X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 19 Mar 2014 10:34:51 -0400 Message-ID: X-Original-Return-Path: Received: from nm27-vm5.access.bullet.mail.gq1.yahoo.com ([216.39.63.145] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 6786943 for lml@lancaironline.net; Wed, 19 Mar 2014 10:29:40 -0400 Received-SPF: none receiver=logan.com; client-ip=216.39.63.145; envelope-from=anpfield@sbcglobal.net Received: from [216.39.60.165] by nm27.access.bullet.mail.gq1.yahoo.com with NNFMP; 19 Mar 2014 14:29:07 -0000 Received: from [67.195.23.145] by tm1.access.bullet.mail.gq1.yahoo.com with NNFMP; 19 Mar 2014 14:29:07 -0000 Received: from [127.0.0.1] by smtp117.sbc.mail.gq1.yahoo.com with NNFMP; 19 Mar 2014 14:29:06 -0000 X-Yahoo-Newman-Id: 963696.82856.bm@smtp117.sbc.mail.gq1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: Yv2DBHcVM1lrpQ_UBGoID6fS3fJUJ.CXBDrIQ7bvq9XhlcW vhzUnnRghEz9rfBTfPSRq_OIWDIGMiEfp6XObA0HwpWWiiVN3h0rWyp6hiUF pu2WA1SdApM8IvR.u8wdTQZoL8HzDSJz6OGByG0_ss3TUWSN3HHOeNJYRWI2 UT7dJAjMzuN9N4vIoQDlZeKyP8bz0hwyOr.u4xuCfp3glMjDo77yWx0OJR4U FOBgnXfWR_YVmWuIpm1KdjsCBdHwBfmWmgo9j2Thh2mZJvqwBMN42fkuqscV YMpmXBNSG07gJAmv6AdLKYvVJBnfTo3ba.x2GfCsZ.2C0N.BLcVgmQJKvT34 GEfwm9ToTiNbBVPzTSJFQhEydu0Fc1kbtp9gQY4YQJaeqfXshd64wYH2tl1l qwqWkkp3Zo5CVjHjAJjjph8n6SIh4fEo5sjbbIlwoE_MFKB9W3Bz7Gf7KCgt hlXM9lHg8CKymnu.regVZsw.N5CepqbV8466WdAJIJTbxwOIntw3hPZNOLsj qwjmBPHPezydL1lPRbMBP6RyR2uCw00oJosVyq5WCvNFrbHnTX1m3aT7cSvD GYOKAHLr7bX02lAE- X-Yahoo-SMTP: M2dqCgKswBDQjE8MoF8jSmCdTsUI2v7j63ZxcFoNP0Q8o1U- X-Rocket-Received: from petefieldaviati (anpfield@99.50.108.128 with plain [67.195.15.66]) by smtp117.sbc.mail.gq1.yahoo.com with SMTP; 19 Mar 2014 14:29:06 +0000 UTC From: "Pete Field" X-Original-To: "'John Barrett'" <2thman1@gmail.com>, References: In-Reply-To: Subject: RE: [LML] Autopilot servos and L360 bobweight X-Original-Date: Wed, 19 Mar 2014 09:29:08 -0500 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01AD_01CF4355.AEE99AE0" X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQHV09ymzDY7Xt1LyQmE9SsYec5nKJrbU3WA Content-Language: en-us Disposition-Notification-To: "Pete Field" This is a multipart message in MIME format. ------=_NextPart_000_01AD_01CF4355.AEE99AE0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable All: =20 Let=E2=80=99s be careful about what we are saying here. The bob weight = in the LNC2 control system is a classic =E2=80=9Cforward bob = weight=E2=80=9D its location in the longitudinal control system is as if = it were attached to the front of the stick on an arm. Its purpose is to = resist the onset of g forces by making the stick harder to pull aft. = Its purpose has nothing to do with flutter. =20 =20 Actual control surface balancing is done with the over balance = extensions on the outer edges of the elevator. I do not think it is = wise to fiddle with the bob weight, remove it, or alter its mass. =20 I have a Trio autopilot in my LNC2 and it is =E2=80=9Cnervous=E2=80=9D = in pitch control, especially at the more aft allowable CG=E2=80=99s. I = use a nylon collar to attach the linkage to the pitch servo. I believe = I have a little too much lash in that linkage and need to tighten things = up. =20 =20 =20 Regards,=20 Pete Field LNC2, St. Louis =20 =20 =20 From: John Barrett [mailto:2thman1@gmail.com]=20 Sent: Tuesday, March 18, 2014 9:41 AM To: lml@lancaironline.net Subject: Re: [LML] Autopilot servos and L360 bobweight =20 Bob weight is there to balance the control surface . Out of balance can = carry risk of flutter. Be sure to research before changing that = relationship. =20 John Sent from my iPad =20 On Mar 18, 2014, at 6:52 AM, "Jack Dysart" wrote: My Tru Trak autopilot altitude hold is inconsistent, and opinions are = that the servo had difficulty working properly because of the mass of = the bobweight on the elevator idler arm. One possibility is to remove = the weight and expect more pitch sensitivity (lighter stick force) in = turns. Has anyone found other alternatives? What if the mass of the bobweight is reduced? =20 My servo is behind the seat and connected to a ring clamp on the = elevator control tube with a smaller, roughly parallel, rod with bearing = ends. =20 Jack Dysart =20 ------=_NextPart_000_01AD_01CF4355.AEE99AE0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

All:<= /span>

 

Let=E2=80=99s = be careful about what we are saying here.=C2=A0 The bob weight in the = LNC2 control system is a classic =E2=80=9Cforward bob weight=E2=80=9D = its location in the longitudinal control system is as if it were = attached to the front of the stick on an arm.=C2=A0 Its purpose is to = resist the onset of g forces by making the stick harder to pull = aft.=C2=A0 Its purpose has nothing to do with flutter.=C2=A0 =

 

Actual control = surface balancing is done with the over balance extensions on the outer = edges of the elevator.=C2=A0 I do not think it is wise to fiddle with = the bob weight, remove it, or alter its mass.

 

I have a Trio = autopilot in my LNC2 and it is =E2=80=9Cnervous=E2=80=9D in pitch = control, especially at the more aft allowable CG=E2=80=99s.=C2=A0 I use = a nylon collar to attach the linkage to the pitch servo.=C2=A0 I believe = I have a little too much lash in that linkage and need to tighten things = up.=C2=A0

 

 

Regards, =

Pete = Field

LNC2, St. = Louis=C2=A0

 

 

From:= = John Barrett [mailto:2thman1@gmail.com]
Sent: Tuesday, March = 18, 2014 9:41 AM
To: lml@lancaironline.net
Subject: = Re: [LML] Autopilot servos and L360 = bobweight

 

Bob = weight is there to balance the control surface . Out of balance can = carry risk of flutter.  Be sure to research before changing that = relationship.

 

John

Sent from my iPad

 


On Mar 18, 2014, at = 6:52 AM, "Jack Dysart" <jldysart1@gmail.com> = wrote:

My Tru Trak autopilot altitude hold is inconsistent, = and opinions are that the servo had difficulty working properly because = of the mass of the bobweight on the elevator idler arm.  One = possibility is to remove the weight and expect more pitch sensitivity = (lighter stick force) in turns.  Has anyone found other = alternatives?

What if the mass of the = bobweight is reduced?

 

My servo is = behind the seat and connected to a ring clamp on the elevator control = tube with a smaller, roughly parallel, rod with bearing = ends.

 

Jack Dysart =    

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