Welcome to Multi-Rotor UK. Please login or sign up.

Monday,December 16, 2019, 02:41:24

Login with username, password and session length


Bad Raven:
02 Dec 2019 20:03:50
Only if the battery is fully charged, leak a few volts and it'll be fine.......
02 Dec 2019 17:19:55
If yo fly a Mavic Mini and get over a gramme of mud on it, do you have to register it?  :rofl:
02 Dec 2019 08:38:56
Not a problem i've had a body mod, I think of Jean Harlow naked on a trampoline  and the new antenna  extends automatically..   :whistling:
29 Nov 2019 17:17:37
That'll play hell with your FPV signal. :rofl:
29 Nov 2019 17:10:20
Won't get me i'm wearing my tin foil hat... :wack0
29 Nov 2019 14:19:03
Because GOVERNMENT SPY DRONES are watching us! :frantic:
29 Nov 2019 11:41:22
BBC News this am ..only 50% of people have registered  for the  CAA  scheme.. If people haven't registered  how do they know it's 50%.. :shrug:
28 Nov 2019 20:16:14
Very very quiet. I am missing chatting :-( Must be the weather....
25 Nov 2019 08:28:26
Forums very quiet  :shrug:
18 Oct 2019 11:25:16
Sounds good yama. Would love to see some images. 3d models sound cool too
  • Total Posts: 197240
  • Total Topics: 19890
  • Online Today: 59
  • Online Ever: 530
  • (Tuesday,June 26, 2012, 08:34:46 )
Users Online
Users: 0
Guests: 42
Total: 42

Theme Changer


3d - Printworx

Printing 3d Forum

Location of FC - Does it matter?

Started by Beaver2206, Thursday,April 07, 2016, 21:45:25

Previous topic - Next topic



Resurrected the Tarot 250 and threw a CC3D atom on there.  Great piece to set up, though I was wondering if mounting the FC near the nose effected performance in any way.  I know with setting up DJI systems you correct the x y z location of the controller.

I am getting some oscillation in the hover and wondered if this may contribute to it at all?

Is there any way to set the FC location in the software?  I am using Openpilot and Libre Pilot.

Pids are low which has helped (in the 20';s rather than 50';s)

650 Ironman, Inspire 1, Tarot 250, DJI S900
RPQs Qualified with PFAW


It';s always better to have the gyros and accelerometers as near to the cog as possible so the fc has less to correct obviously the further away the harder the fc has to work to correct errors.
I think..........I think I am........therefore I am.............I think!


For oscillations it matters but not in a predictable way, frames flex to a greater or lesser degree and therefore oscillations effect different parts to a greater or lesser degree.

Mounting in the centre of a box frame puts you as far away from the motet probable sources of vibration (each motor and prop) as possible so this is a good idea

If you only fly rate mode, you only use a gyro, this detects changes in aspect, this is constant regardless of where you mount on a frame

If you use your acc however, for example you use angle or horizon mode, this would respond incorrectly increasingly as it moves further from the centre of rotation


I';m sure there is some maths somewhere that says it';ll suck

I';m sure somebody else will tell you it works

Try it and see! 


Your oscillations are due to too high pids. That';s a very light frame so will require lower pids than a frame of the same size but higher mass.
Round By Round Qualifying and Finals For All.

it just makes sense