X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 18 Jan 2011 11:49:10 -0500 Message-ID: X-Original-Return-Path: Received: from raven.ravenwebhosting.com ([72.9.254.67] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTPS id 4677894 for lml@lancaironline.net; Mon, 17 Jan 2011 17:58:21 -0500 Received-SPF: none receiver=logan.com; client-ip=72.9.254.67; envelope-from=paul@tbm700.com Received: from 111-57.202-68.tampabay.res.rr.com ([68.202.57.111]:53513 helo=[192.168.1.102]) by raven.ravenwebhosting.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.69) (envelope-from ) id 1Pey1C-0005Fm-3N for lml@lancaironline.net; Mon, 17 Jan 2011 17:57:46 -0500 From: paul miller Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: multipart/alternative; boundary=Apple-Mail-7--829717364 Subject: Re: [LML] Re: elevator trim speed (TruTrak) X-Original-Date: Mon, 17 Jan 2011 15:57:42 -0700 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: X-Mailer: Apple Mail (2.1082) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - raven.ravenwebhosting.com X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tbm700.com X-Source: X-Source-Args: X-Source-Dir: --Apple-Mail-7--829717364 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii This is the response from Trutrak regarding the 12v issue for autotrim = units driving the Ray Allen trim servo and why they would like to have = it returned. > No, we can't modify the autotrim to ONLY output 12V, it will still = output whatever is put into it. However, the older autotrim is not = suitable for sustained 24V input. When a current load is put on it at = 24V, it's lifespan is shortened. The new model (which is wired the same = way) is able to handle 5A @ 24V. We'll take a look at yours and most = likely exchange it for a new version. In the meantime, you'll want to = set up a convertor in your aircraft to bring the input voltage down to = 12V. RMA to follow soon. Thanks! So Doug, I would send him the s/n on your unit to see if it is "at = risk". This means it won't address my trim speed issue until I reduce = the voltage to 12v or establish a PWM interface (bi-directional dc motor = pwm schematic with airspeed switch input, anyone?) but it will prevent = some form of failure they must be concerned about. Paul Legacy 186 On 2011-01-17, at 7:57 AM, Douglas Brunner wrote: > Paul, >=20 > This is a problem experienced by other Legacy pilots. >=20 --Apple-Mail-7--829717364 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii This = is the response from Trutrak regarding the 12v issue for autotrim units = driving the Ray Allen trim servo and why they would like to have it = returned.

No, we can't modify the autotrim = to ONLY output 12V, it will still output whatever is put into it. = However, the older autotrim is not suitable for sustained 24V input. = When a current load is put on it at 24V, it's lifespan is shortened. The = new model (which is wired the same way) is able to handle 5A @ 24V. = We'll take a look at yours and most likely exchange it for a new = version. In the meantime, you'll want to set up a convertor in your = aircraft to bring the input voltage down to 12V. RMA to follow soon. = Thanks!

So Doug, I would send him = the s/n on your unit to see if it is "at risk".   This means it = won't address my trim speed issue until I reduce the voltage to 12v or = establish a PWM interface (bi-directional dc motor pwm schematic with = airspeed switch input, anyone?) but it will prevent some form of failure = they must be concerned = about.

Paul
Legacy = 186
On 2011-01-17, at 7:57 AM, Douglas Brunner = wrote:

Paul,

This is a problem experienced by other = Legacy pilots.


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