Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sat, 08 Jan 2005 11:48:31 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 595645 for lml@lancaironline.net; Sat, 08 Jan 2005 11:41:25 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v37_r3.8.) id q.75.3c2ecc49 (3972) for ; Sat, 8 Jan 2005 11:40:51 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <75.3c2ecc49.2f116712@aol.com> X-Original-Date: Sat, 8 Jan 2005 11:40:50 EST Subject: Re: [LML] LNC2 Gear Free Fall X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1105202450" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1105202450 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 1/8/2005 9:25:24 A.M. Central Standard Time, marv@lancaironline.net writes: New guy here. I am doing the shake down inspection on my new 360 and can not get the main gear to lock when I open the dump valve. The nose works fine and the left worked OK until I put new seals in the cylinder. Everything swings very smoothly if I disconnect the hyd lines. It seems to me that the overcenter springs have no strength. I can easily move them and they seem shorter than the ones that I see in some of your pics.The hydraulic system works fine under power. Everything comes and goes as it should in the barn.Thanks. Jim, Welcome to the hi-speed herd. 1. With the dump valve open, crack the nose gear overcenter link and push on the nose gear - you should have at least a 25 pound push to start that gear aft. If not, get a new gas spring. 2. The over center main gear springs were never meant to apply any more force than that necessary to keep the over center link locked. It should take no more than 2-3 pounds pushing outward on the gravity decended main gear to get it to lock. BTW, any "unlocked" gear should not light the locked light. Make sure nothing is binding and the moving parts are lubricated. Look for binding in the entire main over center link, especially at the end that is attached to the spar - this end is like a rod end and can rotate fore and aft somewhat - it can bind a bit as can the fwd and aft pivots (spherical bearings also). Look to make sure the actuator rods are not bent. Look to make sure the main gear pivot bar (between the fwd and aft spar) is not bent. 3. Make the in flight check. Slow to 87 KIAS, pump and relay breakers pulled, gear sw to down, open the dump valve. Doors should snap open, nose gear should come down and lock smartly, mains should drop more slowly and the plane should be skidded (slipped) to easily lock any main not already locked. If there are any problems (nose not locking, sticky main, etc.), fix them. Scott Krueger AKA Grayhawk Lancair N92EX IO320 Aurora, IL (KARR) -------------------------------1105202450 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 1/8/2005 9:25:24 A.M. Central Standard Time,=20 marv@lancaironline.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>New guy=20 here. I am doing the shake down inspection on
my new 360 and can= not=20 get the main gear to lock when
I open the dump valve. The nose w= orks=20 fine and the
left worked OK until I put new seals in the=20 cylinder.
Everything swings very smoothly if I disconnect=20 the
hyd lines. It seems to me that the overcenter springs
&nb= sp;=20 have no strength. I can easily move them and they seem
shorter t= han=20 the ones that I see in some of your
pics.The hydraulic system wo= rks=20 fine under power.
Everything comes and goes as it should in=20 the
barn.Thanks.

Jim,

Welcome to the hi-speed herd.

1. With the dump valve open, crack the nose gear overcenter link=20= and=20 push on the nose gear - you should have at least a 25 pound push to start th= at=20 gear aft. If not, get a new gas spring.

2. The over center main gear springs were never meant to apply an= y=20 more force than that necessary to keep the over center link locked.&nbs= p;=20 It should take no more than 2-3 pounds pushing outward on the gravity decend= ed=20 main gear to get it to lock. BTW, any "unlocked" gear should not light= the=20 locked light. Make sure nothing is binding and the moving parts are=20 lubricated. Look for binding in the entire main over center link,= =20 especially at the end that is attached to the spar - this end is like a= rod=20 end and can rotate fore and aft somewhat - it can bind a bit as can the fwd=20= and=20 aft pivots (spherical bearings also). Look to make sure the actuator r= ods=20 are not bent. Look to make sure the main gear pivot bar (between the f= wd=20 and aft spar) is not bent.

3. Make the in flight check. Slow to 87 KIAS, pump and rela= y=20 breakers pulled, gear sw to down, open the dump valve. Doors should sn= ap=20 open, nose gear should come down and lock smartly, mains should drop more sl= owly=20 and the plane should be skidded (slipped) to easily lock any main not alread= y=20 locked. If there are any problems (nose not locking, sticky main, etc.= ),=20 fix them. =20

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 Aurora, IL=20 (KARR)

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