X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 11 Feb 2012 20:50:50 -0500 Message-ID: X-Original-Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.125] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5391698 for lml@lancaironline.net; Fri, 10 Feb 2012 23:07:48 -0500 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.125; envelope-from=sdfields@austin.rr.com X-Original-Return-Path: X-Authority-Analysis: v=2.0 cv=T9kOvo2Q c=1 sm=0 a=PqPO4JKa4sWl5r6olSFFsw==:17 a=AWEK6bHaBIoA:10 a=5Up8faWwAAAA:8 a=Ia-xEzejAAAA:8 a=95DfZoFxhRnCPv_Qx1YA:9 a=9YmuT1JjRBv8Ln8Ua1sA:7 a=CjuIK1q_8ugA:10 a=v6MMM96S_sUA:10 a=EzXvWhQp4_cA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=SglqUDKa_4Vs1KTVlBAA:9 a=XgpF5Z7YBoZ1lMWltHUA:7 a=gKO2Hq4RSVkA:10 a=hTZeC7Yk6K0A:10 a=PqPO4JKa4sWl5r6olSFFsw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 66.68.62.28 Received: from [66.68.62.28] ([66.68.62.28:1691] helo=stanstudy) by hrndva-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 14/5A-26414-279E53F4; Sat, 11 Feb 2012 04:07:14 +0000 From: "Stan Fields" X-Original-To: "'Jim Nordin'" X-Original-Cc: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: Legacy Flap Symmetry Question X-Original-Date: Fri, 10 Feb 2012 22:07:10 -0600 X-Original-Message-ID: <002d01cce872$a0fc5930$e2f50b90$@rr.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01CCE840.5661E930" X-Mailer: Microsoft Office Outlook 12.0 Content-Language: en-us Thread-Index: AczoCIvQMGyUQBkzSCO3eKIU0M1yYQAAPMHQABgMopA= This is a multi-part message in MIME format. ------=_NextPart_000_002E_01CCE840.5661E930 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Jim, The last time I did a waterline check was when I closed the wings. At that time the ailerons were attached into the pre-drilled locations and aligned to the fixed wing tips. I have assumed that this setup was golden. On the Legacy the Flap Bellcranks come welded to the center torque tube. The Torque Tube Supports attach in predrilled holes on the Aft Spar. This is all fixed. Similarly the Flap Hinges are simple bolt-ons into predrilled, pre-aligned locations in the wing and flaps. So as far as I can tell all of this should move in precise unison. Installation alignment seems pretty straight forward also. Just adjust the Flap Control Rod to align the Flap to the Aileron on the outboard side. Then if necessary bodywork the Fuselage Fillet on the inboard side to align with the Flap. Adjust the stops on the Flap Actuator for a 0 - 40 degree range. That's it. Right now the flaps line up nicely with the Ailerons. Any changes on the Control Rod Bearings will deviate from the ideal. The only thing I can think of that would make one side deploy faster than the other is that the Control Rod attachment on the torque tube arm is slightly farther out than the other. Unfortunately there is no easy adjustment for this. Perhaps a shim under the Right Torque Tube Support Bracket would push out the Bellcrank enough to compensate? As Scott points out, further adjustment may be necessary during the test flying phase, so is a delta of 1.8 degrees at full extension close enough. The thought of test flying someday sounds exciting, but I don't want to test a cork screw. Stan From: Jim Nordin [mailto:panelmaker@earthlink.net] Sent: Friday, February 10, 2012 9:54 AM To: 'Stan Fields' Subject: Legacy Flap Symmetry Question Hey Stan, The bellcranks (for the ailerons and flaps) are same left to right if I'm not mistaken - trying to eliminate errors in construction of metal parts. These translators also must be mounted at the same angle of rotation. Check that when both flaps are retracted, both are at the same angle of attack and are aligned with the fuselage fillets. The left aileron (when set to be faired into the wing tip) must be at the same waterline as the right (both distal and proximal.) If not, the difference is because the ailerons are not starting at the same relative position. Check 'um all out. I'm not building a Legacy but the starting points for determining errors, differences and the like, are the same. Hope this helps. Jim _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Stan Fields Sent: Friday, February 10, 2012 9:26 AM To: lml@lancaironline.net Subject: [LML] Legacy Flap Symmetry Question I'm building in my garage so I usually work one side of the plane then the other. So far that has worked well. However, I installed my left Flap and adjusted the control rod to produce a 0-40 degree movement. I hooked it to the Flap actuator to produce these limits and everything was perfect. Now I have attached the right Flap and adjusted the control rod to align with the aileron Unfortunately the Flap actuator produces a 41.8 degree movement. I can't see how to change this without customizing the Flap installation in some way. So, how much difference will 1.8 degree difference make in flight characteristics at full deployment. Has anyone experienced this and what did you do? Stan Fields L2K #201 ------=_NextPart_000_002E_01CCE840.5661E930 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Jim,

