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 imr-da01.mx.aol.com ([205.188.105.143] verified) by logan.com (CommuniGate Pro SMTP 5.4c1) with ESMTP id 4760142 for lml@lancaironline.net; Tue, 18 Jan 2011 09:55:29 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.143; envelope-from=MikeEasley@aol.com Received: from mtaomg-db01.r1000.mx.aol.com (mtaomg-db01.r1000.mx.aol.com [172.29.51.199]) by imr-da01.mx.aol.com (8.14.1/8.14.1) with ESMTP id p0IEsllt004257 for ; Tue, 18 Jan 2011 09:54:47 -0500 Received: from core-mka001b.r1000.mail.aol.com (core-mka001.r1000.mail.aol.com [172.29.102.65]) by mtaomg-db01.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 1DAB1E000086 for ; Tue, 18 Jan 2011 09:54:47 -0500 (EST) From: MikeEasley@aol.com X-Original-Message-ID: <16ac5.43e1237b.3a6703b6@aol.com> X-Original-Date: Tue, 18 Jan 2011 09:54:47 -0500 (EST) Subject: Re: [LML] Re: elevator trim speed (TruTrak) Safety Trim X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_16ac5.43e1237b.3a6703b6_boundary" X-Mailer: AOL 9.5 sub 5401 X-AOL-IP: 75.71.55.189 X-Originating-IP: [172.29.54.159] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:457203168:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d33c74d35a9b725f8 --part1_16ac5.43e1237b.3a6703b6_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Doug, I installed the Safety Trim on my ES a couple years ago and I love it. I had Robert at Lancair make the custom switch for my panel with TRIM ON and TRIM REV (momentary). I used the airspeed switch to set the high/low point at the top of the white arc. So I have full speed trim in the pattern and slower trim speed in cruise. No more tapping! It also has a 3 second cutoff to prevent run-away trim. It has all the circuitry for both pilot and copilot switches. I think it's a great product. Mike Easley Colorado Springs In a message dated 1/17/2011 7:57:34 A.M. Mountain Standard Time, douglasbrunner@earthlink.net writes: Paul, This is a problem experienced by other Legacy pilots. I am also a 28V plane, but don't think the problem is due to the voltage. My trim speed is good for takeoff and landing, but way too fast for cruise. I have adapted to it by learning to "blip" the trim in flight. Ideally, trim would be two speed, or even continuously adjustable based on airspeed. There is a product that I considered installing that dealt with this issue. http://www.tcwtech.com/Safety-Trim-Page.htm My understanding is that it works off an airspeed switch that you can set to a particular speed such as 160 knot - above that speed the trim works more slowly - below that speed more quickly. Other people have put in simple switches that are not tied to airspeed. Of course that could lead to one forgetting to reset for landing. Doug Brunner -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of paul miller Sent: Saturday, January 15, 2011 10:11 AM To: lml@lancaironline.net Subject: [LML] elevator trim speed (TruTrak) On my Legacy I have the 2004 Trutrak autotrim system with a DFC250 28v and all works well. The trim speed is very fast such that a bump of the switch sets up a big pitch change. I measure the full up to full down travel time which is adjustable on the module from 5-8 seconds only--very fast. My certified aircraft run 30-40 seconds. I wrote Trutrak and they said the unit has to come back because it says 24v but may be wired for only 12v. I measured the voltage to the unit and it is fed 28v. If you have one and have similar trim speeds you might want to think about a fix because there is nothing in the wiring diagrams that would suggest an error in installation. The diagram inputs show 12-24v to the unit. I'd be interested in travel times for other Legacy trims for comparison. Paul L2K-186 -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html --part1_16ac5.43e1237b.3a6703b6_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Doug,
 
I installed the Safety Trim on my ES a couple years ago and I love=20 it.  I had Robert at Lancair make the custom switch for my panel with = TRIM=20 ON and TRIM REV (momentary).  I used the airspeed switch to set the=20 high/low point at the top of the white arc.  So I have full speed trim= in=20 the pattern and slower trim speed in cruise.  No more tapping!  I= t=20 also has a 3 second cutoff to prevent run-away trim.  It has all = the=20 circuitry for both pilot and copilot switches.  I think it's a great= =20 product.
 
Mike Easley
Colorado Springs
 
In a message dated 1/17/2011 7:57:34 A.M. Mountain Standard Time,=20 douglasbrunner@earthlink.net writes:
Paul,

This is a problem experienced by other Legacy= =20 pilots.

I am also a 28V plane, but don't think the problem is due = to=20 the voltage.
My trim speed is good for takeoff and landing, but way to= o=20 fast for cruise.
I have adapted to it by learning to "blip" the trim i= n=20 flight.

Ideally, trim would be two speed, or even continuously=20 adjustable based on
airspeed.  There is a product that I consider= ed=20 installing that dealt with
this issue. =20

http://www.tcwtech.com/Safety-Trim-Page.htm

My understandi= ng is=20 that it works off an airspeed switch that you can set to
a particular = speed=20 such as 160 knot - above that speed the trim works more
slowly - below= that=20 speed more quickly.

Other people have put in simple switches that = are=20 not tied to airspeed.  Of
course that could lead to one forgettin= g to=20 reset for landing.

Doug Brunner

-----Original=20 Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net]= On=20 Behalf Of paul
miller
Sent: Saturday, January 15, 2011 10:11 AM
= To:=20 lml@lancaironline.net
Subject: [LML] elevator trim speed=20 (TruTrak)

On my Legacy I have the 2004 Trutrak autotrim system wit= h a=20 DFC250 28v and
all works well.  The trim speed is very fast such = that=20 a bump of the switch
sets up a big pitch change.  I measure the f= ull=20 up to full down travel time
which is adjustable on the module from 5-8= =20 seconds only--very fast.  My
certified aircraft run 30-40=20 seconds.  I wrote Trutrak and they said the
unit has to come back= =20 because it says 24v but may be wired for only 12v.   I
measu= red=20 the voltage to the unit and it is fed 28v.  If you have one and
h= ave=20 similar trim speeds you might want to think about a fix because there
= is=20 nothing in the wiring diagrams that would suggest an error=20 in
installation.  The diagram inputs show 12-24v to the unit.&nbs= p;=20 I'd be
interested in travel times for other Legacy trims for=20 comparison.

Paul
L2K-186 
--
For archives and unsub= =20 http://mail.lancaironline.net:81/lists/lml/List.html


--
For= =20 archives and unsub=20 http://mail.lancaironline.net:81/lists/lml/List.html
--part1_16ac5.43e1237b.3a6703b6_boundary--