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g-iani(at)ntlworld.com
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 Posted: Sun Jun 03, 2012 1:05 am Post subject: Trutrak or Trio Autopilot? |
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Andrew
Why do you say the Trio servo looks better?
The Trio servo is of the old analogue design while the TruTrak is a digital stepper motor with far less to go wrong, wear out or fail. The fact that Garmin, Dynon and others have decided to use the same unit (although they are not electrically interchangeable) say a lot.
Ian Rickard G-IANI XS Trigear, 300hours
Europa Club Mods Specialist
e-mail g-iani(at)ntlworld.com
[quote][b]
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grahamsingleton(at)btinte
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| Posted: Sun Jun 03, 2012 1:48 am Post subject: Trutrak or Trio Autopilot? |
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Ian
I agree with you. The Navaid servo adopted by Trio has nylon gears, soldered cable joints sheet aluminium chassis
and looks very "steam age" to me. It first came on the market about 25 years ago.
Graham
From: G-IANI <g-iani(at)ntlworld.com>
To: europa-list(at)matronics.com
Sent: Sunday, 3 June 2012, 10:04
Subject: RE: Trutrak or Trio Autopilot?
Andrew
Why do you say the Trio servo looks better?
The Trio servo is of the old analogue design while the TruTrak is a digital stepper motor with far less to go wrong, wear out or fail. The fact that Garmin, Dynon and others have decided to use the same unit (although they are not electrically interchangeable) say a lot.
Ian Rickard G-IANI XS Trigear, 300hours
Europa Club Mods Specialist
e-mail g-iani(at)ntlworld.com
[quote]ht; http://www.matronics.com/contrib===============
[b]
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budyerly(at)msn.com
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| Posted: Sun Jun 03, 2012 7:29 am Post subject: Trutrak or Trio Autopilot? |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Andrew,
Allied Electrical has 90 degree D sub connectors available which reduces the TruTrak electrical connector overall length. I use these on the Dynon and other long EFIS types and radios if there is a clearance problem. The length is cut about one inch. In the mono, the ply seat support normally is cut out for the connector and a hole cover could be made and or a bump manufactured in the ply/glass to make room for the connector and still clear the wheel and brake during retraction in the mono. After all, we had to move the rudder cables in to clear and I am sure your TT roll servo will clear with a 90 degree connector.
At my shop we mount the roll servo in the aircraft with the arm attached to the stick. The servo mounts to a aluminum plate attached to the inboard access hole inboard of the passenger stick. A metal bracket is manufactured for attachment to the current stick yolk. Clean neat and simple install, but you must make a kick panel to cover the mechanism to protect the control arm. I install on the passenger side, but it works on the pilot side as well. Just a mirror image. For pitch, until this mod came out, we attached the pitch servo to the tube behind the baggage bay. Not optimum for maintenance but safe and doable with more work than I'd like to admit.
As for the Mod 76 pitch mod, it is quite clever and does pose a sticky fit. Again, as above, the photo in the Mod 76 instruction shows the servo back of the TruTrack hard against the seat vertical support lying on the floor with the D-sub protruding into the mono wheel well. The wheel normally clears, if memory serves, the pilot side by some two inches when using the 7 inch tire. This space allowed us to install the airbrake system into the mono which also protrudes into the tunnel. By guessing, the plywood is 1/8 inch and the hood is 1.5 inch leaving the hood to protrude into the mono by about 1.25 inches. An alternative mounting would be to install the servo vertically on a metal plate to the access hole in the front of the seat using approved mounting techniques, which would raise the connector to allow a bit more clearance from the floor giving the mono gear frame a wider birth. Just flip the bracket over. Also by disconnecting the arm from the shaft, the MM3 style bearing can fit on the inside of the servo arm but your bolt may need to be changed to a washer head 525 screw type for clearance. This gives another 1/2 inch of clearance. Not worth the effort in my opinion as future maintenance would be uncomfortable, but I have done it for solving clearance issues. You will have to cover the connector/wires in the wheel well to prevent dirt/water and the like from damaging the electrics for sure. Please do some measuring of your aircraft before buying as no two aircraft are exactly alike.
I have never installed a Trio but I hear good things about them, I just like the TruTrak for the attitude style display, ball, and servo toughness, but there are issues with electrical reliability as I have had two units that died within the first few hours of operation due to circuit card mounting problems during assembly at the factory. That is a 50% failure rate in my shop. Each has been fixed and works well now. I just could be unlucky.
