LibrePilot Forum

Users => Vehicles - Fixed Wing => Topic started by: adilson on January 14, 2016, 11:39:58 pm

Title: Flying with with Revo, GPS< flying modes
Post by: adilson on January 14, 2016, 11:39:58 pm

Hello

I have quite a bit of experience with other systems like APM, Baseflight, Cleanflight, etc but I've been thinking about using LibrePilot with a Revo + GPS in a FPV flying wing. The problem is I can't find much documentation about it. I know the wizard will help me set it up but what about flight modes, stabilization modes, PID tuning, etc?

All the best

Title: Re: Flying with with Revo, GPS< flying modes
Post by: f5soh on January 14, 2016, 11:56:24 pm

Hi,
You should setup at least Manual, Attitude and Acro+ as stabilization modes.

For Revo calibration and others assisted modes look here:
https://librepilot.atlassian.net/wiki/display/LPDOC/Advanced+features

For Pid tuning you can use the TxPid module and affect a knob to Roll or Pitch Pids with EasyTune feature.
https://librepilot.atlassian.net/wiki/display/LPDOC/TxPID

Welcome,
Laurent

Title: Re: Flying with with Revo, GPS< flying modes
Post by: adilson on January 15, 2016, 02:04:48 am

Thanks for the reply. And those modes mean the same as for multirotors?

Title: Re: Flying with with Revo, GPS< flying modes
Post by: TheOtherCliff on January 15, 2016, 02:39:16 am

No.

Manual is zero stabilization.  Don't use manual with multicopters
Also, Rattitude and CruiseControl should ONLY be used on multicopters

Title: Re: Flying with with Revo, GPS< flying modes
Post by: f5soh on January 15, 2016, 07:27:22 am

Rattitude works perfectly with Flying Wing :)

"Manual" means you have direct control to servos thought board, like a normal setup Rx+servos.

Title: Re: Flying with with Revo, GPS< flying modes
Post by: TheOtherCliff on January 15, 2016, 04:07:24 pm

I hesitated with that one (Rattitude) since I had never tested it on fixed wing and had not heard of anyone who had.

Title: Re: Flying with with Revo, GPS< flying modes
Post by: adilson on January 15, 2016, 04:12:59 pm

Thanks for all the replies so, just to be clear I understand how they work on fixed wings:
Manual - bypass everything, direct control to the servos
Attitude - Full stabilization, surfaces level when there's no stick input
Acro+ - Rate mode?
Rattitude - Full stabilization up to some point of input and then rate?

Title: Re: Flying with with Revo, GPS< flying modes
Post by: TheOtherCliff on January 15, 2016, 08:10:00 pm

That's a good summary.  Acro+ is like sensitive Rate mode, but with a lot of expo to make it less sensitive around center stick.

Title: Re: Flying with with Revo, GPS< flying modes
Post by: adilson on January 15, 2016, 08:14:53 pm

Quote from: TheOtherCliff on January 15, 2016, 08:10:00 pm

That's a good summary.  Acro+ is like sensitive Rate mode, but with a lot of expo to make it less sensitive around center stick.

That sound a lot of fun on a fast jet :)

Title: Re: Flying with with Revo, GPS< flying modes
Post by: f5soh on January 15, 2016, 09:21:57 pm

Acro+ is "rate" around stick center and "manual" (direct command) at full stick.

With Acro+ no need to set a high rate velocity, can be 90degrees/s so no need expo, but rolls are done at max possible velocity without any limitation because max roll stick give max aileron deflection.

Title: Re: Flying with with Revo, GPS< flying modes
Post by: adilson on January 16, 2016, 01:19:09 pm

I decided to start small using a CC3D Atom in a bobcat. It does not have a rudder so can I configure as a normal airplane and just ignore rudder?

Title: Re: Flying with with Revo, GPS< flying modes
Post by: f5soh on January 16, 2016, 04:07:18 pm

Rudder is optional, no problem.

Title: Re: Flying with with Revo, GPS< flying modes
Post by: adilson on January 16, 2016, 07:51:28 pm

Good to know, thanks.
I'm having a strange behaviour. I'm using a Taranis with a D4R-II  (CPPM). Despite the fact I'm pretty sure the channel 4 (yaw/rudder) is correct, the radio wizard does not detect it. The others are fine AFAICT. Any tips?

Title: Re: Flying with with Revo, GPS< flying modes
Post by: f5soh on January 16, 2016, 08:07:36 pm

Try monitoring activity and move Yaw stick only.

SystemTab > UavoBrowser and search for ReceiverActivity

If not detected maybe is already detected as a wrong input, this can appears with channels that has to much jitter.