I am currently using my own design ‘H’ frame quad with great success. It has the fore and aft arms mounted on silicone o rings and has very low levels of vibration, both on APM and direct mounted camera. The low kv motors and large props give good flight times. It will probably be OK with a larger DSLR camera but think its time for a bigger machine anyway. My ESCs are rated at 30A but still feel hot when the entire (4 motors MT4008) are only pulling 20A.
So....
I would like to scale up my machine and go for the ‘H4’ frame again, firstly to use the same vibration isolation system and also because the H frame allows good separation between components like power lines and magnetometer and various antenna. Also the camera can be out front and clear of the frame.
However......
It would be nice to survive a motor/prop/ESC failure without a total frame loss.
Will a hexa on APM achieve this or does it need to me 8 more?
My quad stability seems perfect so I dont know how more rotors could improve it and also one large prop/motor is a more efficient lifter than 2.
Anyway, I am H4 quad biased but willing to be convinced otherwise.
Replies
I did that with the eagle N6 V2 and the Rabbit V2
same thing happens, I put it a few inch forward from center (distance between all motors )and the whole thing wobble like nuts. it seems it has to be dead center for it to work. but what about the vertical how far above or below the motors should it best located.
I don't even know how the DJI NAZA guys do it. offsetting the FC w/o issue
guys question where to Put the FC for best stability? I know is center but how far from the thrust line vertically should it be located. above or below the prop
Im wondering if the hex configuration can spread out to leave a gap in the middle. Should work if the pitch and roll PIDs can be tuned separately. Alternatively a parallel hex layout with 3 motors each side in line.