After several weeks of Flying with this plateform it's time for conclusion.
Avantages of OctoV : Payload can be 1 Kg
Autonomie can reach 5 mn with 4S 5000MAh
Against the Wind it flies well
One time the OctoV just fall down from 20 meters (no more juice) but the plateform stay horizontal and the Camera was safe :) 3D camera (really expensive).
I Fly with 2.0.42 ... 10 inch propeller and this stability is perfect.
Can be hard to YAW when the total weight is 4 Kg (YAW PID may need more P ???).
For the construction i use 1 meter Alu (15mm) without any cut :)
I encourage everyone to take the risk of building tha platform, you ll not regret !!! I finally sell it to a movie companie :) makes me sad but technology need to be share to those people. They want to make a movie in Maroco ( they told me about a car race) and for sure they need me to pilot the machine. I FOUND A JOB !!! MUM can be proud now :)