X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 09 Jun 2012 14:24:11 -0400 Message-ID: X-Original-Return-Path: Received: from imr-ma06.mx.aol.com ([64.12.78.142] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5589821 for lml@lancaironline.net; Sat, 09 Jun 2012 11:31:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.78.142; envelope-from=Sky2high@aol.com Received: from mtaomg-db01.r1000.mx.aol.com (mtaomg-db01.r1000.mx.aol.com [172.29.51.199]) by imr-ma06.mx.aol.com (8.14.1/8.14.1) with ESMTP id q59FVEha018542 for ; Sat, 9 Jun 2012 11:31:14 -0400 Received: from core-mtc002b.r1000.mail.aol.com (core-mtc002.r1000.mail.aol.com [172.29.235.5]) by mtaomg-db01.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 3C063E000081 for ; Sat, 9 Jun 2012 11:31:14 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <4afa5.7321f9bb.3d04c642@aol.com> X-Original-Date: Sat, 9 Jun 2012 11:31:14 -0400 (EDT) Subject: Re: [LML] Re: 360 Main Gear X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_4afa5.7321f9bb.3d04c642_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:461883264:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d33c74fd36c4270cd --part1_4afa5.7321f9bb.3d04c642_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Angier, 1. The LEG should be rigid as it can be with its 4 (or 5 if you like) movement points (2 solidly bolted rod ends on the over center over-center link, the 2 leg pivot bearings in the fwd and aft spars plus the link pivot bolt itself). 2. The wheel should be tight enough on the axle so that a push/flick attempt to rotate it should have it stop before one rotation (i.e. the bearings must be tight against the wheel hub), thus no side movement. 3. Then there is the leg pivot bolt that the casting rotates on and that should be tight enough to allow fwd/aft rotation, but very little sideways displacement. 4. That leaves the suspension (TK5's ?) that contributes nothing particularly structural to side loads. So, where is it too loose or is it loose? When the plane sits on its wheels, the stub wing is bearing the fuselage weight and flexes a bit so the wheel is under a load that pushes it outboard. You would notice this when the plane is first jacked off the floor and the wheels pull inboard a bit. Scott Krueger In a message dated 6/9/2012 10:03:28 A.M. Central Daylight Time, N4ZQ@VERIZON.NET writes: With N4ZQ on jacks, I have some side play in each main gear and I understand that this is typical. I haven't had an opportunity to measure it yet but plan to do so. Have any of you measured this movement. What would be considered excessive? Thanks, Angier Ames N4ZQ -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html --part1_4afa5.7321f9bb.3d04c642_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Angier,
 
1. The LEG should be rigid as it can be with its 4 (or&nbs= p;5=20 if you like) movement points (2 solidly bolted rod ends on the over ce= nter=20 over-center link, the 2 leg pivot bearings in the fwd and aft=20 spars plus the link pivot bolt itself). 
2. The wheel should be tight enough on the axle so that a push/flick= =20 attempt to rotate it should have it stop before one rotation (i.e. the bear= ings=20 must be tight against the wheel hub), thus no side movement. 
3. Then there is the leg pivot bolt that the casting rotates on a= nd=20 that should be tight enough to allow fwd/aft rotation, but very little side= ways=20 displacement. 
4. That leaves the suspension (TK5's ?) that contributes nothing=20 particularly structural to side loads.
 
So, where is it too loose or is it loose?
 
When the plane sits on its wheels, the stub wing is bearing the= =20 fuselage weight and flexes a bit so the wheel is under a load tha= t=20 pushes it outboard.  You would notice this when the plane is first jac= ked=20 off the floor and the wheels pull inboard a bit.
 
Scott Krueger
 
In a message dated 6/9/2012 10:03:28 A.M. Central Daylight Time,=20 N4ZQ@VERIZON.NET writes:
= With=20 N4ZQ on jacks, I have some side play in each main gear and I understand t= hat=20 this is typical. I haven't had an opportunity to measure it yet but plan = to do=20 so. Have any of you measured this movement. What would be considered=20 excessive?

Thanks,

Angier Ames
N4ZQ
--
For archiv= es=20 and unsub=20 http://mail.lancaironline.net:81/lists/lml/List.html --part1_4afa5.7321f9bb.3d04c642_boundary--