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GRT AHRS and Magnetometer mounting

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toaster73(at)earthlink.ne
Guest

Posted: Sun Jun 03, 2007 6:23 pm Post subject: GRT AHRS and Magnetometer mounting

I saw in the archives Bob Condrey mounted the  magnetometer in the tailcone and the AHRS on a shelf behind the  instrument panel. I like this arrangement but have a question...Bob how did you  comply with the +/- 1/2 degree pitch alignment between the two boxes? What is  the 10's level line? Any other pictures or comments appreciated. 

  

 Also wondered if anybody thinks it possible to  mount a bent whip in the tunnel between the rear seats without bothering flight  controls. Perhaps off to one side?  I like having access to things down the  road, I really dislike these closed off for good areas.

  

 THanks

 Chris Lucas

 #40072... skipping all around the  fuselage

   [quote][b]

ScooterF15

Joined: 19 Jun 2006
Posts: 136

Posted: Mon Jun 04, 2007 2:36 am Post subject: GRT AHRS and Magnetometer mounting

I mounted my  marker beacon antenna between the rear seats. No problem with pushrod or rudder  cable interference. I mounted the bent whip antenna under the passenger seat.  You don't want the bent whip antenna too far aft as it will get closer to  the ground during takeoff rotation and landing flare / aerobraking the further  back you mount it. Pictures attached.

  

 -Jim

  

 Jim "Scooter"  McGrew

http://www.mit.edu/~jsmcgrew  



  

 In a message dated 6/3/2007 10:25:53 P.M. Eastern Daylight Time,  toaster73(at)earthlink.net writes:

  	  Quote: 	
		     Also wondered if anybody thinks it possible to    mount a bent whip in the tunnel between the rear seats without bothering    flight controls. Perhaps off to one side?  I like having access to things    down the road, I really dislike these closed off for good areas.

    

   THanks

   Chris Lucas

   #40072... skipping all around the    fuselage

	


 



  

  



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jesse(at)saintaviation.co
Guest

Posted: Mon Jun 04, 2007 4:46 am Post subject: GRT AHRS and Magnetometer mounting

I don’t think between the rear seats is a good place for an antenna.  The control rod is so low there that I think it would be too risky to have anything sticking up from the belly skin there.  One possibility for a bent whip is to put it under the baggage floor (with nutplates in the skin), just off center, and then you can either get at it through the lightening holes or you can put in an access panel.  I wouldn’t put an access panel under the rear seat floor because there has to be some structural reason that there are no lightening holes in that area.  Has anybody had any problems putting them under the front seats, one on either side?  I seem to remember someone mentioning that the gear legs can get in the way.  We haven’t tested them, but have very good reception with that arrangement.  

     

Jesse Saint  

Saint Aviation, Inc.  

jesse(at)saintaviation.com (jesse(at)saintaviation.com)  

www.saintaviation.com  

Cell: 352-427-0285  

Fax: 815-377-3694  

        

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of toaster73(at)earthlink.net

 Sent: Sunday, June 03, 2007 10:24 PM

 To: rv10-list(at)matronics.com

 Subject: GRT AHRS and Magnetometer mounting  

  

     

I saw in the archives Bob Condrey mounted the magnetometer in the tailcone and the AHRS on a shelf behind the instrument panel. I like this arrangement but have a question...Bob how did you comply with the +/- 1/2 degree pitch alignment between the two boxes? What is the 10's level line? Any other pictures or comments appreciated.   

    

   

    

Also wondered if anybody thinks it possible to mount a bent whip in the tunnel between the rear seats without bothering flight controls. Perhaps off to one side?  I like having access to things down the road, I really dislike these closed off for good areas.  

    

   

    

THanks  

    

Chris Lucas  

    

#40072... skipping all around the fuselage  

  [quote]   [b]

LloydDR(at)wernerco.com
Guest

Posted: Mon Jun 04, 2007 6:15 am Post subject: GRT AHRS and Magnetometer mounting

It does not matter where the level line is, that will be  taken care of during alignment procedures, what does matter is that both are  with in the tolerance difference. The easy way to make sure they are the same is  to take the smart level device and match the degrees it is saying for both  locations. I ordered the smart level from Amazon and got the one with the 4 foot  and 2 foot level bars, then you can swap the tool between them and use it stand  alone. It made setting travel of elevators/rudders/ ailerons very easy to  determine and makes alignment of both the Dynon and Chelton remote magnetometers  a non-issue.

