RC India

greetings to all
i am making a quad vtol bellow is the experimental body and design which can transform to forward and back to hover(tested only on ground )
using kk2 board and 1450 kv 6x4.5 3 blade prop,
but i am finding problem to lift this thing i am having only sim experience of quad .
and setting in kk2 are at default and x copter mode
bellow is the video
http://www.youtube.com/watch?v=QAQxh05dhxk
motor are 19 inc apart from shaft to shaft,
any suggestions.
and sorry for the poor built it is built with in 5 hour (building planning from 4 months)

video is private ???

ill correct it with more video
 

video updated

Vinay, I hope it's not underpowered.

Also, with the KK 2.0, how do you plan to move in plane mode. Have you written custom firmware for that? I might be incorrect but since the axis will be turned almost 90 degrees in plane mode, I forsee a problem arising out of a Gimbal lock, so assuming a situation if the craft rolls to left, the left motors will spin faster, thereby inducing yaw rather than counteracting roll...

girish sir
thanks for feed back
yes it is turning to 90* with 1-2 sec delay  ill upload the video of transition also (not in air only on ground )
yet to try plane mode flying with out transition
do i have to fix the motor little bit far from this setting? to hover
i am little bit concern about hovering.
 in plane mode as you said i have to fix that by bypassing the kk2  board feedback (planing)
and finally aum is around 950 to 1200 gm and expected thrust is more then 2kg.

You probably want to get this in air first champ. I strongly feel that the craft is underpowered and is unable to lift. I am not an expert but I doubt that setup is providing about 2kg thrust. Quadmasters, please chip in!

Hold it in your hand over your head, *keep your face and fingers off and away*, give full throttle. Lighten your grip on the quad a little and see if it's wanting to fly off or unable to keep up against gravity. I cannot stress this more, but *do not let it fly off*. Tie it between opposite walls along one axis if you're intimidated by the thought of holding a quad in hand.

As for bypassing the KK for plane mode, how will you do it? KK does not have a firmware that allows for the quad-plane transition (others, correct me if I'm wrong) and it also does not allow hooking into the code per se.

the plan is like this to bypass
i take all output from kk2 to arduino and a direct throttle channel as well in normal quad mode all feed back will transfers directly through arduino  when i switch to plane mode arduino will slowly decrease the feedback from kk2 and direct response to throttle, in theory it will work i asked my friend to write code for that
and as per " craft is underpowered " i have only given 30% throttle in that video as i don't have dare to go further in my first attempt  .
but ill try your method today
motor are rated for 650 gm thrust at 7x4 as i am using 6x4.5 i may get around 550 or so .total thrust might be 2 kg or more but ill take your suggestion. 
thanks

As of now you might want to get this airborne first. Generally, so to speak, a quad lifts at about 50% throttle given the max thrust is about twice the weight.

Yes in theory it will work. The practical part will need some assumptions and tweaking as a lot of raw values are lost in calculations while deriving a servo timing (~1ms - 2ms) from the channel value, e.g. subtrims; a reverse transformation (on a different subsystem) to retrieve the channel value from the servo timing is not guaranteed to be correct and precise, and may as well be, mathematically, undefined. Lemme know if you need any help in the microcontroller programming, Your best bet might be to write a custom firmware for the KK controller without adding on an Arduino. In fact, it's too early to comment

Hope that helps
GS

Today evening it crashed while trying to hover it
I have to re build it with more tough frame
And yes your words are so true that I am experiencing it.

Sent from my MB525 using Tapatalk 2

be;;ow is the tilt mechanism in work
http://www.youtube.com/watch?v=qcYXuCNcEkk