VR Dragon 2.0 First Flight with Gimbal firmware Arducopter 32 rev 2.0.41 Heavy lift configuration




Dear Friends,

today i doing my first flight with new revision of VR Dragon.

Dragon components are :

VR Brain (Multipilot32 ).

VR Imu Full

6 x 50 Amp Motorius ESC

6 x 13 APC propeller.

6 x Turnigy Motors

Carbon Fiber Frame.

The first gimbal tested is PhotoHigher AV 200.

This kind of configuration can

I put on Dragon for the test 2 kind of camera Panasonic SD90 and Canon EOS 600D.

During my test i found some problem on rolling shutter on SD90 . The Canon EOS 600D don't have any kind of problem it is perfect camera.

The RTF Kit will be available at the end of october if you need more information contact me at : lasernav@gmail.com

 

Original post : http://www.virtualrobotix.com/profiles/blogs/vr-dragon-2-0-first-fl...

More picture for building log : http://www.virtualrobotix.com/photo

Views: 1109

Comment by eduardo on September 13, 2011 at 6:58am

how may time you can fly with this solution ?


Moderator
Comment by Roberto Navoni on September 13, 2011 at 7:12am

Hi Edoardo ,

this summer i doing some test on heavy lift platform. I developed a coaxial hexa VR Dragon 1.0 where i doing the test with 3.5 kg of payload. And then this VR Dragon 2.0 that is a Hexa Radial configuation. This one is more stable of last one. So after the first test of flight i decide to put on it AV 200 PhotoHigher Gimbal and then my Canon 600 D with 10-55 lens.

That is the first result without any kind of software post processing . So i tested also the Panasonic SD90 but i saw that it have a bad Sensor because continue to have rolling shutter problem .  I would add more payload on gimbal to understand if the RS problem could be solved also on that camera ... But Canon is very good solution.

It's a last step berfore Canon 5D or 7D. But the cmos of 600D is the same of 7D no difference for video . The advantages is only that there is less grams .

Best

Roberto

Comment by Jose Angel on September 13, 2011 at 7:40am

Roberto, could you please elaborate more about the different flight behaviour between Y6 and radial hexa?

I supposed that radial hexa was more stable but, how much? is the difference really noticeable?

What about the wind?

Is the Y6 less affected by the wind in your experience?

Thanks!

Comment by Jeff E on September 13, 2011 at 7:52am

I too am quite interested why the Y6 is less stable and difference in flight times. Is the stability that bad for the Y6?


Moderator
Comment by Roberto Navoni on September 13, 2011 at 8:12am

@Jeff @Jose,

so in my experience the Y6 configuration is good and stable if the frame is small not so big. The main problem that i found are :

The motor in coaxial configuration produce a lot of vibration respect of radial. because you have on same tail 2 motors.

The other problem is that you need to found two propeller with different dimension for obtain same quantity of propulsion. If you don't have same quantity of propulsion , Yaw correction introduce component on pitch and roll , too . So if you want to rotate with your hexa youh have also strange effect on controll.

Normally a Y6 configuration is less efficient of radial you can have 15 - 20 % less propusion respect of standard hexa radial.

So all of this limit on this kind of configuration is not so simple to setup , is possible to obtain a good configuration , but is not simple . The main problem is to found correct propeller .

In my revision of code i introduce the mixertable so is more simple to setup an coaxial configuration , but if you use a standard arducopter configuration is not so simple to implement a good heavy lift coaxial configuration.

The video is the my first flight ... i change only the yaw pid from 7 to 3 ... and put the pitch and roll on 2.8 2.8 , stop no other change. In the coaxial conf for have a good flyable version of hexa i doing 3 days of pid :(

This is the reason because i prefer radial.

The advantages of Hexa Y6 is that you can fly also without 2 propellers and is better for acro fly. But for automatically and for fly cam application i think that is better radial.

 

Comment by Jeff E on September 13, 2011 at 8:24am

quite interesting I have a small one I guess when I got the money to buy motors for it I might try it out. I havent jump into MP32 but looking forward to your progress. Thanks

Comment by Helldesk on September 13, 2011 at 8:48am

Have you experimented with different speeds for the top and bottom motors, allowing you to use same size props on them?


Moderator
Comment by Roberto Navoni on September 13, 2011 at 9:21am

Yes Ture , with Mixertable on Arducopter32 is possible to set for every motor the quantity of gas i develop it expecially for Coax Configuration .

I don't know if you remember this video ... but it don't fly so bad. Fly well but i need 3 day  for setup and is not so stable as hexa radial. I think that is more simple to use radial configuration for automatic feature as rtl or loiter.

 

 

http://www.virtualrobotix.com/profiles/blogs/vr-dragon-hexa-coax-he...

Comment by Jose Angel on September 13, 2011 at 9:45am

Roberto, thanks for sharing your experience, it is really useful for the community :)


What motor layout were you using in your Y6?

the older 3 upper CCW

or the newer 2 upper-front CW and the upper-back CCW?

 

A friend of mine has a tiny Y6 (40cm motor2motor) based on the old layout with default PIDs, and it is really agile and funny to fly. I didn't notice the strange behaviour you said, but maybe it is too small.

Another friend has recently build a heavy lift Y6 (rccarbon 65cm motor2motor) with MK3538 (same as pulso 2814/22) and the new layout. He has done only two easy hover flights to check systems, so I will ask him about his feelings on stability.

Thanks!

Comment by Wiktor on September 13, 2011 at 10:26am

wow amazing! I wish I could afford all the great gear you have

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