e-copter
Senior Heliman
Location: Nice, France
| Hello,
here are a few informations about the flybar system.
The whole informations for techies geeks will be available in english in the patent as we are translating it for worldwide application (already applied in Germany with worldwide aplication in process).
Basic principle was to get the following:
- Having the rotorhead behaving the way you input the orders on the stick ( not to have to compensate on aileron when making a front flip for example, or having the heli coming out of a loop straight...)
- Having high pitch authority
- Avoiding having aileron / elevator "glitches" when sollicitating the pitch heavily. (Making up / down /up / down withouthaving the heli going left or right. This matter is managed by using H2 instead ohf H3 as in H3 CCPM all servos are linked to the pitc and failure or weakness of one of the three brings to aileron / elevator erratics inputs when pitch resources are extreme. H1 works as well but there is only one servo for pitch inthat case.Using H2 allows to have 2 servos ( AIleron and pitch) inputs for pitch , so no interation elevator / aileron and higher force and reactivity to the pitch..
Now about the rotorhead itself: This is a whole group of different things making the standard rotorheads acting differently as lot of things are involved in a rotorhead:
Gyroscopic precession, of both FLybar and rotorhead, dampening, delta offset, airfoils, and forwarding/ backwarding phenomenas of main blades and lmuch more even like the tail rotor turbulences in the rotor head airfoil.
I will not enter in the details but basically, the flybar is not moving up and down even if there is no washaout ( the little hat on the top of the rotor head moves up and down and removes the need of washout).
The flybar acts as a normal flybar, but it's tilting is not only up vertical but horizontal as well, from 83 to 97° compared to main rotor axis.
This allow to compensate mechanicaly the gyro precession effect and forwarfing / backwarding + the geometrical mixing diferences due to round travels of commands, and brings the rotorhead to act in the air as if you had the heli "locked " in it's position or in the input you give it.
THis is kind of strange at the firstflight, as we all are used to give some "automatics" inputs on the stick to make straight loops and flips or other manoevers. When you first fly it, you can notice that when you launch for example a front flip, the heli will move on the left on aileron side.. Just restart the manoever and look at your fingers, this is your input on left that gave this 
So jst start the manoever again just with elevator and look at the result
THis is quite hard to describe such a thing, there has been 3 years of development and tests on this rotorhead from Uwe.
The best thing we could do is to make a movie with normal rotorhead and then with the RZK one and show the sticks inputs for same manoevers on both, but we do not have the hardware to do that for the moment.
If you want more informations, please send me a PM or an email as we are now on RR as manufacturers and we have to follow the same rules as the others here, which is totaly normal, so we can not put too many informations like that.
But we wil answer the questions with no problems, for any product update or news or pictures, they will be put on our websites regularly.
Thanks for you interrest in this heli,
BEst regards,
Fabien & Uwe |
