X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 13 Jul 2005 13:14:01 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m25.mx.aol.com ([64.12.137.6] verified) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 1054906 for lml@lancaironline.net; Wed, 13 Jul 2005 10:39:31 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.6; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m25.mx.aol.com (mail_out_v38_r1.7.) id q.bd.5b958e47 (16633) for ; Wed, 13 Jul 2005 10:38:44 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Wed, 13 Jul 2005 10:38:44 EDT Subject: Re: [LML] FAO Scott Kruger-nose gear door scraping X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1121265524" X-Mailer: 9.0 Security Edition for Windows sub 5009 -------------------------------1121265524 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 7/13/2005 8:29:48 A.M. Central Standard Time, goconnell@dodo.com.au writes: back in 2004 you made a posting about your nose wheel striking the door on opening. Did you ever find a solution for this one apart from painting over the tyre mark? Gerard, Hmmmm..... Maybe by using a weak gas spring, encouraging a binding nose gear, dropping the gear at excessive speeds (GT 120 KIAS) or perhaps, not connecting the "down" side of the nose gear door actuator to the hydraulic system at all (an alternative construction method suggested in the early build manual). The fact is that the high powered drop down of the nose gear may demand hydraulic fluid at a rate so great that the system cannot supply enough, even with the pump running - thus the down side of the door actuator is deprived of fluid which may cause incomplete opening of the door. Or, the fluid leaving the nose gear actuator causes a back pressure sufficient to momentarily overcome or slow the door actuator spring. Or, both. Ergo, the gear itself bangs the door out of the way.... Maybe I should just put a roller bearing on the gear fork and beef up the door where it is scratched - I have painted the inside of the door black and currently use a permanent black marking pen to cover the scratch from time to time. The problem is not so serious as to give me heart burn. Maybe I'll just live with it. After all, the gear has always come down (if the down switch is actually selected by the aircraft operator). Once, during emergency drop testing, a main didn't come down because of bent main actuator push rods, but that's another story. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) -------------------------------1121265524 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 7/13/2005 8:29:48 A.M. Central Standard Time,=20 goconnell@dodo.com.au writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>back in=20 2004 you made a posting about your nose wheel striking the door on opening= .=20 Did you ever find a solution for this one apart from painting over the tyr= e=20 mark?
Gerard,
 
Hmmmm..... Maybe by using a weak gas spring, encouraging=20 a binding nose gear, dropping the gear at excessive speeds (GT 120 KIAS= ) or=20 perhaps, not connecting the "down" side of the nose gear door actuator to th= e=20 hydraulic system at all (an alternative construction=20 method suggested in the early build manual).
 
The fact is that the high powered drop down of the nose gear may=20 demand hydraulic fluid at a rate so great that the system=20 cannot supply enough, even with the pump running - thus the down s= ide=20 of the door actuator is deprived of fluid which may cause incomplete opening= of=20 the door.  Or, the fluid leaving the nose gear actuator causes a b= ack=20 pressure sufficient to momentarily overcome or slow the door=20 actuator spring.  Or, both.  Ergo, the gear itself bangs= the=20 door out of the way....
 
Maybe I should just put a roller bearing on the gear fork and beef= up=20 the door where it is scratched - I have painted the inside of the door black= and=20 currently use a permanent black marking pen to cover the scratch from t= ime=20 to time.  The problem is not so serious as to give me heart burn.
 
Maybe I'll just live with it.  After all, the gear has always come= =20 down (if the down switch is actually selected by the aircraft=20 operator).  Once, during emergency drop testing, a=20 main didn't come down because of bent main actuator push rods, but that= 's=20 another story.=20
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)



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