Quad always fly's backwards ?? first problem i see..
« on: March 29, 2016, 09:58:04 pm »

So short description of problem..

"Quad always fly's backward .."

So I'm stumped...  I've build more quads that I can think.. and never have I had this problem..

1. I've swapped board..
2. I've swapped Rx.. Tx..

tested with different profiles.  its seem in attitude mode
the quad want to fly backward all the time.. the more time in the air more forward pitch I have to give it.

the only thing I have not replace is motors and esc's but I've replaced all components to see if the
CC3D was bad.. or Rx.. or Tx.. and it does it all the time.

Anyone run into this.. ??

f5soh

  • *****
  • 4572
    • LibrePilot
Re: Quad always fly's backwards ?? first problem i see..
« Reply #1 on: March 29, 2016, 10:17:47 pm »
The quad do not maintain level ?

Try rate first if the issue still, and if rate ok:
- remove vibrations
- add adhesive foam for board mount
- Go to Attitude tab > add some filtering

jbarchuk

  • ***
  • 129
Re: Quad always fly's backwards ?? first problem i see..
« Reply #2 on: March 29, 2016, 10:31:22 pm »
"Quad always fly's backward .."
Anyone run into this.. ??

Yes, but the opposite. Do what f5 says (always do what f5 says :) ) but also consider this: check CG. My quad was fine until I added a gopro to the nose about 3" in front of the CG. As expected, that caused it to pitch forward and I needed to haul back on the elevator to maintain level. I moved the battery back about 3" and it flies level as a duck.

Re: Quad always fly's backwards ?? first problem i see..
« Reply #3 on: March 30, 2016, 12:41:02 am »
hmm well I don't have any space to add any vibration dampening to the board..

1. in rate mode it fly fine .. stay's in place

2.  in Attitude tab already have  .1  under filtering max is .2

3.  played with that value but did not help..

4. but I'm thinking if it was vibration .. it would have problems in other axis..

it fly's perfectly\level  backwards

I have to apply about 20-30% forward control to keep it from coming back..

between this and the last good flight.. I had no crash.. and all components seem smooth.. no vibrations..

hmm..





The quad do not maintain level ?

Try rate first if the issue still, and if rate ok:
- remove vibrations
- add adhesive foam for board mount
- Go to Attitude tab > add some filtering

Re: Quad always fly's backwards ?? first problem i see..
« Reply #4 on: March 30, 2016, 01:01:48 am »

Well, not sure if this helps.   but I made the back the front.. 

motor 3 = is now 1
Motor 4 = is now 2
motor 1 = is now 3
motor 2 = is now  4

Basically fly's backwards..

rotated board of course..

Before it flew strait back.. ( now it fly's strait forward.. )

if its some crazy vibration pattern.. it would stand that If I physically swap say motors (  1 and 3 )
I should get some different results..  hmm..