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Spirit FBL system Spirit FBL System Discussion


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Old 08-29-2021, 06:10 PM   #1 (permalink)
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Default SCALE: Small But Annoying Delay to Inputs...

I'm testing the airframe of my first FBL/Scale Trex500 with new Spirit 2 and a bank with no stability activated. I'm comparing it to my already built Flybar/Scale Trex500.

I'm familiar with Spirit, I have it on 3 other 3D helicopters, but can't say I know all the parameters well, as those all fly fine with only one or two changes to the baseline settings.

This Trex500 build has a slight delay to slow small inputs. Maybe I don't notice it on the 3D helicopters because my inputs are larger and faster.

What parameters should I examine? Flight style? Deadband? Feed Forward?

I setup both tail and cyclic gains in my transmitter so they are easy to tweak and I have them up pretty high, similar to my other Trex helicopters with Spirit, so I don't think it is a gain issue.

According to my "Connection" screen, the Spirit2 came with the latest firmware 3.3.2.
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Micros: Hisky HCP80, ESKY 150x,K110, Trex-150X x 2 Mid: Oxy 3 T 2018 Version, Oxy 4 360 Big: Trex-500X, Oxy 5, Trex-550X, Trex-700X Scale: MD500 TOW Defender (Trex 500 size) Vintage: Trex 450 SE V2

Last edited by ic-racer; 08-29-2021 at 06:30 PM..
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Old 08-29-2021, 06:26 PM   #2 (permalink)
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For my setup, I did NOT use the Wizard.
I did BEC check, which was OK
I did vibration analysis in all the axes and all were OK
I set the channels, servo direction, pulse, frequency, 0pitch, flat swash, 6degree parameter, maximum pitch 11 deg, cyclic ring, rudder endpoint.
Stability function = rescue via dedicated channel.

Didn't touch any of the other settings from how they came up in the software as follows:
Flight style 4
Rotation speed 8 and 8
Elevator filter 2
Rudder delay 8
Revomix 0
Cyclic FF 5
Rudder dynamic 6
Pirouette consistency 160
EXPERT SETTINGS: Deadband= 10, all others 0
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Micros: Hisky HCP80, ESKY 150x,K110, Trex-150X x 2 Mid: Oxy 3 T 2018 Version, Oxy 4 360 Big: Trex-500X, Oxy 5, Trex-550X, Trex-700X Scale: MD500 TOW Defender (Trex 500 size) Vintage: Trex 450 SE V2
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Old 08-31-2021, 10:39 AM   #3 (permalink)
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What I did was to put FLIGHT STYLE and FEED FORWARD on the two knobs on the front of my transmitter.

Frankly, with a low headspeed, just hovering around, I can't tell much difference in these settings. Seems Ok with the two knobs at about 3:00 (higher values than middle). I'll probably leave it that way.

I also decreased deadband from 10 to 7, this may have helped too.

Upped the cyclic gain a little too.

Probably ready to install the mechanics in the Fuselage today!
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Micros: Hisky HCP80, ESKY 150x,K110, Trex-150X x 2 Mid: Oxy 3 T 2018 Version, Oxy 4 360 Big: Trex-500X, Oxy 5, Trex-550X, Trex-700X Scale: MD500 TOW Defender (Trex 500 size) Vintage: Trex 450 SE V2
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Old 08-31-2021, 11:33 AM   #4 (permalink)
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did you check the "rudder dynamic"? if this one is set (too) high this could lead to delayed tail response too!

Ciao
Michael
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Old 08-31-2021, 12:08 PM   #5 (permalink)
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Quote:
Originally Posted by ic-racer View Post
What I did was to put FLIGHT STYLE and FEED FORWARD on the two knobs on the front of my transmitter.

Frankly, with a low headspeed, just hovering around, I can't tell much difference in these settings. Seems Ok with the two knobs at about 3:00 (higher values than middle). I'll probably leave it that way.

I also decreased deadband from 10 to 7, this may have helped too.

Upped the cyclic gain a little too.

Probably ready to install the mechanics in the Fuselage today!
Think of the cyclic feed forward tuning like a "FBL unit bypass" as this controls the amount of FBL unit pass through filtering and ultimately the connectivity feel between the response at the model vs your sticks.

You can tune to where the model feels more like a FB model where you are in direct control of the servos. Too much the other direction and it will feel like there is a slight delay on the model side vs the sticks, and you end up chasing the model rather than flying it when doing small, hover like movements and stick corrections. It's similar feel to using too much expo on the TX
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Last edited by Xrayted; 09-01-2021 at 09:21 AM..
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Old 08-31-2021, 08:46 PM   #6 (permalink)
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Quote:
Originally Posted by Rabid121 View Post
did you check the "rudder dynamic"? if this one is set (too) high this could lead to delayed tail response too!

Ciao
Michael
Thank you.
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Micros: Hisky HCP80, ESKY 150x,K110, Trex-150X x 2 Mid: Oxy 3 T 2018 Version, Oxy 4 360 Big: Trex-500X, Oxy 5, Trex-550X, Trex-700X Scale: MD500 TOW Defender (Trex 500 size) Vintage: Trex 450 SE V2
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Old 08-31-2021, 08:50 PM   #7 (permalink)
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Maiden with the A109 fuselage was great. I also brought the Flybar MD500 to compare side by side. Got them flying with nearly identical 'feel.'

Next build is the Align UH-60 Blackhawk. Since the A109 files great, I'll start by just copying everything; servos, FBL settings, 4-blade head and blades, ESC, Motor, receiver, etc.
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Micros: Hisky HCP80, ESKY 150x,K110, Trex-150X x 2 Mid: Oxy 3 T 2018 Version, Oxy 4 360 Big: Trex-500X, Oxy 5, Trex-550X, Trex-700X Scale: MD500 TOW Defender (Trex 500 size) Vintage: Trex 450 SE V2
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Old 09-01-2021, 08:50 AM   #8 (permalink)
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Hi ic-racer, did you change any of your original posted settings ?
Going to do something very similar so just looking for a starting point, thank you.
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Old 09-01-2021, 11:05 AM   #9 (permalink)
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Quote:
Originally Posted by Thtasher View Post
Hi ic-racer, did you change any of your original posted settings ?
Going to do something very similar so just looking for a starting point, thank you.
I have the transmitter knobs at about 3:00 with Spirit's Real-Time tuning, so on my transmitter servo travel bars both channels are about 75%. I have not connected to Spirit Setting Software to see where the respective FLIGHT STYLE and FEED FORWARD numbers fall, but probably half way between the middle and full right on the software setup slider control.
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Micros: Hisky HCP80, ESKY 150x,K110, Trex-150X x 2 Mid: Oxy 3 T 2018 Version, Oxy 4 360 Big: Trex-500X, Oxy 5, Trex-550X, Trex-700X Scale: MD500 TOW Defender (Trex 500 size) Vintage: Trex 450 SE V2
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Old 09-03-2021, 07:38 AM   #10 (permalink)
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I just took the settings off the knobs and fixed them in the Spirit settings. The values were Feed Forward = 10 and Flight Style = 7
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Micros: Hisky HCP80, ESKY 150x,K110, Trex-150X x 2 Mid: Oxy 3 T 2018 Version, Oxy 4 360 Big: Trex-500X, Oxy 5, Trex-550X, Trex-700X Scale: MD500 TOW Defender (Trex 500 size) Vintage: Trex 450 SE V2
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