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dlm46007(at)cox.net
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 Posted: Wed Nov 21, 2007 9:35 pm Post subject: Trutrak AP |
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I have have the Digiflite II V2.20. The aircraft is not flying; roll servo harness is in dsub for wing connection. pitch servo harness is connected to the elevator control horn. When testing the controller, I find that the units turns on and properly indicates when receiving the GPS signal. The Problem is that the ALT Hold function can not be disengaged without going into setup mode and and turning off the pitch servo altogether. Is something wrong with the harness? the unit? or are these strange results in response to a system only partially connected? TT has updated the software once already and the aircraft has not left the garage.
[quote][b]
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Wed Nov 21, 2007 10:21 pm Post subject: Trutrak AP |
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David,
I've got good news, and bad news. The bad news is that yes, that's
the way it works. If you want no ALT hold, then you have to
hold the ALT button down until you're in the config menu
and just set it to not be on. I'm not sure why they
didn't make it able to be a wing leveler only, but other than
that method, there isn't a way that I've found.
There's more bad news... Version 2.20 is not going to be what
you'll want to fly with considering you have a good vertically
integrated system. 2.20 contains the rounding bug that will
cause pitch oscillations. So, perhaps before you get too far
along and into that pre-first-flight crunch, you may want to
get it up to at least 2.24, which does work well.
Now, for the good news... I haven't found that there's really
been much for times that I care about the seemingly goofy
step of turning the ALT hold off. Once you hook that AP to
the EFIS for doing your flights, you'll be able to set
altitude preselects on your Chelton, it will climb to altitude,
do your descents, both lateral and vertical controlling, heading
mode, and pretty much anything you would want. The only time
it would be at all handy to have the ALT hold off is if you
for some reason really want to hand fly the altitude only, but
let the EFIS or AP take care of the lateral steering....which
would kind of be strange since you HAVE the functionality to
make life easy. Plus, for those few times when you really
just want to get the climb going right away, the EFIS makes
hand flying so easy that you can just disengage the AP and
it's still easy. I know, you probably think the whole
situation sucks right now....but just wait until you fly
it...it works very well.
Tim Olson - RV-10 N104CD - Flying
do not archive
David McNeill wrote:
| Quote: | I have have the Digiflite II V2.20. The aircraft is not flying; roll
servo harness is in dsub for wing connection. pitch servo harness is
connected to the elevator control horn. When testing the controller, I
find that the units turns on and properly indicates when receiving the
GPS signal. The Problem is that the *ALT Hold* function can not be
disengaged without going into setup mode and and turning off the pitch
servo altogether. Is something wrong with the harness? the unit? or are
these strange results in response to a system only partially
connected? TT has updated the software once already and the aircraft has
not left the garage.
*
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pcasson(at)sasktel.net
Guest
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| Posted: Thu Nov 22, 2007 5:54 am Post subject: Trutrak AP |
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Pretty darn sure pressing “Alt” a 2nd time would turn off Alt Hold on my unit. Not sure what version I’m running but will check later today.
Perry
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of David McNeill
Sent: Wednesday, November 21, 2007 11:29 PM
To: rv10-list(at)matronics.com
Subject: Trutrak AP
I have have the Digiflite II V2.20. The aircraft is not flying; roll servo harness is in dsub for wing connection. pitch servo harness is connected to the elevator control horn. When testing the controller, I find that the units turns on and properly indicates when receiving the GPS signal. The Problem is that the [b]ALT Hold[/b] function can not be disengaged without going into setup mode and and turning off the pitch servo altogether. Is something wrong with the harness? the unit? or are these strange results in response to a system only partially connected? TT has updated the software once already and the aircraft has not left the garage.
| Quote: | | http://www.matronics.com/contributionhttp://www.matronics.com/Navigator?RV10-Listhttp://forums.matronics.com |
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Thu Nov 22, 2007 6:21 am Post subject: Trutrak AP |
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Yeah, now David sent me a manual to skim over and that's what
it said in the manual. But, what I think we're seeing here is
the difference in variation between TruTrak Digiflight II models.
I/we have the VSGV model, which has both lateral and vertical
hold and heading select, climb/descent speed select, and GPSS/GPSV
modes. On that model, with GPSV, the AP is always in a mode with 2 axis
being controlled. If you tap the ALT button it toggles between GPSV
and HOLD (or vertical command) modes. There is no way out except
to disable the servo. It seems like a big limitation but in
practice it isn't.
Now, if you have a model like the VSG, or something lesser than
VSGV, then I would bet that this is why the discrepancy because
for those, when you tap ALT, it would not have a GPSV mode to
select. So that kind of explains why yours would be one way and
his/ours would be another. The only people who would benefit
from the VSGV are people who have an EFIS or 480 type system
that can drive the AP vertically...but that's kind of a huge
benefit.
Tim Olson - RV-10 N104CD - Flying
do not archive
Perry Casson - Home wrote:
| Quote: | Pretty darn sure pressing “Alt” a 2^nd time would turn off Alt Hold on
my unit. Not sure what version I’m running but will check later today.
