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Remote compass

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naumuk(at)windstream.net
Guest

Posted: Wed Mar 11, 2009 4:07 pm Post subject: Remote compass

All-

     FWIW-

     According to my whiskey compass,  the best place to level and avoid magnetic interference between the D-100 and  remote compass sender on my HDS is the baggage shelf. Nothing else  comes close to being acceptable unless you used non-magnetic cables.  According to Dynon, you still have to be careful because some stainless will  still cause deflection. 

     I thought things were solved re:  putting the sender in the wings until Gig reminded me of the +/-  1degree sender/receiver alignment spec. In flight wing deflection would bust  it.

     On my project I don't think I  can do any better. If the installation doesn't work out so be it-  I'll carve a hole in my panel, mount my whiskey compass and add another 3lbs.

 Bill Naumuk

Townville, Pa.

HDS 601MG/Corvair  95%

   [quote][b]

craig(at)craigandjean.com
Guest

Posted: Wed Mar 11, 2009 4:33 pm Post subject: Remote compass

Is the +/- 1 degree requirement on all three axis? You could try a real-world test: plug the sensor into the D-100, simulate the roll it would see as the wing flexed and see if it actually affected the heading display.  

   

Maybe RV’s are stiffer because I’m pretty sure I’ve seen the sensor in their wing tips. What do they say on the Dynon forums?  

   

-- Craig  

       

From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Bill Naumuk

 Sent: Wednesday, March 11, 2009 6:06 PM

 To: zenith list

 Subject: Remote compass  

  

  

     

All-  

    

    FWIW-  

    

    According to my whiskey compass, the best place to level and avoid magnetic interference between the D-100 and remote compass sender on my HDS is the baggage shelf. Nothing else comes close to being acceptable unless you used non-magnetic cables. According to Dynon, you still have to be careful because some stainless will still cause deflection.   

    

    I thought things were solved re: putting the sender in the wings until Gig reminded me of the +/- 1degree sender/receiver alignment spec. In flight wing deflection would bust it.  

    

    On my project I don't think I can do any better. If the installation doesn't work out so be it- I'll carve a hole in my panel, mount my whiskey compass and add another 3lbs.  

    

Bill Naumuk

 Townville, Pa.

 HDS 601MG/Corvair 95%  

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Wed Mar 11, 2009 6:02 pm Post subject: Remote compass

I have a $10 automotive compass from Meijer mounted with double sided  

tape to the canopy above the panel. It is marked in degrees, has  

adjustable compensators and weighs about 4 oz. It's accurate, and  

meets all the FAA requirements for a magnetic heading indicator. I  

sold the $150 aircraft compass because I couldn't get to adjust  

properly in any location that I could mount it.



On Mar 11, 2009, at 8:05 PM, Bill Naumuk wrote:



 	  Quote: 	
		       On my project I don't think I can do any better. If the  

 installation doesn't work out so be it- I'll carve a hole in my  

 panel, mount my whiskey compass and add another 3lbs.




	




-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Fri Mar 13, 2009 8:45 am Post subject: Re: Remote compass

Yes the +/- 1 degree is in all axis.



One other thing to keep in mind is that there may also be magnetic fields that are only there when the plane is powered up.



I think if you don't have the "bomb bay" access to the rear fuselage the best place might well be the rear of the baggage area. Just keep in mind that it is back there if you ever have to carry a load of magnets somewhere.

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

jaybannist(at)cs.com
Guest

Posted: Fri Mar 13, 2009 9:02 am Post subject: Remote compass

Or a "magnetic" personality in the right seat ?

 

   

 Gig Giacona wrote:

 

   	  Quote: 	
		  

Just keep in mind that it is 

back there if you ever have to carry a load of magnets somewhere.



Do not archive

	
 

      Email message sent from CompuServe - visit us today at http://www.cs.com 

  [quote][b]

Afterfxllc(at)aol.com
Guest

Posted: Fri Mar 13, 2009 11:25 am Post subject: Remote compass

Bill

  

 Your whisky compass is night and day to the remote compass. The remote  compass will cancel interference that your whisky compass can't. As I have  proven in the now 3 installs right behind the firewall. I did have to move it  slightly on this install because of the landing light flasher I installed but it  is still right behind the firewall.

  

 Jeff

  	  Quote: 	
		     All-

       FWIW-

       According to my whiskey    compass, the best place to level and avoid magnetic interference between the    D-100 and remote compass sender on my HDS is the baggage    shelf. Nothing else comes close to being acceptable unless you used    non-magnetic cables. According to Dynon, you still have to be careful because    some stainless will still cause deflection. 

       I thought things were solved    re: putting the sender in the wings until Gig reminded me of the +/-    1degree sender/receiver alignment spec. In flight wing deflection would bust    it.

       On my project I don't think I    can do any better. If the installation doesn't work out so be    it- I'll carve a hole in my panel, mount my whiskey compass and add    another 3lbs.

   Bill Naumuk

Townville, Pa.

HDS    601MG/Corvair 95%

	


 

  

 A Good Credit Score is 700 or Abo/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DfebemailfooterNO62"> See yours in just 2 easy steps!

  [quote][b]

pmaxpmax(at)HOTMAIL.COM
Guest

Posted: Fri Mar 13, 2009 12:41 pm Post subject: Remote compass

I built my plane before the "bomb-bay" door drawings came out. When I installed the remote compass for my Dynon D-180, I made myself a small access panel as far back in the plane as I could. The limiting factor was how far my arms could reach toward the front of the plane to pull the wires through and mount them securely. I used non-magnetic washers to shim the front of the remote sender so it was level with the dynon unit. It wasn't very hard. 



Phil Maxson

601XL/Corvair

Northwest New Jersey

---

craig(at)craigandjean.com
Guest

Posted: Fri Mar 13, 2009 12:49 pm Post subject: Remote compass

Do you think you got it within one degree on all three axis? That seems like

an excessively tight spec.



-- Craig



--

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Fri Mar 13, 2009 12:56 pm Post subject: Re: Remote compass

 	  craig(at)craigandjean.com wrote: 	
		  Do you think you got it within one degree on all three axis? That seems like

an excessively tight spec.



-- Craig



-- 	




I don't know about Phil but I made the spec and it wasn't even hard to do. The panel is 90 degrees to the longerons and the floor of the fuselage is 3 degrees from being parallel with the longerons.



I just made a mount that was 3 degrees the other way and poof it is level.



I did, of course check this with a digital level and I was 0.2 off but I and the Dynon can live with that.

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

naumuk(at)windstream.net
Guest

Posted: Fri Mar 13, 2009 2:17 pm Post subject: Remote compass

Jeff-

     Rather than belabor the point, the back of the baggage  shelf seems to meet Dynon installation criteria, and it's not like I have to buy  anything extra. I can use the extra room up front for my encoder installation,  anyway.

                                                                             Bill

 [quote]   ---

dredmoody(at)cox.net
Guest

Posted: Sat Mar 14, 2009 4:22 am Post subject: Remote compass

My remote magnetometer install was even simpler,  but requires the presence of the belly hatch or an improvised side skin  access panel for access. I had screwed up the side cut on the heel rest channel  early on (building from a kit) and had to get a new one from the factory.  The old one was put to use to make a tray across the upper longerons about a  foot behind the baggage deck. I mounted the unit on that tray and I can reach it  from the belly hatch. The tray is level with the longerons and is perpendicular  to the plane's long axis. The unit is square to the tray and so is well within 1  degree in both axes.

  

 Ed

   [quote][b]

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