X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 06 Jul 2011 14:05:21 -0400 Message-ID: X-Original-Return-Path: Received: from mail-fx0-f42.google.com ([209.85.161.42] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5043496 for lml@lancaironline.net; Wed, 06 Jul 2011 06:20:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.42; envelope-from=indigoaviation@gmail.com Received: by fxe23 with SMTP id 23so5880809fxe.1 for ; Wed, 06 Jul 2011 03:20:06 -0700 (PDT) MIME-Version: 1.0 Received: by 10.223.55.8 with SMTP id s8mr12833431fag.141.1309947606620; Wed, 06 Jul 2011 03:20:06 -0700 (PDT) Received: by 10.223.1.68 with HTTP; Wed, 6 Jul 2011 03:20:06 -0700 (PDT) In-Reply-To: References: X-Original-Date: Wed, 6 Jul 2011 06:20:06 -0400 X-Original-Message-ID: Subject: Re: [LML] Leveling Points-Lancair IV/IV-P From: swaid rahn X-Original-To: Lancair Mailing List Content-Type: multipart/alternative; boundary=0015173fe600c4587704a763f1a1 --0015173fe600c4587704a763f1a1 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hello All, Another method for a quick level is to designate a screw in the center overhead and hang a plumb bob just above the spar cap. You would want to initially level the aircraft in pitch and roll then install the plumb bob and mark with a permanent marker on the spar cap. Then to level the acft. a= t a later date just remove the piece of carpet and hang the plumb bob, it's a lot easier than fooling with a bunch of lasers and levels. Use a fine line because it's very accurate and also have the string clocked in the same position each time. It might be better to use a tab washer for the upper end with the exact string length. Then it's just a matter of removing and reinstalling one screw to set up for leveling. Another benefit is you don't have to worry about batteries or level calibration, at least as long as our Earth's gravity stays in calibration. Swaid Rahn LNC-4PT Walter LNC-4PT Garrett (in process) On Tue, Jul 5, 2011 at 12:55 PM, Robert R Pastusek wrot= e: > Last month I offered to provide =93alternate=94 leveling points for th= e > Lancair IV/IV-P. I have now lost track of who I promised this to, but wa= s > able to take the necessary measurements during my just-completed conditio= n > inspection:**** > > ** ** > > The leveling dimples on the fuselage firewall joggle (one on each side) a= re > located approximately 3.5=94 down from the centerline of the top (left an= d > right) engine mounting bolts. The aft leveling point can be re-establishe= d > at a point 2.4=94 down the back edge of the rear fuselage inspection pane= l > from the top joggle. I used the joggle as molded into the fuselage for th= is > reference by extending the line of the joggle aft, then measuring down 2.= 4=94 > along the rear side of the opening. Consider drilling a small hole in the > flange holding the inspection plate for future reference. **** > > ** ** > > These should not be considered as accurate/precise as the original dimple= s > molded into the fuselage, but for those who have finished over the origin= al > leveling points, these measurements should be within 0.2=94 of the origin= als, > and will generate a level reference within 0.1 degree over the distance > between the front and rear leveling points. I would not use these > measurements for determining side to side (roll) level. The installed > wings and/or horizontal stabilizer would likely yield a more accurate rol= l > level. **** > > ** ** > > You might consider measuring the rear seat bottom=97as an easy to use lev= el > pitch and roll reference. My seat bottom is level within 0.1 degrees in > roll, and 0.2 degrees in pitch. I recorded this during building, just in > case, and can easily level the airplane using a digital level on the seat > bottom=85one of the few large flat places on my airplane. > ** > ****** > > Hope this helps!**** > > ** ** > > Bob**** > > ** ** > --=20 Swaid L. Rahn Indigo Aviation, Inc. 940 Mock Road Springfield, Ga. 31329 Cell 912.655.0966 --0015173fe600c4587704a763f1a1 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hello All,
=A0Another method for a quick level is to designate a screw in the cen= ter overhead and hang a plumb bob just above the spar cap. You would want t= o initially level the aircraft in pitch and roll then install the plumb bob= and mark with a permanent marker on the spar cap. Then to level the acft. = at a later date just remove the piece of carpet and hang the plumb bob, it&= #39;s a lot easier than fooling with a bunch of lasers and levels. Use a fi= ne line because it's very accurate and also have the string clocked in = the same position each time. It might be better to use a tab washer for the= upper end=A0with the exact string length. Then it's just a matter of r= emoving and reinstalling one screw to set up for leveling.=A0Another benefi= t is=A0you don't have to worry about batteries or=A0level calibration, = at least as long as our Earth's gravity stays in calibration.
=A0
Swaid Rahn
LNC-4PT Walter
LNC-4PT Garrett (in process)

On Tue, Jul 5, 2011 at 12:55 PM, Robert R Pastus= ek <rpastusek@ht= ii.com> wrote:

Last= month I offered to provide =93alternate=94 leveling points for the Lancair= IV/IV-P.=A0 I have now lost track of who I promised this to, = but was able to take the necessary measurements during my just-completed co= ndition inspection:

<= /u>=A0

The = leveling dimples on the fuselage firewall joggle (one on each side) are loc= ated approximately 3.5=94 down from the centerline of the top (left and rig= ht) engine mounting bolts. The aft leveling point can be re-established at = a point 2.4=94 down the back edge of the rear fuselage inspection panel fro= m the top joggle. I used the joggle as molded into the fuselage for this re= ference by extending the line of the joggle aft, then measuring down 2.4=94= along the rear side of the opening. Consider drilling a small hole in the = flange holding the inspection plate for future reference.

<= /u>=A0

Thes= e should not be considered as accurate/precise as the original dimples mold= ed into the fuselage, but for those who have finished over the original lev= eling points, these measurements should be within 0.2=94 of the originals, = and will generate a level reference within 0.1 degree over the distance bet= ween the front and rear leveling points. I would not use these measurements= =A0 for determining side to side (roll) level. The installed w= ings and/or horizontal stabilizer would likely yield a more accurate roll l= evel.

<= /u>=A0

You = might consider measuring the rear seat bottom=97as an easy to use level pit= ch and roll reference. My seat bottom is level within 0.1 degrees in roll, = and 0.2 degrees in pitch. I recorded this during building, just in case, an= d can easily level the airplane using a digital level on the seat bottom=85= one of the few large flat places on my airplane.

Hope= this helps!

<= /u>=A0

Bob<= u>

=A0

=



--
Swaid L. Rahn
Indigo= Aviation, Inc.
940 Mock Road
Springfield, Ga. 31329
Cell 912.655.= 0966


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