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houlihan(at)blueyonder.co
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 Posted: Thu Jun 12, 2014 2:22 am Post subject: multiple trim switches solution is not always a relay deck! |
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Hi Richard.
I have a Matronics governor fitted in my Europa , its been flying for 12 years now, The governor was fitted prior to first flight and I provided the documentation to the then PFA to support the fitting of this unit. Frances Donaldson then approved its fitting subject to a report from the pilot who carried out the test schedule stating that the position of the trim switch did not cause problems, I recall Frances asking why I wanted to fit this device and my answer that  A, I wanted speed control and B, I wished to mount the second switch so that it was fore and aft so that pushing forward caused nose down etc , must have been acceptable and it was then formally permitted.
I wonder what has changed in the meantime, though in general I agree that simple is usually best and if if something is not fitted it will not fail in the future so if you don't need it don't fit it and that is usually also the lighter option..
regards
Tim
G-BZTH
On 12 June 2014 10:44, Sky Mail <richard.churchill-coleman(at)sky.com (richard.churchill-coleman(at)sky.com)> wrote:
[quote]--> Europa-List message posted by: Sky Mail <richard.churchill-coleman(at)sky.com (richard.churchill-coleman(at)sky.com)>
Rowland
I recently investigated using a Vertical Power system as the relay and speed controller for my elevator trim servo with stick top switches, with some advice from Tony Kay. Â In brief, Tony spoke to Andy Draper who confirmed that, due to the critical nature of the trim on an all-moving tailplane such as the Europa, the LAA wouldn't sanction any electronic controller/device in the trim circuit between the trim switch and the servo, in case of failure. Â I believe the RAC relay deck is ok because it switches the power but doesn't try to electronically control it.
On that basis, would this unit be permitted - I'm not sure where it goes in the circuit?
Richard CC
> Its primary function is to allow for the trim servo speed to be adjusted - I understand some folk have found the natural speed of the servo too high for their liking - but as bonus you can add as many extra trim switches as you want. (eg one on the panel and one on each stick-top.) I have fitted one to my trim circuit and in my tests so far (not yet flying) I find it is entirely satisfactory. In the picture of my panel (I posted a link to it yesterday) the small hole at bottom left adjacent to the trim switch is for screwdriver adjustment of the trim speed.
>
> in friendship
>
> Rowland
>
> | Rowland Carson
===========
st" target="_blank">http://www.matronics.com/Navigator?Europa-List
===========
MS -
k">http://forums.matronics.com
===========
e -
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t="_blank">http://www.matronics.com/contribution
===========
[b]
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churchy
Joined: 04 Nov 2011
Posts: 48
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| Posted: Thu Jun 12, 2014 2:56 am Post subject: multiple trim switches solution is not always a relay deck! |
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Tim
Thanks for that info - it may of course be the case that LAA/PFA have a logic for accepting the Matronics unit (grandfather rights or long fault free operational history) or that it doesn't present the same risk as the VP unit for technical reasons.
I'd like to raise the query with Andy but I'm slightly concerned that instead of getting approval for my VP unit, I get approval revoked for Matronics units? I'll talk to Tony Kay and ponder.....
Richard
Sent from my iPad
On 12 Jun 2014, at 11:22, houlihan <houlihan(at)blueyonder.co.uk (houlihan(at)blueyonder.co.uk)> wrote:
[quote]Hi Richard.
I have a Matronics governor fitted in my Europa , its been flying for 12 years now, The governor was fitted prior to first flight and I provided the documentation to the then PFA to support the fitting of this unit. Frances Donaldson then approved its fitting subject to a report from the pilot who carried out the test schedule stating that the position of the trim switch did not cause problems, I recall Frances asking why I wanted to fit this device and my answer that A, I wanted speed control and B, I wished to mount the second switch so that it was fore and aft so that pushing forward caused nose down etc , must have been acceptable and it was then formally permitted.
I wonder what has changed in the meantime, though in general I agree that simple is usually best and if if something is not fitted it will not fail in the future so if you don't need it don't fit it and that is usually also the lighter option..
regards
Tim
G-BZTH
On 12 June 2014 10:44, Sky Mail <richard.churchill-coleman(at)sky.com (richard.churchill-coleman(at)sky.com)> wrote:
| Quote: | --> Europa-List message posted by: Sky Mail <richard.churchill-coleman(at)sky.com (richard.churchill-coleman(at)sky.com)>
Rowland
I recently investigated using a Vertical Power system as the relay and speed controller for my elevator trim servo with stick top switches, with some advice from Tony Kay. In brief, Tony spoke to Andy Draper who confirmed that, due to the critical nature of the trim on an all-moving tailplane such as the Europa, the LAA wouldn't sanction any electronic controller/device in the trim circuit between the trim switch and the servo, in case of failure. I believe the RAC relay deck is ok because it switches the power but doesn't try to electronically control it.
