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HomeAircraftHelicopterFlybarless Rotor Head SystemsV-Bar › Dual Rate Settings
06-08-2014 04:07 PM  4 years agoPost 1
crashrc

rrNovice

Lafargeville, NY

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Mini Vbar
JR 9503

Test flew 550dfc at the field and heli was not as responsive as I liked, so I changed the dual rate settings on the ailerion and elevator to 125%.

This was not good! Tried to perform a roll and the heli stayed on its side instead of rolling completely over. I was able to correct but this was not the results I expected.

On the bench if I hold the alerion stick full left the swashplate pumps from center to left continuosly until I let go of the stick.

Is there a max settings for Dual Rate? Any Ideas?

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06-08-2014 05:50 PM  4 years agoPost 2
Sam2b

rrElite Veteran

Tacoma, WA

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Yes: with great caution you can do the following to achieve more (even much more) roll & flip rates.

1) First re-calibrate your transmitter endpoints back to 100% for aileron & elevator. Then, using the vbar software, adjust your subtrim to ensure the software says 100% for both directions of each.

2) Ensure you don't have any messages in your log that says "cyclic ring active." That would mean you need to increate the Cyclic Ring value in the swash setup (blue hat icon) by small increments.

3) Then, assuming you have the Pro version, if the max agility setting still isn't fast enough, you can manually input higher Optimizer values. For example: 55 and 55, or higher. You want to be careful since the cyclic can potentially be REALLY fast depending on the values, blades, heli weight, and headspeed combination, and it might be difficult to land. Also try using the maximum Style value to Vivid for a more alive feeling, as well as a value for paddle simulation. But, that all might be way too much, and almost be uncontrollable. But if you want...

I am paraphrasing what MrMel teaches this in one of his tweaks videos, and also with the warnings.

Watch at YouTube

_Sam B_

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06-09-2014 09:24 PM  4 years agoPost 3
crashrc

rrNovice

Lafargeville, NY

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Transmitter calibration ok, but I do have the "cyclic ring active" warning in the log.

I am wondering if this was caused by changing the dual rates on the alerion and elevator to 125%. I found the max expo is 115% that will not cause the swashplate jumping as previously mentioned.
The expo was raised on the rudder to 125% and I did not get the jumping like I did with the swashplate. Doesn't make sense..

I was unable to find any documentaion from Vbar about the max dual rate settings, wich I find frustrating (too much can cause unexpected results).

The collective setting is 75 and the cyclic is 72 which are both on the low side of the recommended settings. Now could this be causing part of the problem with the cyclic ring active error.

Going to change the expo's back to 100% and adjust the style and agility and see what happens. It looks like I need to change the servo arms and setup the collevtive and cylic again.

For future practice it seems to be better to setup the heli hot in the vbar and then tone it down in the TX with the dual rates, instead of starting soft in the vbar and increasing dual rates in the tx, that didn't work out to good for me..

Unless there is a too low dual rate setting for the vbar...
Never had this issue with my flybar.

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06-15-2014 08:54 PM  4 years agoPost 4
Sam2b

rrElite Veteran

Tacoma, WA

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The collective setting is 75 and the cyclic is 72 which are both on the low side of the recommended settings. Now could this be causing part of the problem with the cyclic ring active error.
Likely so, yes in my opinion.

So, what EVER you do, ONLY set the vbar software's TX bars to be 100/100 on the aileron, elevator, and rudder. No less, and no more that 100/100.

Then, just as I stated above, it is possible have a SUPER HOT setup if you do what I recommended on both the agility and manual optimizer values. The video also says that too. Only then you can use your
physical transmitter's dual-rate with a lower value, like 75% or what ever you choose. Just don't use greater than 100% on the transmitter settings or the vbar software TX bars.

Lastly, you said 150% expo on the rudder vbar settings? The default is 50%. What made you need to set 150%?? You can have a butter-smooth tail while keeping the expo at 50% in the Vbar software. Just lower the rate setting a bit, and also lower the Acceleration value for the tail, something like 30. The Acceleration value softens the start and stop of your rudder input, but then won't be as crisp to make a "BAM" pirouette stop. Nonetheless, the vbar will still hold the tail fine with a lower Acceleration value (if all else is setup correctly).

_Sam B_

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