 just my .02

 Dan

 N289DT RV10E



   From: owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of  toaster73(at)earthlink.net

Sent: Sunday, June 03, 2007 10:24  PM

To: rv10-list(at)matronics.com

Subject: GRT AHRS  and Magnetometer mounting

 

 I saw in the archives Bob Condrey mounted the  magnetometer in the tailcone and the AHRS on a shelf behind the  instrument panel. I like this arrangement but have a question...Bob how did you  comply with the +/- 1/2 degree pitch alignment between the two boxes? What is  the 10's level line? Any other pictures or comments appreciated. 

  

 Also wondered if anybody thinks it possible to  mount a bent whip in the tunnel between the rear seats without bothering flight  controls. Perhaps off to one side?  I like having access to things down the  road, I really dislike these closed off for good areas.

  

 THanks

 Chris Lucas

 #40072... skipping all around the  fuselage

[quote]



href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

href="http://forums.matronics.com">http://forums.matronics.com



[b]

jesse(at)saintaviation.co
Guest

Posted: Mon Jun 04, 2007 7:32 am Post subject: GRT AHRS and Magnetometer mounting

On this note, it may be good for all Dynon customers to know that the Dynon magnetometer needs to be very close to the same orientation as the unit.  Dynon says that it needs to be within a degree in all directions.  Dan, can you post a picture of your installation on this?  

   

Thanks.  

     

Jesse Saint  

Saint Aviation, Inc.  

jesse(at)saintaviation.com (jesse(at)saintaviation.com)  

www.saintaviation.com  

Cell: 352-427-0285  

Fax: 815-377-3694  

        

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Lloyd, Daniel R.

 Sent: Monday, June 04, 2007 10:15 AM

 To: rv10-list(at)matronics.com

 Subject: RE: GRT AHRS and Magnetometer mounting  

  

   

It does not matter where the level line is, that will be taken care of during alignment procedures, what does matter is that both are with in the tolerance difference. The easy way to make sure they are the same is to take the smart level device and match the degrees it is saying for both locations. I ordered the smart level from Amazon and got the one with the 4 foot and 2 foot level bars, then you can swap the tool between them and use it stand alone. It made setting travel of elevators/rudders/ ailerons very easy to determine and makes alignment of both the Dynon and Chelton remote magnetometers a non-issue.  

just my .02  

Dan  

N289DT RV10E  

       

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of toaster73(at)earthlink.net

 Sent: Sunday, June 03, 2007 10:24 PM

 To: rv10-list(at)matronics.com

 Subject: GRT AHRS and Magnetometer mounting    

I saw in the archives Bob Condrey mounted the magnetometer in the tailcone and the AHRS on a shelf behind the instrument panel. I like this arrangement but have a question...Bob how did you comply with the +/- 1/2 degree pitch alignment between the two boxes? What is the 10's level line? Any other pictures or comments appreciated.   

    

   

    

Also wondered if anybody thinks it possible to mount a bent whip in the tunnel between the rear seats without bothering flight controls. Perhaps off to one side?  I like having access to things down the road, I really dislike these closed off for good areas.  

    

   

    

THanks  

    

Chris Lucas  

    

#40072... skipping all around the fuselage  

  [quote]  href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-Listhref="http://forums.matronics.com">http://forums.matronics.com    [b]

bcondrey

Joined: 03 Apr 2006
Posts: 580

Posted: Mon Jun 04, 2007 7:50 am Post subject: Re: GRT AHRS and Magnetometer mounting

I can't take pictures right now because I'm out of town on a biz trip but can take some next weekend if you don't get your questions answered by then.  



The magnetometer is aligned to the center J channel in the tailcone and is mounted to the adjacent J channels.  I made "hangers" out of .032 and made an alum angle tray that the magnetometer is mount to.  The tray was mounted and then I used plum bobs to align the mount holes for the yaw axis.  I went as close to the top as possible to maximize distance from the AP roll servo and battery contactors (I have 2).  Pitch iand roll axis was rerenced to the longerons and using a digital level.



The AHRS is mounted on a tray that is attached to the right panel rib between the subpanel and firewall.  It uses the panel rib for yaw axis and and the upper aluminum firewall structure for roll axis.  Pitch axis was set and other axis confirmed with a digital level.



