Brain setup problems - ideas please

[Sesame]

I know these are fresh out so theres not alot of experience out there yet, but I test flew my Brain on my nitro trex 600 on Saturday. The head seams fine but the tail is very wishy washy and there is alot of bounce on piros. the tail is holding in backward hurricanes but its wandering all over the place and feels very insecure.

The setup of the unit as long as you have played with fbl units before is quite straightforward. and didnt take long at all. although the software is basic it does its job, one think I did notice, once you have set your options in the software, next time you go back into the setup the system doesn't show you the options you made previously, which is a little offputing.

anyway back to the problem, im using a ds8900 on the tail so I have set the software to 1520us and 333mhz which are the figures I got from the net. so firstly can anyone confirm I have these correct. but then any other thoughts?

[GIXERMAN]

jr website says Flybarless Gyro Settings - JR Radios

Servo Frequency: 270Hz, Neutral Impulse: 1520ms

[Sesame]

ok thats going to help thanks

I took it from the Spartan Manual

"1520uSec servos capable of 333HzFutaba S9253 / S9254 / S9257 / S9650 / S3153 / S3154, JR 8900G /
3400G, Sanwa ERG-WRX, Airtronics 94758 / 94761, Hitec 5925MG /
6965HB, Robbe FS61BB, LogicTech 3100G"

[Obi Wan]

I know these are fresh out so theres not alot of experience out there yet, but I test flew my Brain on my nitro trex 600 on Saturday. The head seams fine but the tail is very wishy washy and there is alot of bounce on piros. the tail is holding in backward hurricanes but its wandering all over the place and feels very insecure.

The setup of the unit as long as you have played with fbl units before is quite straightforward. and didnt take long at all. although the software is basic it does its job, one think I did notice, once you have set your options in the software, next time you go back into the setup the system doesn't show you the options you made previously, which is a little offputing.

anyway back to the problem, im using a ds8900 on the tail so I have set the software to 1520us and 333mhz which are the figures I got from the net. so firstly can anyone confirm I have these correct. but then any other thoughts?

Hi Sesame,

I'm having similar problems with the tail and going on Helifreak - we are not alone.

Paul

[Sesame]

can you post links to the relevant threads so I can also keep up to date, cheers

[Obi Wan]

can you post links to the relevant threads so I can also keep up to date, cheers

Here's the relevant section - MSH Brain FBL Unit - HeliFreak

Check out Tail Tuning and a few other threads mention the tail problem.

[Lynx.1677]

I've been following that thread but they mostly waffle on about the YGE ESC and MSH governor.

[Lynx.1677]

I sold my Vbar yesterday and Brain comes tomorrow and will be setup and test flown tomorrow. I'll give a full report! Brave or stupid..........we will see!

[Nick B]

I sold my Vbar yesterday and Brain comes tomorrow and will be setup and test flown tomorrow. I'll give a full report! Brave or stupid..........we will see!

[Lynx.1677]

Hahah, Nick. I am bored of a perfectly performing heli so I want something to tinker with! :P

[Obi Wan]

Hahah, Nick. I am bored of a perfectly performing heli so I want something to tinker with! :P

Hi Lynx,

I took the mini Vbar off the Trex 500 and put on the Brain.
Definately the Vbar works better out of the box.

Some tinkering with the Integral and Derivate gain has improved the tail somewhat - but with a lack of manual it's hit and miss.

Paul

[Sesame]

yeah I found the same I was changing peramiters just to see what they would do, but as you say too hit and miss to give measurable results, im just pleased its on a heli I had that wasnt flying due to lack of fbl, if I had stripped the vbar off the 700 for it I would have been a little more annoyed at this point instead of just frustraited as not finding the answer an easy one lol.

[Lynx.1677]

I've been having vibe issues since day 1 on the vbar 500 Pro so am hoping the Brain will help cure these. Although I am sure it will bring it's own challenges.

[Sesame]

Bit of an update guys, went out this morning with my 600 and brain with a fist full of printouts from the HF posts(thanks to Paul) I hade the tail discussion Thread also, I think it was Fabian put on a glossary of all the settings and a brief description of how to run a setup and I have to say I had some great results, the tail bounce is still there but now only very slightly and with further reading Ive some more thoughts on how to deal with that although also reading it looks like this is a known fault(for want of a better word) and their working on it.

The stability on the tail is now wicked and it feels really stable in backward hurricanes, infact I flew my logo this afternoon and after that the tail on the vbar feel a little loose, so the lessons I learnt on the Brain I think i will be following through on the Vbar and hopefully improving it.

In conclusion im feeling alot happier about the unit and am actually looking forward to the morning and getting down and playing around with a few more settings

[jwatts007]

It was nice too see you give one a go Tony it looked good from where I was sitting.....