X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 29 Oct 2013 07:40:35 -0400 Message-ID: X-Original-Return-Path: Received: from carbinge.com ([69.5.27.218] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with SMTP id 6568110 for lml@lancaironline.net; Tue, 29 Oct 2013 00:22:05 -0400 Received-SPF: none receiver=logan.com; client-ip=69.5.27.218; envelope-from=jbarrett@carbinge.com Received: (qmail 13468 invoked from network); 29 Oct 2013 04:21:30 -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=A1imegQKPpkOsNjup8BIu7/+etFaphw7NQQOmaDymSpT4pYjQRjvHq04Bqwwswubmy3QSeCUTdg0bo5c2JhkzrxXXRhyPalA+WeOn8hQbMP2Cl0rqsNj0FzuGJFGNCDIXho6mnZVBGR8V3gbpJkZfQBEqMUlg4DcBlj58NwEDrU=; X-Originating-IP: [208.53.115.208] Reply-To: From: "John Barrett" X-Original-To: , "Lancair Mailing List" References: <8D0A2152C60DF8B-91C-18409@webmailstg-m02.sysops.aol.com> In-Reply-To: <8D0A2152C60DF8B-91C-18409@webmailstg-m02.sysops.aol.com> Subject: RE: [LML] Re: IVP Jacks X-Original-Date: Mon, 28 Oct 2013 21:21:29 -0700 X-Original-Message-ID: <05a101ced45e$57d22fd0$07768f70$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_05A2_01CED423.AB7357D0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac7T/guYilhpjv5UQR+uj98UZ2NR/AABk0UA Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_05A2_01CED423.AB7357D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Glad you noticed that, Jeff, and I should have mentioned that the bottom is tied to an anchor in the concrete in this photo. It looks like it might just be hanging there and is not. I have since made a concrete hold down for the tail with wheels on the bottom. As the plane goes up on the jacks, the tail moves in an arc fwd and aft so it is good to be able to move the hold down to stay underneath the tail. There is a tool box on the nose in the photo and some lead shot bags as well because my airplane is CG aft and there is not enough weight forward to keep the tail from wanting to drop without additional weight on the nose. John From: vtailjeff@aol.com [mailto:vtailjeff@aol.com] Sent: Monday, October 28, 2013 9:52 AM To: jbarrett@carbinge.com Subject: Re: [LML] Re: IVP Jacks Johnm Your "tail support" looks rather unsteady. I have seen the tail both go up and down and move a bit during gear swings and people getting in an out... just saying. I made a tail stand out of a large metal tub, concrete and a harbor freight hydraulic cylinder. Too many airplanes have fallen off of jacks, including one IVP. Belt and suspenders. Bes regards! Jeff -----Original Message----- From: John Barrett To: lml Sent: Mon, Oct 28, 2013 11:37 am Subject: [LML] Re: IVP Jacks Hi Greg, I made my jacks from Harbor Freight hydraulic cylinders with flat bottoms and welded up stands around them. A lot of work and the cylinder hydraulics don't hold up all that well. Also they are not as stable as the expensive commercial ones. We were jacking up the plane outside for gear checks in Redmond a couple years ago and light winds were really scary. I only use inside the hangar since then and have modified them to make them a little more stable. They are workable and now I'm pretty comfortable with them, but investing in some good ones is not a bad alternative. The aircraft has to go up so high and the jack points are close enough together that light lateral forces will cause things to sway and wobble - makes me pucker sometimes. The episode in the photo was on concrete apron that was not at all flat - that added to the instability and was not a good plan. John Barrett N31VP The message is ready to be sent with the following file or link attachments: all ipad photos 565 Note: To protect against computer viruses, e-mail programs may prevent sending or receiving certain types of file attachments. Check your e-mail security settings to determine how attachments are handled. -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html ------=_NextPart_000_05A2_01CED423.AB7357D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Glad you noticed that, Jeff,  and I should have mentioned that = the bottom is tied to an anchor in the concrete in this photo.  =  It looks like it might just be hanging there and is not.  =

 

I have since made a concrete hold down for the tail with wheels on = the bottom.  As the plane goes up on the jacks, the tail moves in = an arc fwd and aft so it is good to be able to move the hold down to = stay underneath the tail.

 

There is a tool box on the nose in the photo and some lead shot bags = as well because my airplane  is CG aft and there is not enough = weight forward to keep the tail from wanting to drop without additional = weight on the nose.

 

John

 

From:= = vtailjeff@aol.com [mailto:vtailjeff@aol.com]
Sent: Monday, = October 28, 2013 9:52 AM
To: = jbarrett@carbinge.com
Subject: Re: [LML] Re: IVP = Jacks

 

J= ohnm

&= nbsp;

Y= our "tail support" looks rather unsteady. I have seen the tail = both go up and down and move a bit during gear swings and people getting = in an out... just saying. I made a tail stand out of a large metal tub, = concrete and a harbor freight hydraulic cylinder. Too many airplanes = have fallen off of jacks, including one IVP. Belt and = suspenders.

&= nbsp;

B= es regards!

&= nbsp;

J= eff

-= ----Original Message-----
From: John Barrett <jbarrett@carbinge.com>
To= : lml <lml@lancaironline.net>
Se= nt: Mon, Oct 28, 2013 11:37 am
Subject: [LML] Re: IVP = Jacks

 Hi =
Greg,
 
I made my =
jacks from Harbor Freight hydraulic cylinders with flat =
bottoms
and welded up =
stands around them.  A lot of work and the cylinder =
hydraulics
don't hold up =
all that well.   Also they are not as stable as the =
expensive
commercial =
ones.  We were jacking up the plane outside for gear checks =
in
Redmond a couple years ago and light winds were =
really scary.  I only use
inside the =
hangar since then and have modified them to make them a =
little
more =
stable.  They are workable and now I'm pretty comfortable with =
them,
but investing =
in some good ones is not a bad alternative.  The aircraft  =
has
to go up so =
high and the jack points are close enough together that =
light
lateral =
forces will cause things to sway and wobble - makes me =
pucker
sometimes.  
 
The episode =
in the photo was on concrete apron that was not at all flat =
-
that added to the instability and was not a good =
plan.  
 
John =
Barrett
N31VP
 
 =

The message is ready to be sent with the following =
file or link attachments:
 
all ipad =
photos 565
 
 
Note: To =
protect against computer viruses, e-mail programs may =
prevent
sending or =
receiving certain types of file attachments.  Check your =
e-mail
security =
settings to determine how attachments are =
handled.

<= o:p> 

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