X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 16 Apr 2009 22:17:12 -0400 Message-ID: X-Original-Return-Path: Received: from QMTA09.emeryville.ca.mail.comcast.net ([76.96.30.96] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3582960 for lml@lancaironline.net; Thu, 16 Apr 2009 01:20:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.96; envelope-from=rbelshe@comcast.net Received: from OMTA07.emeryville.ca.mail.comcast.net ([76.96.30.59]) by QMTA09.emeryville.ca.mail.comcast.net with comcast id g5Eh1b0031GXsucA95Kt1e; Thu, 16 Apr 2009 05:19:54 +0000 Received: from desk ([24.4.110.108]) by OMTA07.emeryville.ca.mail.comcast.net with comcast id g5Kt1b0022LMzFc8T5KtVb; Thu, 16 Apr 2009 05:19:53 +0000 From: "Bob B." X-Original-To: "'Lancair Mailing List'" References: Subject: RE: [LML] Gear Free Fall X-Original-Date: Wed, 15 Apr 2009 22:19:51 -0700 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0048_01C9BE18.4C286CA0" X-Mailer: Microsoft Office Outlook 11 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thread-Index: Acm9wIkzhydE1lazQFCaLC1qkqpkmQAkSEAQ This is a multi-part message in MIME format. ------=_NextPart_000_0048_01C9BE18.4C286CA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Simple nose gear gas strut test: At a safe altitude, slow the plane to your gear extension speed, mine is 122 kt. With the gear pump breaker pulled, open the dump valve. Very gradually slow the plane and note the IAS where the nose gear light comes on. Save this number. As the nose strut loses pressure over time, the "down speed" will gradually get lower. On my plane, it was around 80 kt with the old strut and 105 kt with a new strut. Bob Belshe Moraga, CA Lancair 235/320 http://home.comcast.net/~rbelshe/ _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dominic V. Crain Sent: Wednesday, April 15, 2009 4:51 AM To: lml@lancaironline.net Subject: [LML] Gear Free Fall I'd like to draw on the opinion of listers regarding LNC2 gear free fall problem. The main gear is slow to free fall, and on the jacks (most likely in the air) the RMG won't lock in. Slight pressure on the wheel locks it in, which is handy if one wing walks upside down. Disconnected the actuator strut and it drops like a beauty and snaps into position. I doubt the actuator struts are the problem because both main gear have exhibited the same problem at the same time. The LMG does eventually lock down on the jacks. One thing I've noticed is the NG is slower to lock down under normal extension than it usually does. Until recently, it was always the first, and quick to lock down. Under free fall the gas strut dives the NG down and locks as it should quite quickly. Wondered if anyone might have a trouble shooting sequence I can draw upon. Thanks Dom Crain VH-CZJ ------=_NextPart_000_0048_01C9BE18.4C286CA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Simple nose gear gas strut=20 test:
At a safe altitude, slow the = plane to your=20 gear extension speed, mine is 122 kt.
With the gear pump breaker = pulled, open the=20 dump valve.
Very gradually slow the plane and = note the=20 IAS where the nose gear light comes on.  Save this=20 number.
As the nose strut loses pressure = over time,=20 the "down speed" will gradually get lower.  On my plane, it was=20
around 80 kt with the old strut = and 105 kt=20 with a new strut.
 

Bob Belshe
Moraga, = CA
Lancair=20 235/320  
http://home.comcast.net/~rbelshe/ =


From: Lancair Mailing List=20 [mailto:lml@lancaironline.net] On Behalf Of Dominic V.=20 Crain
Sent: Wednesday, April 15, 2009 4:51 AM
To:=20 lml@lancaironline.net
Subject: [LML] Gear Free=20 Fall

I’d like to = draw on the=20 opinion of listers regarding LNC2 gear free fall=20 problem.

The main gear is = slow to free=20 fall, and on the jacks (most likely in the air) the RMG won’t = lock=20 in.

Slight pressure = on the wheel=20 locks it in, which is handy if one wing walks upside=20 down.

Disconnected the = actuator=20 strut and it drops like a beauty and snaps into=20 position.

I doubt the = actuator struts=20 are the problem because both main gear have exhibited the same problem = at the=20 same time. The LMG does eventually lock down on the=20 jacks.

One thing = I’ve noticed is the=20 NG is slower to lock down under normal extension than it usually does. = Until=20 recently, it was always the first, and quick to lock down. Under free = fall the=20 gas strut dives the NG down and locks as it should quite=20 quickly.

Wondered if = anyone might have=20 a trouble shooting sequence I can draw upon.

Thanks

Dom=20 Crain

VH-CZJ

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