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Autopilot servo instalation

 
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wdaniell.longport(at)gmai
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PostPosted: Sat Apr 11, 2015 8:45 am    Post subject: Autopilot servo instalation Reply with quote

I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.
For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....
 Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.
Many thanks
Will


William Daniell

LONGPORT
+57 310 295 0744


[quote][b]


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alainchabert(at)wanadoo.f
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PostPosted: Sat Apr 11, 2015 9:08 am    Post subject: Autopilot servo instalation Reply with quote

Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT



Le 11/04/2015 18:44, William Daniell a écrit :

Quote:
I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.


For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....


 Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.


Many thanks


Will




William Daniell

LONGPORT
+57 310 295 0744




Quote:



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wdaniell.longport(at)gmai
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PostPosted: Sun Apr 12, 2015 6:03 am    Post subject: Autopilot servo instalation Reply with quote

Alain
thank you.  Very nice.
How do did you install the plate on the tail control mechanism...must have been rather difficult.  
I am 1.95 and I dont see myself getting into the back of the aircraft to install the plate!
I was thinking of a similar place for the servo but with a bracket on the torque tube instead of the plate and control long rod you used.  However I wonder about the integrity of the torque tube as it seems a little thin.
I think that I will have a look at the feasibility of installing something like your system.
many thanks
Will

William Daniell

LONGPORT
+57 310 295 0744


On Sat, Apr 11, 2015 at 12:05 PM, Alain Chabert <alainchabert(at)wanadoo.fr (alainchabert(at)wanadoo.fr)> wrote:
[quote] Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT



Le 11/04/2015 18:44, William Daniell a écrit :

Quote:
I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.


For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....


 Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.


Many thanks


Will




William Daniell

LONGPORT
+57 310 295 0744




Quote:



[b]


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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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budyerly(at)msn.com
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PostPosted: Sun Apr 12, 2015 6:03 pm    Post subject: Autopilot servo instalation Reply with quote

Alan,
Nice clean job.
I prefer not to run a thin wall one inch tube that far without an idler in the center. However, the pitch system only needs a couple of pounds of pressure when out of trim, and when the stab is trimmed neutral, very little pressure is necessary to move the stab. We design our systems for the worse case scenario, that is, full trim up the the max torque of the trim motor and the bending moment of the thin wall tubing has to be capable of taking the load plus a rather large safety factor (since it is a control system) without bending or flexing. If the trim tube should bend, it can jamb the flight control.

I prefer to put the trim motor where you did, but make a 3/2 ratio arm to drive the tube via a tube clamp.

However, to keep a short drive tube, I would recommend installing the new light weight servos behind the mass balance post using a two inch extension from the torque tube arm (there are two holes there anyway to mount .016 steel arms to). Use a 1/2 inch with .049 wall for the drive tube (like the aileron tubes). The length of the tube should be about 2 feet.

Regards,
Bud Yerly

From: Alain Chabert (alainchabert(at)wanadoo.fr)
Sent: Saturday, April 11, 2015 1:05 PM
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Subject: Re: Autopilot servo instalation


Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT

Le 11/04/2015 18:44, William Daniell a écrit :

[quote] I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.

For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket. I assume that the service is mounted on a fiberglass bracket mounted on the floor ....

Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.

Many thanks

Will


William Daniell

LONGPORT
+57 310 295 0744


Quote:

[b]


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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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wdaniell.longport(at)gmai
Guest





PostPosted: Sun Apr 12, 2015 6:14 pm    Post subject: Autopilot servo instalation Reply with quote

Bud
Does this mean that you put a clamp on the main torque tube?
Will

William Daniell

LONGPORT
+57 310 295 0744


On Sun, Apr 12, 2015 at 9:02 PM, Bud Yerly <budyerly(at)msn.com (budyerly(at)msn.com)> wrote:
[quote] Alan,
Nice clean job. 
I prefer not to run a thin wall one inch tube that far without an idler in the center.  However, the pitch system only needs a couple of pounds of pressure when out of trim, and when the stab is trimmed neutral, very little pressure is necessary to move the stab.  We design our systems for the worse case scenario, that is, full trim up the the max torque of the trim motor and the bending moment of the thin wall tubing has to be capable of taking the load plus a rather large safety factor (since it is a control system) without bending or flexing.  If the trim tube should bend, it can jamb the flight control.
 
I prefer to put the trim motor where you did, but make a 3/2 ratio arm to drive the tube via a tube clamp. 
 
However, to keep a short drive tube, I would recommend installing the new light weight servos behind the mass balance post using a two inch extension from the torque tube arm (there are two holes there anyway to mount .016 steel arms to).  Use a 1/2 inch with .049 wall for the drive tube (like the aileron tubes).  The length of the tube should be about 2 feet. 
 