On that basis, would this unit be permitted - I'm not sure where it goes in the circuit?
Richard CC
> Its primary function is to allow for the trim servo speed to be adjusted - I understand some folk have found the natural speed of the servo too high for their liking - but as bonus you can add as many extra trim switches as you want. (eg one on the panel and one on each stick-top.) I have fitted one to my trim circuit and in my tests so far (not yet flying) I find it is entirely satisfactory. In the picture of my panel (I posted a link to it yesterday) the small hole at bottom left adjacent to the trim switch is for screwdriver adjustment of the trim speed.
>
> in friendship
>
> Rowland
>
> | Rowland Carson
===========
st" target="_blank">http://www.matronics.com/Navigator?Europa-List
===========
MS -
k">http://forums.matronics.com
===========
e -
-Matt Dralle, List Admin.
t="_blank">http://www.matronics.com/contribution
===========
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
a-List"">http://www.matronics.com/Navigator?Europa-List
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
//forums.matronics.com
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
ot;">http://www.matronics.com/contribution
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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tonyrenshaw268(at)gmail.c
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| Posted: Thu Jun 12, 2014 2:44 pm Post subject: multiple trim switches solution is not always a relay deck! |
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Hi Tim. I too have a Matronics controller, and was thinking of having it in "fast" mode, with a conventional mode being bypassed with a switch. I've been told that you really want it a tad faster in the pattern, so this would require activating the controller on pattern entry with a default being if it failed, you would have the normal trim rate. Do you see a problem with this idea as a flier?
Regards
Tony Renshaw
Sent from my iPad
On 12 Jun 2014, at 7:22 pm, houlihan <houlihan(at)blueyonder.co.uk (houlihan(at)blueyonder.co.uk)> wrote:
[quote]Hi Richard.
I have a Matronics governor fitted in my Europa , its been flying for 12 years now, The governor was fitted prior to first flight and I provided the documentation to the then PFA to support the fitting of this unit. Frances Donaldson then approved its fitting subject to a report from the pilot who carried out the test schedule stating that the position of the trim switch did not cause problems, I recall Frances asking why I wanted to fit this device and my answer that A, I wanted speed control and B, I wished to mount the second switch so that it was fore and aft so that pushing forward caused nose down etc , must have been acceptable and it was then formally permitted.
I wonder what has changed in the meantime, though in general I agree that simple is usually best and if if something is not fitted it will not fail in the future so if you don't need it don't fit it and that is usually also the lighter option..
regards
Tim
G-BZTH
On 12 June 2014 10:44, Sky Mail <richard.churchill-coleman(at)sky.com (richard.churchill-coleman(at)sky.com)> wrote:
| Quote: | --> Europa-List message posted by: Sky Mail <richard.churchill-coleman(at)sky.com (richard.churchill-coleman(at)sky.com)>
Rowland
I recently investigated using a Vertical Power system as the relay and speed controller for my elevator trim servo with stick top switches, with some advice from Tony Kay. In brief, Tony spoke to Andy Draper who confirmed that, due to the critical nature of the trim on an all-moving tailplane such as the Europa, the LAA wouldn't sanction any electronic controller/device in the trim circuit between the trim switch and the servo, in case of failure. I believe the RAC relay deck is ok because it switches the power but doesn't try to electronically control it.
On that basis, would this unit be permitted - I'm not sure where it goes in the circuit?
Richard CC
> Its primary function is to allow for the trim servo speed to be adjusted - I understand some folk have found the natural speed of the servo too high for their liking - but as bonus you can add as many extra trim switches as you want. (eg one on the panel and one on each stick-top.) I have fitted one to my trim circuit and in my tests so far (not yet flying) I find it is entirely satisfactory. In the picture of my panel (I posted a link to it yesterday) the small hole at bottom left adjacent to the trim switch is for screwdriver adjustment of the trim speed.
>
> in friendship
>
> Rowland
>
> | Rowland Carson
===========
st" target="_blank">http://www.matronics.com/Navigator?Europa-List
===========
MS -
k">http://forums.matronics.com
===========
e -
-Matt Dralle, List Admin.
t="_blank">http://www.matronics.com/contribution
===========
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
a-List"">http://www.matronics.com/Navigator?Europa-List
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
//forums.matronics.com
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
ot;">http://www.matronics.com/contribution
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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[b]
| | - 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:
http://www.matronics.com/Navigator?Europa-List |
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