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mmarian · 09-05-2012, 06:12 PM

Just wondering how prevalent this toilet bowl effect is with various GPS controlled multicopters and what are the possible remedies?? I have the DJI Naza M on F550 hexa and can't seem to be able to get rid of it. Maybe I have a faulty GPS sensor, maybe I need to play with gains to find the sweet spot ???? Input from experienced people regarding this issue would be greatly appreciated.

DesJardins · 09-05-2012, 06:16 PM

Have you tried turning the Compass a few degrees left/right depending on your areas magnetic declination?

Here in Phoenix it's about +11 but my compass works well straight forward.

mmarian · 09-05-2012, 06:23 PM

[QUOTE=DesJardins;4260980]Have you tried turning the Compass a few degrees left/right depending on your areas magnetic declination?

No I have not. The magnetic declination in my area is 12deg East. My hexa flies straight with the gps unit pointing straight forward. Where should I turn it to ? Right or left??? Is it different on southern hemisphere??

Tahoe Ed · 09-05-2012, 11:44 PM

I am also 12 degrees east and turn mine to the right.

mmarian · 09-06-2012, 04:31 AM

I turned the GPS unit right just a bit. Well, how do you measure exactly 12 deg, how do you find a reference point for straight forward direction on the flywheel f550 and how do you hold the GPS unit in the exact 12 deg off straight direction and mount it on the double sided tape nicely in the centre of the mounting disc, all at the same time??? I think we would have to agree here that it is a bit of a challenge

Anyway, it seems to have done the trick. More testing ahead but I might be on the right track here.....

Tahoe Ed · 09-06-2012, 09:50 PM

Here they sell protractors for the school kids. I spent less that $3 usd for what I use.

09-05-2012, 06:12 PM	#1 (permalink)
mmarian Registered Users Join Date: Aug 2007	Toilet Bowl Effect Just wondering how prevalent this toilet bowl effect is with various GPS controlled multicopters and what are the possible remedies?? I have the DJI Naza M on F550 hexa and can't seem to be able to get rid of it. Maybe I have a faulty GPS sensor, maybe I need to play with gains to find the sweet spot ???? Input from experienced people regarding this issue would be greatly appreciated.

09-05-2012, 06:16 PM	#2 (permalink)
DesJardins Registered Users Join Date: Jan 2011	Have you tried turning the Compass a few degrees left/right depending on your areas magnetic declination? Here in Phoenix it's about +11 but my compass works well straight forward. __________________ Blade 450X & Blade mCPX BL Spektrum AR7200BX ProgressiveRC's "The Neutrino Ticket"

09-05-2012, 11:44 PM	#4 (permalink)
Tahoe Ed Registered Users My HF Map location Join Date: Nov 2009	I am also 12 degrees east and turn mine to the right. __________________ AMA #844172 DJI S1000 Lightbridge Zen for 5D, S900 LB Zen for BMPCC, DJI Phantom 2 Vision +, P2Z2 with Data Link, P2Z3 with LB DJI Forum Support

09-06-2012, 09:50 PM	#6 (permalink)
Tahoe Ed Registered Users My HF Map location Join Date: Nov 2009	Here they sell protractors for the school kids. I spent less that $3 usd for what I use. __________________ AMA #844172 DJI S1000 Lightbridge Zen for 5D, S900 LB Zen for BMPCC, DJI Phantom 2 Vision +, P2Z2 with Data Link, P2Z3 with LB DJI Forum Support

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09-05-2012, 06:23 PM	#3 (permalink)
mmarian Registered Users Thread Starter Join Date: Aug 2007	[QUOTE=DesJardins;4260980]Have you tried turning the Compass a few degrees left/right depending on your areas magnetic declination? No I have not. The magnetic declination in my area is 12deg East. My hexa flies straight with the gps unit pointing straight forward. Where should I turn it to ? Right or left??? Is it different on southern hemisphere??

09-06-2012, 04:31 AM	#5 (permalink)
mmarian Registered Users Thread Starter Join Date: Aug 2007	I turned the GPS unit right just a bit. Well, how do you measure exactly 12 deg, how do you find a reference point for straight forward direction on the flywheel f550 and how do you hold the GPS unit in the exact 12 deg off straight direction and mount it on the double sided tape nicely in the centre of the mounting disc, all at the same time??? I think we would have to agree here that it is a bit of a challenge Anyway, it seems to have done the trick. More testing ahead but I might be on the right track here.....

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