Regards,
Bud Yerly
 
From: Alain Chabert (alainchabert(at)wanadoo.fr)
Sent: Saturday, April 11, 2015 1:05 PM
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Subject: Re: Autopilot servo instalation
 

Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT



Le 11/04/2015 18:44, William Daniell a écrit :

Quote:
I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.
 
For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....
 
Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.
 
Many thanks
 
Will
 
 
William Daniell

LONGPORT
+57 310 295 0744


Quote:



arget="_blank">http://www.matronics.com/Navigator?Europa-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution


[b]


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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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budyerly(at)msn.com
Guest





PostPosted: Mon Apr 13, 2015 11:40 am    Post subject: Autopilot servo instalation Reply with quote

Yep.  Bob Berube first showed me and it is simple.  I use 2 in tube cut in half with a drove lug or post welded on for MW-4 attached.  Put 3/32 silicone cowl seal in the tube and clamp it on.  I prefer this if there is no access in the aft end.


Bud


Sent from my Verizon Wireless 4G LTE DROID

On Apr 12, 2015 10:18 PM, William Daniell <wdaniell.longport(at)gmail.com> wrote:
Bud
Does this mean that you put a clamp on the main torque tube?
Will



William Daniell

LONGPORT
+57 310 295 0744




On Sun, Apr 12, 2015 at 9:02 PM, Bud Yerly <budyerly(at)msn.com (budyerly(at)msn.com)> wrote:
[quote] Alan,
Nice clean job. 
I prefer not to run a thin wall one inch tube that far without an idler in the center.  However, the pitch system only needs a couple of pounds of pressure when out of trim, and when the stab is trimmed neutral, very little pressure is necessary to move the stab.  We design our systems for the worse case scenario, that is, full trim up the the max torque of the trim motor and the bending moment of the thin wall tubing has to be capable of taking the load plus a rather large safety factor (since it is a control system) without bending or flexing.  If the trim tube should bend, it can jamb the flight control.
 
I prefer to put the trim motor where you did, but make a 3/2 ratio arm to drive the tube via a tube clamp. 
 
However, to keep a short drive tube, I would recommend installing the new light weight servos behind the mass balance post using a two inch extension from the torque tube arm (there are two holes there anyway to mount .016 steel arms to).  Use a 1/2 inch with .049 wall for the drive tube (like the aileron tubes).  The length of the tube should be about 2 feet. 
 
Regards,
Bud Yerly
 
From: Alain Chabert (alainchabert(at)wanadoo.fr)
Sent: Saturday, April 11, 2015 1:05 PM
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Subject: Re: Autopilot servo instalation


 

Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT



Le 11/04/2015 18:44, William Daniell a écrit :

Quote:
I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.
 
For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....
 
Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.
 
Many thanks
 
Will
 
 
William Daniell

LONGPORT
+57 310 295 0744




Quote:



arget="_blank">http://www.matronics.com/Navigator?Europa-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution




Quote:
http://www.matronics.com/Navigator?Europa-List
onics.com

ww.matronics.com/contribution

[b]


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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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nigel_graham(at)m-tecque.
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PostPosted: Mon Apr 13, 2015 11:13 pm    Post subject: Autopilot servo instalation Reply with quote

Bud, Will, I have attached a couple of drawings and a picture of the UK mod application for the scheme that Bud described FYI

Nigel



On 13/04/2015 20:39, Bud Yerly wrote:

Quote:
Yep.  Bob Berube first showed me and it is simple.  I use 2 in tube cut in half with a drove lug or post welded on for MW-4 attached.  Put 3/32 silicone cowl seal in the tube and clamp it on.  I prefer this if there is no access in the aft end.


Bud


Sent from my Verizon Wireless 4G LTE DROID

On Apr 12, 2015 10:18 PM, William Daniell <wdaniell.longport(at)gmail.com> (wdaniell.longport(at)gmail.com) wrote:
Bud
Does this mean that you put a clamp on the main torque tube?
Will



William Daniell

LONGPORT
+57 310 295 0744




On Sun, Apr 12, 2015 at 9:02 PM, Bud Yerly <budyerly(at)msn.com (budyerly(at)msn.com)> wrote:
Quote:
Alan,
Nice clean job. 
I prefer not to run a thin wall one inch tube that far without an idler in the center.  However, the pitch system only needs a couple of pounds of pressure when out of trim, and when the stab is trimmed neutral, very little pressure is necessary to move the stab.  We design our systems for the worse case scenario, that is, full trim up the the max torque of the trim motor and the bending moment of the thin wall tubing has to be capable of taking the load plus a rather large safety factor (since it is a control system) without bending or flexing.  If the trim tube should bend, it can jamb the flight control.
 
