Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Sun, 30 May 2004 14:28:37 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m21.mx.aol.com ([64.12.137.2] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 97109 for lml@lancaironline.net; Sun, 30 May 2004 12:12:00 -0400 Received: from Sky2high@aol.com by imo-m21.mx.aol.com (mail_out_v37_r1.3.) id q.149.2a8c0de6 (14374) for ; Sun, 30 May 2004 12:11:24 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <149.2a8c0de6.2deb61ac@aol.com> X-Original-Date: Sun, 30 May 2004 12:11:24 EDT Subject: Re: [LML] LNC2 rod end X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1085933484" X-Mailer: 9.0 for Windows sub 910 -------------------------------1085933484 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/30/2004 10:33:35 AM Central Standard Time, ian.crowe@sympatico.ca writes: Yes I had the rod end shear off. I am convinced that the geometry of the system is all wrong. By this I mean that when you need the cylinder to completely close the door it is at a point where most of the pull from the cylinder is parallel to the door. Also I feel that the cylinder should be to free to pivot about its mounting point. This is due o the fact that the operating end moves in arc to close the door. If the cylinder cannot pivot the force will impose a bending moment on the rod end and of course the rest of the system. Ian, The plans call for the actuator to vertically pivot at the cockpit floor attach point - indeed, the securing bolt is finished off with a castle nut so that it is loose enough to pivot. I assume that the up-stop tubes were installed? Note that although it appears the pull is parallel to the closed door, the door attachment provides a small arm about the hinge axis. I have noticed many 320/360 inboard gear doors flapping horribly in the prop induced turbulence (especially if the doors are opened much beyond vertical) and I think that if the gear is dropped or flown above 120 Kts, this situation is worsened. I wonder if such movement could work harden the rather small rod end? Scott Krueger AKA Grayhawk Sky2high@aol.com II-P N92EX IO320 Aurora, IL (KARR) LML, where ideas collide and you decide! -------------------------------1085933484 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 5/30/2004 10:33:35 AM Central Standard Time,=20 ian.crowe@sympatico.ca writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
Yes I had the rod end shear off.  I=20= am=20 convinced that the geometry of the system is all wrong.  By this I me= an=20 that when you need the cylinder to completely close the door it is at a po= int=20 where most of the pull from the cylinder is parallel to the door.  Al= so I=20 feel that the cylinder should be to free to pivot about its mounting=20 point.  This is due o the fact that the operating end moves in arc to= =20 close the door.  If the cylinder cannot pivot the force will impose a= =20 bending moment on the rod end and of course the rest of the=20 system.
Ian,
 
The plans call for the actuator to vertically pivot at the cockpit floo= r=20 attach point - indeed, the securing bolt is finished off with a castle nut s= o=20 that it is loose enough to pivot.
 
I assume that the up-stop tubes were installed?  Note that althoug= h it=20 appears the pull is parallel to the closed door, the door attachment provide= s a=20 small arm about the hinge axis.
 
I have noticed many 320/360 inboard gear doors flapping horribly in the= =20 prop induced turbulence (especially if the doors are opened much beyond=20 vertical) and I think that if the gear is dropped or flown above 120 Kts, th= is=20 situation is worsened.  I wonder if such movement could work harden the= =20 rather small rod end?=20
 
Scott Krueger=20 AKA Grayhawk
Sky2high@aol.com
II-P N92EX IO320 Aurora, IL=20 (KARR)

LML, where ideas collide and you=20 decide!
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