Aura FC8 Reference Library

[bob_nj]

Hi guys

Let's say we have a fast 3D rate with high gains and slow 3D rate with low gains all on a proportional knob/slider.
Assume all of the surface deflections are equal in both the fast rate and slow rate.

What's the real difference between using the slow 3D rate with full gain, and the fast 3D rate with say half gain?

I can't get to the board while at work, so I'll check later this afternoon/evening.

Thanks
Bob

[Cosmith]

Hi guys

Let's say we have a fast 3D rate with high gains and slow 3D rate with low gains all on a proportional knob/slider.
Assume all of the surface deflections are equal in both the fast rate and slow rate.

What's the real difference between using the slow 3D rate with full gain, and the fast 3D rate with say half gain?

I can't get to the board while at work, so I'll check later this afternoon/evening.

Thanks
Bob

Hey Bob...gain determines how strongly the gyro corrects unwanted movement. When you are flying your plane slowly it takes much larger control surface input to achieve the same movement as a small input at high speed, due to the amount of air flowing over the surface. Therefore, higher gains at low speed allow the gyro to make larger corrections.

The reason we do low gains for high speed is to prevent oscillation. This occurs when the gyro over corrects and then has to correct it's over correction.

In theory we always want to run the highest gain possible that doesn't cause oscillation, this means the gyro is as effective as possible.

Clear as mud? Hope that helps!

[bob_nj]

Thanks Cosmith, and I get all of that.
I'm just wondering if reducing the fast 3D rate with high gains has the same affect as using the slow 3D rate if that makes any sense.

Thanks
Bob

[Cosmith]

Thanks Cosmith, and I get all of that.
I'm just wondering if reducing the fast 3D rate with high gains has the same affect as using the slow 3D rate if that makes any sense.

Thanks
Bob

I suppose that could work, assuming gain is relative to total control surface travel, however it wouldn't be 3D rates any longer! Probably wouldn't work too well with any gyro that still uses the double rates/flight modes from your radio...the Aura is different than everything else I'm aware of because it knows your travel settings, subtrims, etc.

I guess the only question I have is why? I probably use maximum deflection more often in my '3D Fast' flight mode more than the other flight modes for doing maneuvers such as pop tops...so for me that wouldn't be practical and no easier than just lowering gains.

[bob_nj]

I suppose that is my real question.

I use high gain with a slider, middle gain with a slider, and low gain with a slider.
I'm just wondering if the hi gain mode with a low slider/proportional gain is the same as the low gain mode with a high slider/proportional gain.

Sorry if it doesn't make sense.
It's been a long day.

Bob

[JoeT]

The only difference between the 3D and other modes is stick priority and individual gains.

In 3D mode Stick Priority is 100%
In regular other mode it hovers between 40 and 55%.

Short answer is, its more than just gains.

[tbrum]

Joe... Gonna have to setup some time with your next week over a coffee so we can go over the tabs in the programming. I downloaded and imported the program file and wrote it to the Aura. But before I go plug it in, I really need some further explanation on all the setup tabs.

[JoeT]

Joe... Gonna have to setup some time with your next week over a coffee so we can go over the tabs in the programming. I downloaded and imported the program file and wrote it to the Aura. But before I go plug it in, I really need some further explanation on all the setup tabs.

I have some time this morning from 10:00 - noon, I'm in mississauga today.

[JoeT]

Interesting observations.. Hummmm

On my 120cc Sukhoi, depending on the type of flying done, I usually use up anywhere between 250 - 500Mah / flight. I also normally use 2 x 3700 Mah LiPo's to power up the plane.
This plane has 10 Servos:

1 Choke
1 Throttle
4 High Torque Ailerons
2 High Torque Elevator
2 High Torque Rudder
IBEC for Ignition

Controlled by Aura, are a total of 8 servos.

As mentioned above, on a normal flying day, I could fly the whole day with 2 x 3700 Lipo's and still be pretty much at least 1/2 capacity. Yesterday after 6 or 7 flights (can't remember, was overwhelmed by visiting dignitaries with wearing no belts.. hahahah) the total remaining capacity was at 30%.. This means, I used up a total of 5180 Mah over 6 or 7 flights, but I can't remember. HOLY MOLY!!!!

Range will be: 740 - 863 Mah / Flight.

Up all those corrections from the Gyro takes up some energy.

[bob_nj]

As the Godfather once said;
That's the price you pay, for the life you lead!

Was it windy?

Just have to keep a close eye I guess.
Since my 100 mAh 1/2 a days, I've gotten in the habit of charging after each flight.
Doesn't cost anything, and I'm just standing around anyway.

Just me...