I prefer to put the trim motor where you did, but make a 3/2 ratio arm to drive the tube via a tube clamp. 
 
However, to keep a short drive tube, I would recommend installing the new light weight servos behind the mass balance post using a two inch extension from the torque tube arm (there are two holes there anyway to mount .016 steel arms to).  Use a 1/2 inch with .049 wall for the drive tube (like the aileron tubes).  The length of the tube should be about 2 feet. 
 
Regards,
Bud Yerly
 
From: Alain Chabert (alainchabert(at)wanadoo.fr)
Sent: Saturday, April 11, 2015 1:05 PM
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Subject: Re: Europa-List: Autopilot servo instalation


 

Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT



Le 11/04/2015 18:44, William Daniell a écrit :

Quote:
I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.
 
For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....
 
Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.
 
Many thanks
 
Will
 
 
William Daniell

LONGPORT
+57 310 295 0744




Quote:



arget="_blank">http://www.matronics.com/Navigator?Europa-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution




Quote:
http://www.matronics.com/Navigator?Europa-List
onics.com

ww.matronics.com/contribution




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wdaniell.longport(at)gmai
Guest





PostPosted: Tue Apr 14, 2015 4:07 am    Post subject: Autopilot servo instalation Reply with quote

Nigel
perfect thanks.  
Thank makes life a lot easier that than changing the cross ways control tube.
Do you see any reason why the bracket would have to be steel...for example could it be composite provided that it was sufficiently strong/well made?
Is there a similar option for the aileron servo - ie one that doesn't require the bracket on the torque tube?  Perhaps attached to the base of the joystick.
Thanks again
Will

William Daniell

LONGPORT
+57 310 295 0744


On Tue, Apr 14, 2015 at 2:11 AM, nigel_graham(at)m-tecque.co.uk (nigel_graham(at)m-tecque.co.uk) <nigel_graham(at)m-tecque.co.uk (nigel_graham(at)m-tecque.co.uk)> wrote:
[quote] Bud, Will, I have attached a couple of drawings and a picture of the UK mod application for the scheme that Bud described FYI

Nigel



On 13/04/2015 20:39, Bud Yerly wrote:

Quote:
Yep.  Bob Berube first showed me and it is simple.  I use 2 in tube cut in half with a drove lug or post welded on for MW-4 attached.  Put 3/32 silicone cowl seal in the tube and clamp it on.  I prefer this if there is no access in the aft end.


Bud


Sent from my Verizon Wireless 4G LTE DROID

On Apr 12, 2015 10:18 PM, William Daniell <wdaniell.longport(at)gmail.com> (wdaniell.longport(at)gmail.com) wrote:
Bud
Does this mean that you put a clamp on the main torque tube?
Will



William Daniell

LONGPORT
+57 310 295 0744




On Sun, Apr 12, 2015 at 9:02 PM, Bud Yerly <budyerly(at)msn.com (budyerly(at)msn.com)> wrote:
Quote:
Alan,
Nice clean job. 
I prefer not to run a thin wall one inch tube that far without an idler in the center.  However, the pitch system only needs a couple of pounds of pressure when out of trim, and when the stab is trimmed neutral, very little pressure is necessary to move the stab.  We design our systems for the worse case scenario, that is, full trim up the the max torque of the trim motor and the bending moment of the thin wall tubing has to be capable of taking the load plus a rather large safety factor (since it is a control system) without bending or flexing.  If the trim tube should bend, it can jamb the flight control.
 
I prefer to put the trim motor where you did, but make a 3/2 ratio arm to drive the tube via a tube clamp. 
 
However, to keep a short drive tube, I would recommend installing the new light weight servos behind the mass balance post using a two inch extension from the torque tube arm (there are two holes there anyway to mount .016 steel arms to).  Use a 1/2 inch with .049 wall for the drive tube (like the aileron tubes).  The length of the tube should be about 2 feet. 
 
Regards,
Bud Yerly
 
From: Alain Chabert (alainchabert(at)wanadoo.fr)
Sent: Saturday, April 11, 2015 1:05 PM
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Subject: Re: Europa-List: Autopilot servo instalation


 

Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT



Le 11/04/2015 18:44, William Daniell a écrit :

Quote:
I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.
 
For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....
 
Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.
 
