumps on the handle, small leakage from =
the
pump seals =
seems to have stopped.
 
I sent my =
handle to Brad <<mailto:dl6=
0280@bellsouth.net>dl60280@bellsouth.net> =

and he returned =
it
in two weeks machined and ready for =
reinstall.
 
Jeff =
Liegner
LIVP in New =
Jersey
 
 
 
> 
>To: =
 <mailto:lml=
@lancaironline.net>lml@lancaironline.net
>From: "Nicholas Paczkowski" =
<<mailto:npa=
czkowski@telus.net>npaczkowski@telus.net>
>Subject: Gear Hand Pump =
LIV
> 
>Perhaps a =
dumb question (apologies in advance) but Is there a =
better
>alternative available to the manually operated =
hydraulic 'gear down'
>lever =
(such as a charged gas bottle) that would eliminate both =
the
>awkward =
lever and the seemingly inevitable leaking of =
hydraulic
>fluid? =
Thanks.
 
 
--
For archives =
and unsub <http://mail.lancaironline.net:81/lists/lml/List.html>=
;http://mail.lancaironline.net:81/lists/lml/List.html

<= o:p> 

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