Super-Hornet
Veteran
Location: Singapore
| On a flybarred helicopter:
The flybar+weight (weight from paddle itself) will provide the stability. It is actually a simple mechanical gyro. What it does is that it will auto correct the heli position by changing the blade pitch.
When u take away the flybar+weight, you lost the stability assist coming from that simple mechanical gyro. With that, the whole stability of the heli is just coming from the weight of the blades itself. In big heli, it is still flyable because of the weight of bigger heli and the blades. In small heli, it is very difficult to fly it.
The idea of using gyro to provide stability in flybarless is simply to "mimic" the behavior of the flybar+weight.
What it does is actually sense the heli Aileron and Elevator movement. Suppose the heli is subjected to external forces (like wind) that causes the nose of the heli goes down (tail goes up), the gyro sense it and apply signal to change/move the servo in such a way that the swash plate tilt backward (as if u apply elevator by pulling the nose up)
In mCCPM, each axis of the swash plate (Aileron and Elevator) is controlled by a single servo or single channel. With that, to apply gyro to it, u just simple connect a gyro between the RX and the servo (e.g. connect gyro i/p to the RX's Elevator and gyro o/p goes to the elevator servo). Think of it like normal way u connect tail servo.
In eCCPM, each axis (Elevator, Aileron and Collective) is controlled by more than 1 servo. Thus u have a mixture signal of 2 or more servo moving in the same direction and sometime move in different direction. Because of that, u cannot connect gyro directly between RX and servo. This is how a onboard eCCPM system come about. What it does is that, instead of setting your TX to be in eCCPM mode, u configure it as if you are flying a mCCPM heli. The onboard eCCPM system then take the sign from RX and then mix it up to become eCCPM. In that way, u can connect gyro between RX and the onboard eCCPM system.
In the commercial version of flybarless system (like V-Bar), not only it provide you the generic stability assist mention above, it has a lot more features that mainly design for 3D in mind.
SH |
I guess I am not the only one talking good about that unit... and just trying to keep this thing up in conversation, as I think that it is working good and seems to make lots of people happy out there. What do you think? Tried it already or know someone?
Now i'm really happy
