Pointless FBL Question.

[Gate88]

I've been following the FBL threads (and videos) with interest but it's led me to wonder what would happen if you fitted the FBL electrics to a model with a flybar?

Would it just make it ultra stable or overdrive everything till it hit the floor?

[Dedcalm]

I guess that would depend on what gains you were using on the roll/pitch axis. I would expect that it would still fly, I would also expect the electronic damping to be faster than the mechanical although I could be wrong with this - guess it depends on how stiff the feathering spindle dampers are and how heavy the paddles are.

No doubt someone will try it eventually... certainly this would be how I would go about developing a product in the early stages.

[GravityKills]

there is a chance that it would go berserk, because the mechanical flybar causes a delay.
That is, by the time the correction movement arrives at the blades, the controller has already changed its mind.

If I were to try, I'd start with a very low gain and at a safe distance :-)

[0h5h1t]

apparantly the upcoming Curtis fbl system can be programmed for use with a flybar. interesting decision to include that ability i think.

[GravityKills]

yes, it might make sense - use a shorter, light flybar for cyclic and short-term stability, and the controller to prevent pitching up and drifting.

Sooner or later we might see a flybarless controller with a RPM sensor for the head, that adapts its nick / roll rates during autorotation to the headspeed, like a conventional flybar does.

[serpent887]

apparantly the upcoming Curtis fbl system can be programmed for use with a flybar. interesting decision to include that ability i think.

Hi Karl,
The Gyrobot900 offers this option too, I know this cos I owned 3 of them.

[0h5h1t]

Sooner or later we might see a flybarless controller with a RPM sensor for the head, that adapts its nick / roll rates during autorotation to the headspeed, like a conventional flybar does.

that would be a vast improvement to any fbl system, couldn't agree more.

[J-S-Q]

I once tried a Gaui GU-365 on a flybarred TRex 450 just out of curiosity. I only did a couple of flights on it and I'd say it just felt more stable and possibly a bit like it had heading hold on the cyclic (i.e. if you tilted the heli it would tend to stay tilted more so than normally). I didn't fly it enough to draw many more conclusions but certainly it didn't do anything really bad or strange.

[est1976]

apparantly the upcoming Curtis fbl system can be programmed for use with a flybar. interesting decision to include that ability i think.

I understood differently

Originally Posted by Buzzin Brian
Here are the basics on the Total-G. It is not just a fight control system. Of course it also has a mini-G gyro, and ATG, and acts as a Spektrum receiver. You can deactivate the flight control system in the Total-G, yet still get to use the tail gyro, ATG governor, and use the unit as a Spektrum receiver. Actually all of the electronic addons can be deactivated if you wish. So you are not forced to use anything you do not want to.

I hope this clears some things up.

Brian

I beleive that is to mean that the flight control system can be deactivated if you want to run the Total-G, but you are not sure if you want to go flybarless.

The Total-G can utilize the internal ATG to govern electric by installing a magnet in a constant driven tail gear. (the flat grear under the main gear) You then use the same sensor that the ATG uses in a nitro machine to sense the magnet. You then set the ATG into gear ratio 10 (1 to 1) and the governor acts the same as it would in a nitro machine. The ATG V3 actually is capable of doing the same thing, we just done advertise it.

I hope that makes sense.