Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Thu, 31 Mar 2005 11:21:42 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m23.mx.aol.com ([64.12.137.4] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 831422 for lml@lancaironline.net; Thu, 31 Mar 2005 09:17:38 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.4; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m23.mx.aol.com (mail_out_v37_r5.33.) id q.e3.10682403 (16781) for ; Thu, 31 Mar 2005 09:16:45 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Thu, 31 Mar 2005 09:16:45 EST Subject: Re: [LML] Re: nose gear door X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1112278605" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1112278605 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 3/30/2005 8:46:49 P.M. Central Standard Time, Sky2high@aol.com writes: In a message dated 3/30/2005 8:37:50 A.M. Central Standard Time, goconnell@dodo.com.au writes: Replacing the valve seemed to temporarily correct the problem but this was short lived. It has also been suggested by an Australian builder that perhaps the nose wheel precesses slightly with gyroscopic force during retraction and thus is at a slight angle different to when on the ground and thus does not depress the valve. I don't have the self centering nose wheel mod. The suggestion was to check the bearings for wear + play in the nose wheel. On landing, I have noticed some "judder" or shimmy during my roll out. This would be consistent with worn bearings would Gerard, I don't know about non-centering nose gear anymore as I switched to it as soon as possible. Since they are of Aussie origination, maybe a drop ship to you would be a lot easier than somewhere in the Americas. Any shimmy is of concern since, if it occurs at touchdown of 170 Kts, flutter destruction of everything that the nose gear is attached to is inevitable (and quick). The nose wheel thru bolt should be tightened so that you cannot "spin" the nose tire by hand (off the ground of course) any more than 1/4 turn just in case the "judder" is caused by "loose" bearings.. Now remember that - the bail around the back of the wheel is to "guide" the wheel into the well should it not be straight. Regardless of the angle of the wheel slamming into the well, the "finger" on the retraction mechanism should always trip the sequence valve when the wheel is stowed and out of the way. Then the door should close. Period. Mr Shattuck's explanatiion of the delamination possibility should be investigated. Gerard, Yikes! I should reread my emails before hitting send. I should have made it clear that I have been operating for a long time with the self-centering nose gear. More importantly, a 170 Kt touchdown speed can only be done in Flight Simulator - this mistake was an example of too many keys on the keyboard. Try around 60-70 Kts for touchdown speed. Scott Krueger -------------------------------1112278605 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 3/30/2005 8:46:49 P.M. Central Standard Time,=20 Sky2high@aol.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

In a message dated 3/30/2005 8:37:50 A.M. Central Standard Time,=20 goconnell@dodo.com.au writes:

Replacing the valve seemed to temporarily correct the problem b= ut=20 this was short lived. It has also been suggested by an Australian builde= r=20 that perhaps the nose wheel precesses slightly with gyroscopic force dur= ing=20 retraction and thus is at a slight angle different to when on the ground= and=20 thus does not depress the valve. I don't have the self centering nose wh= eel=20 mod. The suggestion was to check the bearings for wear + play in the nos= e=20 wheel. On landing, I have noticed some "judder" or shimmy during my= =20 roll out. This would be consistent with worn bearings would=20

Gerard,

I don't know about non-centering nose gear anymore as I switched to=20 it as soon as possible. Since they are of Aussie origination, m= aybe=20 a drop ship to you would be a lot easier than somewhere in the Americ= as.=20

Any shimmy is of concern since, if it occurs at touchdown of 170 Kts,= =20 flutter destruction of everything that the nose gear is attached to i= s=20 inevitable (and quick). The nose wheel thru bolt should be tightened= so=20 that you cannot "spin" the nose tire by hand (off the ground of cours= e)=20 any more than 1/4 turn just in case the "judder" is caused by "loose"= =20 bearings..

Now remember that - the bail around the back of the wheel is to=20 "guide" the wheel into the well should it not be straight. Regardless of t= he=20 angle of the wheel slamming into the well, the "finger" on the retraction=20 mechanism should always trip the sequence valve when the wheel is stowed a= nd=20 out of the way. Then the door should close. Period. Mr Shattuck's=20 explanatiion of the delamination possibility should be investigated.=20

Gerard,

Yikes! I should reread my emails before hitting send. I sho= uld=20 have made it clear that I have been operating for a long time with the=20 self-centering nose gear.

More importantly, a 170 Kt touchdown speed can only be done in Flight=20 Simulator - this mistake was an example of too many keys on the keyboard.&nb= sp;=20 Try around 60-70 Kts for touchdown speed.

Scott Krueger

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