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  #11  
Old 01-04-2010, 01:27 AM
Rainier Lamers Rainier Lamers is offline
 
Join Date: May 2007
Location: Somerset West
Posts: 945
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Sorry,
I have not been following Vans for a while so here is my belated answer (yes, I'm back from the holiday !).

Unfortunately we can only support Trio servos and our own (which are now in final prototype and should be flying within a week).
We did ask Trutrak but our request was turned down. We were offered a similar package to AFS (i.e. branded version of the complete Trutrak AP) but decided not to go that way as it would be at a cost that is not compatible with what we like to see.
This then effectively caused the go-ahead to design our own servo.
This does not mean that we will stop supporting the Trio servo in any way but rather that our own servo will complement the Trio servo. In effect you can then choose either a DC motor, clutch based servo (trio) or a stepper motor based solution (MGL) as you like. That means more choice and that is the way I like it.

Rainier
CEO MGL Avionics

Quote:
Originally Posted by Darren S View Post
Happy New Year to everyone,

I am planning my panel. I have an MGL Enigma that I plan on using with my -7. The half built kit I bought came with two Trutrak servos. A roll servo in the right wing and a pitch servo behind the baggage compartment.

Some of my research has me thinking that the Enigma can't run the Trutrak servos. MGL support Trio servos, not Trutrak. Best I can figure.

I emailed SteinAir to see if they make a wiring harness to interface the Enigma and the servos, but I haven't heard back yet. It's the weekend so I likely won't hear till next week.

So...... anybody out there using an Enigma or other MGL product with Trutrak servos ?

Thanks,

Darren
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  #12  
Old 01-04-2010, 10:28 AM
rv72004 rv72004 is offline
 
Join Date: Nov 2005
Posts: 452
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Rainier , when will you have specs on your servos? Sound promising. Will you also offer stand alone autopilots?
And while I have your attention, any news of producing a transponder ?
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EJ
RV7 flying
xp360, CS, All Glass cockpit

Last edited by rv72004 : 01-04-2010 at 10:30 AM.
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  #13  
Old 01-06-2010, 07:32 AM
nicolcarstens nicolcarstens is offline
 
Join Date: Apr 2007
Location: Cape Town, South Africa
Posts: 54
Default MGL Servo & Autopilot Update

Hi guys,
Quote:
Originally Posted by rv72004 View Post
Rainier, when will you have specs on your servos? Sound promising.
We have preliminary specs on the two servo models (a larger and a smaller one). I am a little hesitant to announce it publicly just yet... What I can say: the smaller one should be perfect for most RV's, and the larger one for L-29/39's!! The servos are currently being test flown.

Realistically they should be going into production towards the end of February 2010.

If you need more information, you are welcome to contact us via PM/email.

Quote:
Originally Posted by rv72004 View Post
Will you also offer stand alone autopilots?
We are looking into it... More along the lines of a REALLY small, low cost EFIS with autopilot.

Quote:
Originally Posted by rv72004 View Post
And while I have your attention, any news of producing a transponder ?
Sorry: due to the volume and cost of the red tape required, no change in status on this one! Indefinitely on hold.

Watch this space!
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Nicol Carstens
R&D Engineer with MGL Avionics
www.mglavionics.co.za
www.mglavionics.com

Last edited by nicolcarstens : 01-06-2010 at 07:37 AM. Reason: adding info
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  #14  
Old 01-06-2010, 11:34 AM
ron sterba ron sterba is offline
 
Join Date: May 2007
Location: salem Oregon
Posts: 925
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Hello Bob
I'am building a QB9A and I was wondering if you have Fuel Inj and if so how many fuel filters do you have and where did you locate them. AT THAT POINT! Thanks Ron in OREGON
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  #15  
Old 01-06-2010, 12:02 PM
Bill Phillips Bill Phillips is offline
 
Join Date: Dec 2006
Location: Forsyth, GA
Posts: 219
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Just the way I look at it if I lose my EFIS I sure don't want an AP doing anything so why worry about a backup and to do what? EFIS go out I'm hand jobbing her to the hardpac as soon as reasonable safe. Just my .02$, Bill with a MGL Odyssey and TRIO APs in a RV-8a (wiring)
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  #16  
Old 01-06-2010, 01:27 PM
rleffler's Avatar
rleffler rleffler is offline
 
Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 3,860
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Quote:
Originally Posted by Bill Phillips View Post
Just the way I look at it if I lose my EFIS I sure don't want an AP doing anything so why worry about a backup and to do what? EFIS go out I'm hand jobbing her to the hardpac as soon as reasonable safe. Just my .02$, Bill with a MGL Odyssey and TRIO APs in a RV-8a (wiring)
I think there are a few folks that may disagree. If I'm flying single pilot IFR and the EFIS dies, I want an independent AP to keep the wings level and keep on flying to buy me some thinking time. It will tremedously ease the workload if your EFIS dies.
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  #17  
Old 01-06-2010, 03:01 PM
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akschu akschu is offline
 
Join Date: May 2008
Location: Houston, Alaska
Posts: 209
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Hopefully I can fill in some blanks here for Darren.

You really need to consider what you want an autopilot for. If it's to fly vfr (cruise control) then you have three options:

1. Purchase a Trutrak head to drive the servos and install a switch that selects the nav input from the EFIS and the 296.
2. Sell the trutrak servos and buy trio servos and hook them up to the EFIS.
3. Wait for the MGL servos.

Out of those options the first one is the most expensive, but it will give you a very well proven AP with two sources of NAV that doesn't depend on your EFIS. The second two options will work, and at a reduced cost, but you now depend on your EFIS to make your AP work, so if it fails you must be able to see.

If you are installing an autopilot to fly IFR (pilot workload reduction) then you have two options:

1. Purchase a trutrak head and drive it from an arinc 429 interface that has gps steering. This can be an IFR gps or the efis or both with a switch. The MGL documentation states that it can output to a ARINC429 autopilot, but I'm not sure what features are supported. To be complete you would want it to provide GPS steering signals that it gets from a ILS or Glideslope, and perhaps a heading bug.

2. Sell the TruTrak servos and purchase the trio servos, hook them up to the EFIS, then purchase a second EFIS for fault tolerance.

The reason why your choices are more limited is because in an IFR situation the AP reliability becomes much more critical.

If it where me I would buy a digiflight II and be happy.

schu
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  #18  
Old 01-07-2010, 12:53 AM
Rainier Lamers Rainier Lamers is offline
 
Join Date: May 2007
Location: Somerset West
Posts: 945
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Quote:
Originally Posted by rv72004 View Post
Rainier , when will you have specs on your servos? Sound promising. Will you also offer stand alone autopilots?
And while I have your attention, any news of producing a transponder ?
We have a mode-s transponder design ready to roll but it has been but on ice for now due to the frightening certification issues (we need to do both EASA and FAA). We want to first get the V6 and V15 radios out plus the V20 nav radio (certification is easier with those) - once that has been done we can concentrate on fighting the red-tape for the xponder (is it not funny that the actual design is much easier than the red tape that follows ??).

Stand-alone AP:
No. We will not do that as we do not want to compete with Trio. Trio has been helpful and very supportive of us and we will repay in kind. Trio will have access to our servos as well so they will be able to offer the same flexibility in future.

We have not released specs or even pictures yet but it looks like we will offer two servos that are different only in torque specs (both maximum as well as residual torque).
The strongest servo does about 15Nm (electronically adjustable down to about 2Nm). This is a lot of force and much more than most aircraft need so we have now added a 8Nm maximum torque version as well.
The servos are capable of measuring force so they can be used for true trim (as opposed to computed trim commands from over/undershoot integration times).
Very unique is a completely contactless and wear-free, high resolution position feedback system (to less than 0.2 degrees repeatable output shaft resolution). The servo is also very fast which is a bonus for autopilots that are able to fly an aircraft in bad turbulence.
Mounting is compatible with certain other servos out there but with some additional hacks to avoid the need for brackets in some applications.
Weights and overall dimensions are also quite similar to other servos while power consumption is down when compared to other stepper motor based solutions.
The servo, as extra bonus, operates on both 12V and 24V systems and can operate down to unusualy low voltages.
For interfacing it supports both RS232 as well as CAN.
The protocols required to drive this servo will be published, as promised, so anybody, including our competitiors can use these servos to add direct autopilot functionality to their products without having to go through the pain of developing a servo.

More soon...

Rainier
CEO MGL Avionics
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