L Edge
Legendary member
Being a long winter, decided to revisit my one project that has kicked my butt, time and time again. Started with an FC that was known as a KK2 board and Open AERO software.
My goal was to design a VTOL that has no moving control surfaces and be able to tilt on liftoff and lean into the wind to hover all well go and return from forward flight. Maybe add a camera if it works as well to see what acrobatics you can do since you have thrust vectoring.
In the past, flew it as a plane and took off vertical(full power) no FC board and landed it like a normal foamy without gear. The troubles begin when the FC board and software data was added to learn how to hover as a bi-copter. Best I could do is get the PID's functioning and it was all over the place and never was stable. Since this was one of the earlier FC's, very little info could be shared since no one had experience with my version. The only thing was a booklet describing the function and the range of numbers that you could use. Trial and error built your knowledge base.
This is what it looks like for my first and only model. It only require 2 high speed metal servos glued to the airfoil and the motor/props are mounted to the servo arms. Used cw/ccw props to keep torque minimum.
For horizontal flight, differential thrust is yaw, pitch is either both servos pointing up/down, and roll has one servo going down and the other up and reversed for the other direction. Fixed rudders were added downwind of the propwash for stability and to launch in vertical mode.
This is the fun part. When vertical, transmitter up pitch cause the nose to tip to you and down pitch has it move away from you. Your transmitter aileron has the plane rotate about the center and when the rudder is moved, it slides either left or right. My troubles existed due to not be able to lock in the model caused by turbulence on lift off and hovering.
Enough for today
.
My goal was to design a VTOL that has no moving control surfaces and be able to tilt on liftoff and lean into the wind to hover all well go and return from forward flight. Maybe add a camera if it works as well to see what acrobatics you can do since you have thrust vectoring.
In the past, flew it as a plane and took off vertical(full power) no FC board and landed it like a normal foamy without gear. The troubles begin when the FC board and software data was added to learn how to hover as a bi-copter. Best I could do is get the PID's functioning and it was all over the place and never was stable. Since this was one of the earlier FC's, very little info could be shared since no one had experience with my version. The only thing was a booklet describing the function and the range of numbers that you could use. Trial and error built your knowledge base.
This is what it looks like for my first and only model. It only require 2 high speed metal servos glued to the airfoil and the motor/props are mounted to the servo arms. Used cw/ccw props to keep torque minimum.
For horizontal flight, differential thrust is yaw, pitch is either both servos pointing up/down, and roll has one servo going down and the other up and reversed for the other direction. Fixed rudders were added downwind of the propwash for stability and to launch in vertical mode.
This is the fun part. When vertical, transmitter up pitch cause the nose to tip to you and down pitch has it move away from you. Your transmitter aileron has the plane rotate about the center and when the rudder is moved, it slides either left or right. My troubles existed due to not be able to lock in the model caused by turbulence on lift off and hovering.
Enough for today
.