 

The last time I did a waterline check was when I closed= the wings. At that time the ailerons were attached into the pre-drilled lo= cations and aligned to the fixed wing tips. I have assumed that this setup = was golden.

 

On the Legacy the Flap Bellcranks come welded to the  c= enter torque tube. The Torque Tube Supports attach in predrilled holes on t= he Aft Spar. This is all fixed. Similarly the Flap Hinges are simple bolt-o= ns into predrilled, pre-aligned locations in the wing and flaps. So as far = as I can tell all of this should move in precise unison. Installation align= ment seems pretty straight forward also. Just adjust the Flap Control Rod t= o align the Flap to the Aileron on the outboard side.  Then if necessa= ry bodywork the Fuselage Fillet on the inboard side to align with the Flap.=   Adjust the stops on the Flap Actuator for a 0 - 40 degree range. Tha= t’s it. 

 

Right now the flaps line up nicely with the Ailerons= Any changes on the Control Rod Bearings will deviate from the ideal. = ; The only thing I can think of that would make one side deploy faster than= the other is that the Control Rod attachment on the torque tube arm is sli= ghtly farther out than the other. Unfortunately there is no easy adjustment= for this. Perhaps a shim under the Right Torque Tube Support Bracket would= push out the Bellcrank enough to compensate?

 

As Scott points out, further= adjustment may be necessary during the test flying phase, so is a delta of= 1.8 degrees at full extension close enough.  The thought of test flyi= ng someday sounds exciting,  but I don’t want to test a cork scr= ew.

 

Stan

 

 

<= b>From:<= /span> Jim Nordin [mailto:panelmaker@earthlink.net]
Sent: Friday, Fe= bruary 10, 2012 9:54 AM
To: 'Stan Fields'
Subject: Lega= cy Flap Symmetry Question

 

Hey Stan,

The = bellcranks (for the ailerons and flaps) are same left to right if I’m= not mistaken – trying to eliminate errors in construction of metal p= arts. These translators also must be mounted at the same angle of rotation.= Check that when both flaps are retracted, both are at the same angle of at= tack and are aligned with the fuselage fillets.

The left aileron (when set to be faired into the wing tip) must be at the = same waterline as the right (both distal and proximal.) If not, the differe= nce is because the ailerons are not starting at the same relative position.=

Check ‘um all out.

I’m not building a Legacy but the starting points for determi= ning errors, differences and the like, are the same.

<= p class=3DMsoNormal>Hope this helps.

Jim

 

From: Lancair Mailing List [mailto:lml@lancairo= nline.net] On Behalf Of Stan Fields
Sent: Friday, February= 10, 2012 9:26 AM
To: lml@lancaironline.net
Subject: [L= ML] Legacy Flap Symmetry Question

 

I’m building in my garage so I usu= ally work one side of the plane then the other. So far that has worked well= However, I installed my left Flap and adjusted the control rod to produce= a 0-40 degree movement. I hooked it to the Flap actuator to produce these = limits and everything was perfect.

 

Now I have attached the right Flap and adjusted the = control rod to align with the aileron Unfortunately the Flap actuator produ= ces a 41.8 degree movement. I can’t see how to change this without cu= stomizing the Flap installation in some way.

&= nbsp;

So, how much difference will 1.8 degree d= ifference make in flight characteristics at full deployment. Has anyone exp= erienced this and what did you do?

 

Stan Fields

L2K #201

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