Perry
------------------------------------------------------------------------
*From:* owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] *On Behalf Of *David McNeill
*Sent:* Wednesday, November 21, 2007 11:29 PM
*To:* rv10-list(at)matronics.com
*Subject:* Trutrak AP
I have have the Digiflite II V2.20. The aircraft is not flying; roll
servo harness is in dsub for wing connection. pitch servo harness is
connected to the elevator control horn. When testing the controller, I
find that the units turns on and properly indicates when receiving the
GPS signal. The Problem is that the **ALT Hold** function can not be
disengaged without going into setup mode and and turning off the pitch
servo altogether. Is something wrong with the harness? the unit? or are
these strange results in response to a system only partially
connected? TT has updated the software once already and the aircraft has
not left the garage.
* *
* *
*http://www.matronics.com/contribution*
*http://www.matronics.com/Navigator?RV10-List*
*http://forums.matronics.com*
* *
|
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scottmschmidt(at)yahoo.co
Guest
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| Posted: Thu Nov 22, 2007 10:01 am Post subject: Trutrak AP |
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David. EFIS are you using. With the update to .24 it will work great with the Chelton. I recently have been flying with my Grand Rapids as well and the altitude function for climbing and holding works just as good if not better.
Scott Schmidt
scottmschmidt(at)yahoo.com
On Nov 21, 2007, at 11:20 PM, Tim Olson <Tim(at)MyRV10.com> wrote:
David,
I've got good news, and bad news. The bad news is that yes, that's
the way it works. If you want no ALT hold, then you have to
hold the ALT button down until you're in the config menu
and just set it to not be on. I'm not sure why they
didn't make it able to be a wing leveler only, but other than
that method, there isn't a way that I've found.
There's more bad news... Version 2.20 is not going to be what
you'll want to fly with considering you have a good vertically
integrated system. 2.20 contains the rounding bug that will
cause pitch oscillations. So, perhaps before you get too far
along and into that pre-first-flight crunch, you may want to
get it up to at least 2.24, which does work well.
Now, for the good news... I haven't found that there's really
been much for times that I care about the seemingly goofy
step of turning the ALT hold off. Once you hook that AP to
the EFIS for doing your flights, you'll be able to set
altitude preselects on your Chelton, it will climb to altitude,
do your descents, both lateral and vertical controlling, heading
mode, and pretty much anything you would want. The only time
it would be at all handy to have the ALT hold off is if you
for some reason really want to hand fly the altitude only, but
let the EFIS or AP take care of the lateral steering....which
would kind of be strange since you HAVE the functionality to
make life easy. Plus, for those few times when you really
just want to get the climb going right away, the EFIS makes
hand flying so easy that you can just disengage the AP and
it's still easy. I know, you probably think the whole
situation sucks right now....but just wait until you fly
it...it works very well.
Tim Olson - RV-10 N104CD - Flying
do not archive
David McNeill wrote:
I have have the Digiflite II V2.20. The aircraft is not flying; roll servo harness is in dsub for wing connection. pitch servo harness is connected to the elevator control horn. When testing the controller, I find that the units turns on and properly indicates when receiving the GPS signal. The Problem is that the *ALT Hold* function can not be disengaged without going into setup mode and and turning off the pitch servo altogether. Is something wrong with the harness? the unit? or are these strange results in response to a system only partially connected? TT has updated the software once already and the aircraft has not left the garage.
*
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http://www.matronics.com/Navigator?RV10-List |
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etekberg(at)gmail.com
Guest
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| Posted: Sun Nov 25, 2007 3:57 am Post subject: Trutrak AP |
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Just as another datapoint, my alt hold won't turn off either on my VS (or VSG - I don't recall). I read through the manual several times and eventually reached the conclusion that the problem wasn't with me. I've been meaning to investigate further, but haven't gotten around to it.
On Nov 22, 2007 7:54 AM, Perry Casson - Home <pcasson(at)sasktel.net (pcasson(at)sasktel.net)> wrote:
[quote]
Pretty darn sure pressing "Alt" a 2nd time would turn off Alt Hold on my unit. Not sure what version I'm running but will check later today.
Perry
From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of David McNeill
Sent: Wednesday, November 21, 2007 11:29 PM
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Subject: Trutrak AP
I have have the Digiflite II V2.20. The aircraft is not flying; roll servo harness is in dsub for wing connection. pitch servo harness is connected to the elevator control horn. When testing the controller, I find that the units turns on and properly indicates when receiving the GPS signal. The Problem is that the [b]ALT Hold[/b] function can not be disengaged without going into setup mode and and turning off the pitch servo altogether. Is something wrong with the harness? the unit? or are these strange results in response to a system only partially connected? TT has updated the software once already and the aircraft has not left the garage.
[b]
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Nuisance
Joined: 10 Jan 2006
Posts: 9
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| Posted: Mon Dec 03, 2007 7:26 am Post subject: Re: Trutrak AP |
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If you have a "VS" or above (more letters), the ALT HOLD or SVS (select vertical speed) is on any time the autopilot is engaged, unless you go into the vertical setup screen and turn Pitch OFF.
It is assumed that if you buy the vertical speed capable autopilot, you will use that function for climbing and ascending. Only the base DF-II will do ALT HOLD only in response to the ALT button.
John
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