FBL ~ Cyclic

[tourerjim]

Not a subject i could find in seaching only for flybarred, so question is what's the max cyclic degrees do you use setting up your fbl heli.

[milly0812]

Not a subject i could find in seaching only for flybarred, so question is what's the max cyclic degrees do you use setting up your fbl heli.

It depends on the FBL controller. Beast x wants 6 deg, v bar wants 8 deg and 3gx is diff again

[tonystevens]

You set the max amount you can get without binding, usually ends up a lot higher than a flybarred model and probably wont ever reach the full amount in flight but its there for the unit to use if it needs it, and as Don said different systems will ask for a set value. 6' for bx and 8' for v bar (not sure on other systems) as a check that your head geometry is correct for that fbl system

[tourerjim]

I'm aware of the degrees required through the controller setup, this is the seup through controller parameters.
I did find a bit of info that fbl heli cyclic should be about 8 to 9 degrees but Vbar 3GX & Beastx default settings is about 13 degrees.
I'll have a look later see if i can find that bit of info again.

[KevDavies]

Vortex you tell the unit where 8 degrees is and I have my max set at 12 degrees!!

Yes its like a gnat on speed LOL

[tourerjim]

Vortex you tell the unit where 8 degrees is and I have my max set at 12 degrees!!

Yes its like a gnat on speed LOL

But you are able to lower 12 degrees if you wanted.?

[KevDavies]

yeah from memory I can set it between 6 and 18 degrees. The unit needs to know where 8 degrees is so it has a reference point for the algorythms. But in the datapod you tell it how much you want at max travel.

[waveydavey]

But you are able to lower 12 degrees if you wanted.?

You can set it to what you want, the problem is that lower the headspeed and the unit to have the same roll/flip response would have to add more cyclic to maintain the rate requested. Its a rate command control system and needs headroom to perform. I run real dumbed down dual rates on my 600 that I was using for my B practice I still set the unit for maximum cyclic and tuned the rates on the endpoints to suit me. Its difficult to then measure as you can't do this on the bench

[coolice]

Hey.

Speaking with the Osbourns yesterday after they'd had a conversation with Nick Maxwell on the vbar, he sets more than the required 8 degrees cyclic pitch set point required in the manual.
Apparently this affects the gain of the fbl unit and their trials so far have proven this as they need to run a lower cyclic gain. Also as expected flip and roll rate increases.

It is advised to run as much cyclic pitch as you can before binding, as the units are rate demand they throw in the required amount of pitch to achieve a commanded flip and roll rate in degrees per second.
.

[JoeBailey]

This is a common trick used on low head speed machines Ian. My G4 runs 9.5 degrees. It's used to counter the sloppy controls due to low rpm and it works great to a point.

Joe

[tourerjim]

You can set it to what you want, the problem is that lower the headspeed and the unit to have the same roll/flip response would have to add more cyclic to maintain the rate requested. Its a rate command control system and needs headroom to perform. I run real dumbed down dual rates on my 600 that I was using for my B practice I still set the unit for maximum cyclic and tuned the rates on the endpoints to suit me. Its difficult to then measure as you can't do this on the bench

Arrr right.! i was getting to that point 3GX uses roll rates for same reason & can relate to 3gx language but struggling to get my head around the Fubar/Vbar so which parameter would it be for the aile/ele cyclic rates.?

[JoeBailey]

I believe agility is the base setting for the rates. Just wind it well up more is definatly more fun .

[tourerjim]

This is a common trick used on low head speed machines Ian. My G4 runs 9.5 degrees. It's used to counter the sloppy controls due to low rpm and it works great to a point.

Joe

What fbl controller have you on this one.?
I've found that my heli's prefer cyclic degrees 9.5* then role rates to give me a nice cyclic control feel but the Fubar now on my 500 struggling to understand same language, to me its got way to much cyclic @ 13* & can't find the rate setting to control what seems excessive cyclic behaviour.

[waveydavey]

I think what Joe is saying above is that in the setup for the V bar he has 9.5 degrees. This changes the gain settings for the cyclic overall because of the low headspeed. What youre describing is the amount of cyclic available, this can be changed using the agility.

[JoeBailey]

It's on a vbar, tried and tested for low head speed.

To adjust max cyclic you need to go into the vbar/fubar setup menu and go to cyclic section. You then click "set" I think and use the slider to set the max cyclic pitch with blades pointing along the boom. You then do the same for collective. If your running a normal head speed then 8 degrees is perfect on a vbar.