Many thanks
 
Will
 
 
William Daniell

LONGPORT
+57 310 295 0744




Quote:



arget="_blank">http://www.matronics.com/Navigator?Europa-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution




Quote:
http://www.matronics.com/Navigator?Europa-List
onics.com

ww.matronics.com/contribution




[b]


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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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nigel_graham(at)m-tecque.
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PostPosted: Tue Apr 14, 2015 5:58 am    Post subject: Autopilot servo instalation Reply with quote

I can see no reason why a composite bracket could not work provided it was well made. I would suggest two "question mark" (?) shaped mouldings back to back to ensure that the laminates are continuous (i.e. don't bond a flat piece onto a curved piece). My first choice though, would be tig welded steel.

With regards to aileron servo, I did fabricate a 2024 alloy bracket which was bonded and countersunk-screwed into the flat back-face of the P1 control yoke (prior to assembly of the control system) and driven by the sevo sitting under the seat via short pushrod in front of the seat.

If you have already constructed the under-seat controls, then your options are limited.

Nigel


On 14/04/2015 13:06, William Daniell wrote:

[quote] Nigel
perfect thanks.  
Thank makes life a lot easier that than changing the cross ways control tube.
Do you see any reason why the bracket would have to be steel...for example could it be composite provided that it was sufficiently strong/well made?


Is there a similar option for the aileron servo - ie one that doesn't require the bracket on the torque tube?  Perhaps attached to the base of the joystick.
Thanks again
Will

William Daniell

LONGPORT
+57 310 295 0744




On Tue, Apr 14, 2015 at 2:11 AM, nigel_graham(at)m-tecque.co.uk (nigel_graham(at)m-tecque.co.uk) <nigel_graham(at)m-tecque.co.uk (nigel_graham(at)m-tecque.co.uk)> wrote:
Quote:
Bud, Will, I have attached a couple of drawings and a picture of the UK mod application for the scheme that Bud described FYI

Nigel



On 13/04/2015 20:39, Bud Yerly wrote:

Quote:
Yep.  Bob Berube first showed me and it is simple.  I use 2 in tube cut in half with a drove lug or post welded on for MW-4 attached.  Put 3/32 silicone cowl seal in the tube and clamp it on.  I prefer this if there is no access in the aft end.


Bud


Sent from my Verizon Wireless 4G LTE DROID

On Apr 12, 2015 10:18 PM, William Daniell <wdaniell.longport(at)gmail.com> (wdaniell.longport(at)gmail.com) wrote:
Bud
Does this mean that you put a clamp on the main torque tube?
Will



William Daniell

LONGPORT
+57 310 295 0744




On Sun, Apr 12, 2015 at 9:02 PM, Bud Yerly <budyerly(at)msn.com (budyerly(at)msn.com)> wrote:
Quote:
Alan,
Nice clean job. 
I prefer not to run a thin wall one inch tube that far without an idler in the center.  However, the pitch system only needs a couple of pounds of pressure when out of trim, and when the stab is trimmed neutral, very little pressure is necessary to move the stab.  We design our systems for the worse case scenario, that is, full trim up the the max torque of the trim motor and the bending moment of the thin wall tubing has to be capable of taking the load plus a rather large safety factor (since it is a control system) without bending or flexing.  If the trim tube should bend, it can jamb the flight control.
 
I prefer to put the trim motor where you did, but make a 3/2 ratio arm to drive the tube via a tube clamp. 
 
However, to keep a short drive tube, I would recommend installing the new light weight servos behind the mass balance post using a two inch extension from the torque tube arm (there are two holes there anyway to mount .016 steel arms to).  Use a 1/2 inch with .049 wall for the drive tube (like the aileron tubes).  The length of the tube should be about 2 feet. 
 
Regards,
Bud Yerly
 
From: Alain Chabert (alainchabert(at)wanadoo.fr)
Sent: Saturday, April 11, 2015 1:05 PM
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Subject: Re: Autopilot servo instalation


 

Hello,
Look at the solution I adopted from 330 hours and is much simpler than the proposed mod.
Regards

Alain CHABERT



Le 11/04/2015 18:44, William Daniell a écrit :

Quote:
I have seen searching through the list that there are some alternatives to the major surgery required for Mod 75 and 76.
 
For example I saw some correspondence between Raimo and Bob Gowing connecting servo to the tail plane torque tube using a bracket.  I assume that the service is mounted on a fiberglass bracket mounted on the floor ....
 
Could I prevail on anyone who has who has an alternative to the official mods and which does not require major surgery send me a pic please.
 
Many thanks
 
Will
 
 
William Daniell

LONGPORT
+57 310 295 0744




Quote:



arget="_blank">http://www.matronics.com/Navigator?Europa-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution




Quote:
http://www.matronics.com/Navigator?Europa-List
onics.com

ww.matronics.com/contribution





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