Bob

LloydDR(at)wernerco.com
Guest

Posted: Mon Jun 04, 2007 9:24 am Post subject: GRT AHRS and Magnetometer mounting

Will do, as soon as I mount the wing next week for the  final time, right now they are still in the cradle waiting for the fuse to come  back from paint. What I did was to measure the Dynon as it sits in the panel and  replicated the angel offset with the smart tool and used the remote mount unit  from Safeair to put it out on the last rib of the wing. I will post the pics  next week when I get to the airport.

 Dan

 N289DT RV10E



   From: owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse  Saint

Sent: Monday, June 04, 2007 11:32 AM

To:  rv10-list(at)matronics.com

Subject: RE: GRT AHRS and  Magnetometer mounting

 

  

On this note, it may be  good for all Dynon customers to know that the Dynon magnetometer needs to be  very close to the same orientation as the unit.  Dynon says that it needs  to be within a degree in all directions.  Dan, can you post a picture of  your installation on this? 

  

Thanks. 

   

Jesse  Saint 

Saint Aviation,  Inc. 

jesse(at)saintaviation.com (jesse(at)saintaviation.com) 

www.saintaviation.com 

Cell:  352-427-0285 

Fax:  815-377-3694

    

 

From:  owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Lloyd, Daniel R.

Sent: Monday, June 04, 2007 10:15  AM

To:  rv10-list(at)matronics.com

Subject: RE: GRT AHRS and  Magnetometer mounting

 

  

It does  not matter where the level line is, that will be taken care of during alignment  procedures, what does matter is that both are with in the tolerance difference.  The easy way to make sure they are the same is to take the smart level device  and match the degrees it is saying for both locations. I ordered the smart level  from Amazon and got the one with the 4 foot and 2 foot level bars, then you can  swap the tool between them and use it stand alone. It made setting travel of  elevators/rudders/ ailerons very easy to determine and makes alignment of both  the Dynon and Chelton remote magnetometers a  non-issue. 

just my  .02 

Dan 

N289DT  RV10E 

    

 

From:  owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of  toaster73(at)earthlink.net

Sent: Sunday, June 03, 2007 10:24  PM

To:  rv10-list(at)matronics.com

Subject: GRT AHRS and  Magnetometer mounting  

I saw in the archives Bob Condrey  mounted the magnetometer in the tailcone and the AHRS on a shelf  behind the instrument panel. I like this arrangement but have a question...Bob  how did you comply with the +/- 1/2 degree pitch alignment between the two  boxes? What is the 10's level line? Any other pictures or comments appreciated.  

  

 

  

Also wondered if anybody thinks it  possible to mount a bent whip in the tunnel between the rear seats without  bothering flight controls. Perhaps off to one side?  I like having access  to things down the road, I really dislike these closed off for good  areas.

  

 

  

THanks

  

Chris  Lucas

  

#40072... skipping all around the  fuselage

 	  Quote: 	
		    href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-Listhref="http://forums.matronics.com">http://forums.matronics.com    	
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toaster73(at)earthlink.ne
Guest

Posted: Mon Jun 04, 2007 1:42 pm Post subject: GRT AHRS and Magnetometer mounting

Thanks for the replies. I get the idea now.  Pictures are not necessary, 

Bob, unless you feel compelled to share.

Jesse, are you saying you have been mounting the bent whip under the front 

seats in your planes, with no com problems in flight, at least none detected 

thus far via normal operation etc .etc.?

Thanks

Chris

#40072



---

jesse(at)saintaviation.co
Guest

Posted: Mon Jun 04, 2007 2:24 pm Post subject: GRT AHRS and Magnetometer mounting

Yes, that is what I am saying.  Again, we haven't done the technical testing

that others have mentioned, but we are quite happy with the placement,

reception on the ground and in the air, and the aesthetics.



Do not archive



Jesse Saint

Saint Aviation, Inc.

jesse(at)saintaviation.com

www.saintaviation.com

Cell: 352-427-0285

Fax: 815-377-3694



--

toaster73(at)earthlink.ne
Guest

Posted: Tue Jun 05, 2007 5:13 pm Post subject: GRT AHRS and Magnetometer mounting

Great, Thanks

-Chris



do not archive



---

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