Replies to This Discussion

Permalink Reply by Glenn M on April 11, 2012 at 10:45pm

Are you taking off from grass? I've had legs caught by the grass before and it can cause a flip.

• ▶ Reply

Permalink Reply by Michael Utz on April 11, 2012 at 11:55pm

yes i did all take off´s in the grass. i will test this afternoon some where else.

• ▶ Reply

Permalink Reply by Michael Utz on April 13, 2012 at 12:17am

i tryed this morning on the street i works much better but still trys to flip.

on the street it is much easyer to compensate the flip. for me it is now clear why the copter intents to flip in the grass. during take off my copter is sliding over the street in the grass it would not be possible.

 

but there is still a intention to flip over. will post a video and logs this afternoon.

• ▶ Reply

Permalink Reply by Michael Utz on April 11, 2012 at 10:50pm

i did the following steps:

checked again Props and Motos spin direction.

recalibrated all ESC´s

made the following setup on the ESC:

checked cabling between APM and ESC´s

 

but copter still flips during take off

 

• ▶ Reply

DeveloperPermalink Reply by Andreas M. Antonopoulos on April 11, 2012 at 11:13pm

This happened a few times for me. It was a leveling issue. This is how I solved it:

First, lay on the throttle slowly until you get a slight liftoff. If one side starts lifting first, kill throttle and got to step 2. Even 2 inches difference should not happen if it is properly leveled (at least in my experience).

Make sure copter is on completely level surface. Instead of holding right-yaw for 4 seconds (as you do to arm), hold it for 15-20 seconds. This will trigger leveling function. 

Then arm again, and apply throttle. Increase throttle very very slowly. It should lift off evenly. Again, if it lift unevenly, don't even try to fly. 

If this does not work, it might be very uneven power for a variety of reasons, including uncalibrated ESCs (see wiki), incorrect rotation or prop direction (check the airflow, see wiki), loose connection etc. 

hope this helps

• ▶ Reply

Permalink Reply by Michael Utz on April 11, 2012 at 11:58pm

i thought i have it leveled perfect. i did the leveling on a table at home which is leveled verry good. but will try this afternoon.

• ▶ Reply

Permalink Reply by Michael Utz on April 12, 2012 at 11:49pm

i followed your instruction but with no succses copter still try to flip.

• ▶ Reply

Permalink Reply by Florian G on April 13, 2012 at 8:03am

Hello Michael,

i am quite curious to see how you resolve your issue. While waiting for the props (i guess a week or two), i will build a powerful quad and hope to share your experience (or get the same problem). If i can not get arducopter to work, i have a fallback-option, however, arducopter is much nicer...

Are your motors also from RCTimer ?

Cheers

Florian

• ▶ Reply

Permalink Reply by Michael Utz on April 15, 2012 at 5:31am

no my motors are from hk 2836/11 750 kv turnegy

• ▶ Reply

Permalink Reply by jonny m on April 15, 2012 at 12:03am

Hi Glenn, 

Same problem.... my current theory is that the propellers are not all in the same plane. leveling was spot on. good luck 

• ▶ Reply

Permalink Reply by Florian G on April 15, 2012 at 3:50am

Hello Jonny !

Is not having the props in the same plane an issue ? - If i e.g. create a quad-frame with two rectangular tubes on top of each other, they will have a delta in the plane of e.g. 15mm (if 15mm tubing is used).

Is this an issue ? - I find it much more mechanically stable to have e.g. two tubes of 1m instead of cutting pieces of 4x 50cm. - Does anyone know about this ? - This could prevent me from creating the next construction error (currently starting on a quad, as i can not get my octo flying).

Cheers

Florian

• ▶ Reply

Permalink Reply by jonny m on April 15, 2012 at 10:16am

Hi Florian, 

I bet it would be okay - i probably should have wrote 'parallel' planes. if one motor was askew by a few degrees i bet that would cause some strange air frame behavior.

@ Michael... thanks for the update, i'll double check my balance. how close to perfect do you have your copter setup now?

• ▶ Reply

• ‹ Previous
• 1
• 2
• Next ›
• Page