Regards,
Bud Yerly
Custom Flight Creations, Inc.
www.customflightcreations.com
(813) 653-4989
[quote] ---
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rowlandcarson(at)gmail.co
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| Posted: Sun Jun 03, 2012 10:45 am Post subject: Trutrak or Trio Autopilot? |
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On 3 Jun 2012, at 15:18, Andrew Sarangan wrote:
| Quote: | Mod 76 says the Trutrak servo won't fit inside the thigh support compartment because the D-type connector is at the back of the servo and will stick out into the tunnel. So for the monowheel this won't work. I am a bit surprised that the connector cannot be modified somehow. But I don't have a Trutrak servo on hand to come up with a different plan. Does anyone have thoughts on this?
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Andrew - here attached is a picture of my approach to the issue of the protruding D-type connector on the TruTrak servo for my wing-leveller installation. It's a short length of aluminium angle with holes made to suit male & female 9-way connectors. The interconnexions are made with solid copper wire (can't remember what gauge fitted the solder buckets nicely) and I will add an insulating cover before installation.
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson(at)gmail.com> http://www.rowlandcarson.org.uk
| Skype, Twitter: rowland_carson Facebook: Rowland Carson
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g-iani(at)ntlworld.com
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| Posted: Sun Jun 03, 2012 1:58 pm Post subject: Trutrak or Trio Autopilot? |
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Andrew
I added the simplistic statement “the Trutrak servo won't fit inside the thigh support” when I wrote the Mod because I did not have a either a Mono to work with or the time to develop it. Here in the UK I have to work with a demanding regulator (the LAA) and would have had to demonstrate that what I was writing up really does work well.
What you have not seen yet is that Mod 76 issue 3. This adds the Dynon to the approved list. The Dynon servos will fit easily as the electronics are inside the gear box (not in a separate box on the side). I finished it months ago at the request of the LAA (as various builders wanted the Dynon) but Europa have yet to get round to publishing it.
Bud’s advice is good. There are various ways which the altitude hold can be achieved. Bud has referred to “attached the pitch servo to the tube behind the baggage bay”. It was decided that this was not really suitable for all aircraft but it has been approved as an individual Mod on one aircraft (and could be used again). I did the drawings for this mod which are attached. As you will see the servo used was a Trio but any one would fit as well. If this is of interest please contact me direct if you want more details.
Ian Rickard G-IANI XS Trigear, 300hours
Europa Club Mods Specialist
e-mail g-iani(at)ntlworld.com
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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THAutopilot_(2).pdf |
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118.39 KB |
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296 Time(s) |
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THAutopilot(1).pdf |
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klinefelter.kevin(at)gmai
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| Posted: Sun Jun 03, 2012 4:06 pm Post subject: Trutrak or Trio Autopilot? |
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Hi All,
I installed the TruTrak under the passenger seat in my mono and it all fit without any problem. I did not need to modify the space at all.
I cut an access hole in the seat bottom and made a cover for the front existing access hole.
I don't yet have a pitch servo, but Ian's drawing sure looks good!
This autopilot coupled with the GPS has me totally spoiled.
Kevin
On Jun 3, 2012, at 2:54 PM, "G-IANI" <g-iani(at)ntlworld.com (g-iani(at)ntlworld.com)> wrote:
[quote] <![endif]--> <![endif]-->
Andrew
I added the simplistic statement “the Trutrak servo won't fit inside the thigh support” when I wrote the Mod because I did not have a either a Mono to work with or the time to develop it. Here in the UK I have to work with a demanding regulator (the LAA) and would have had to demonstrate that what I was writing up really does work well.
What you have not seen yet is that Mod 76 issue 3. This adds the Dynon to the approved list. The Dynon servos will fit easily as the electronics are inside the gear box (not in a separate box on the side). I finished it months ago at the request of the LAA (as various builders wanted the Dynon) but Europa have yet to get round to publishing it.
Bud’s advice is good. There are various ways which the altitude hold can be achieved. Bud has referred to “attached the pitch servo to the tube behind the baggage bay”. It was decided that this was not really suitable for all aircraft but it has been approved as an individual Mod on one aircraft (and could be used again). I did the drawings for this mod which are attached. As you will see the servo used was a Trio but any one would fit as well. If this is of interest please contact me direct if you want more details.
Ian Rickard G-IANI XS Trigear, 300hours
Europa Club Mods Specialist
e-mail g-iani(at)ntlworld.com (g-iani(at)ntlworld.com)
<THAutopilot (2).pdf>
<THAutopilot(1).pdf>
[b]
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