Lost on failsafe!!I

I'm using latest arduplane firmware and planner and have downloaded and Write Params to my APM1.x installed in a skywalker.

Now I want to make sure I understand failsafe but the directions seems confusing.

Here talks about it but doesn't say what parameters such as FS_SHORT_ATN, etc need to be set. In the downloaded skywalker parameter file they came as 0 in most of the ones related to failsafe.

http://code.google.com/p/ardupilot-mega/wiki/Failsafe

Here the various parameters associated with failsafe say it should be set to 1

http://code.google.com/p/ardupilot-mega/wiki/MAVParam

So how exactly should these be set to have the default behavior of circling for 20 seconds and then RTL.

FS_GCS_ENABL ?

FS_LONG_ACTN ?

FS_SHORT_ACTN ?

THR_FAILSAFE ?

any other ones I need to set and should all these be set to 1?

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Permalink Reply by Dan Ho on February 8, 2012 at 9:52pm

I second these questions.

Permalink Reply by Kitsen13 on February 8, 2012 at 11:45pm

FS_GCS_ENABL = 0

FS_LONG_ACTN = 1

FS_SHORT_ACTN = 1

THR_FAILSAFE = 1

Permalink Reply by steve F11music.com on February 9, 2012 at 8:10am

Thanks. I see GCS is ground control station so does enabling it mean if I'm using xbees and there is a loss of communication on my xbee 900MHz then it will start the RTL action?

FS_GCS_ENABLE - 0 = Off, 1 = On, If the GCS heartbeat is lost for 20 seconds, the plane will Return to Launch

Permalink Reply by steve F11music.com on February 9, 2012 at 10:19am
I prefer to skip the circle mode and go straight to RTL. How should I set it to enable that?
Permalink Reply by steve F11music.com on February 9, 2012 at 11:01am
I think I have a problem with my jr 9503 transmitter. I get the same 40 meter range whether the button is pressed or not. So I set like you indicated above and a few time I saw it enter circle mode and within a couple of seconds I had control again. Then one time it lost contact and instead of going into circle mode it flew directly away from me in a straight path and heading towards a mountain in front. I thought it would crash for sure but at about 20 seconds it did a RTL and came back home.

Any idea why it didn't enter circle mode and flew instead in a straight path? I would prefer it to do a RTL directly instead of going into circle mode.
Permalink Reply by Kitsen13 on February 12, 2012 at 5:30am

As i've explained in my last thread ( http://diydrones.com/forum/topics/failsafe-issues  ).

I've made some testing and I had the same issue.

I think failsafe must be the more reliable function, but it isn't yet.

It works but "sometimes" it doesn't

Same issue with the RTL. (long failsafe)

Permalink Reply by Don Brooks on February 12, 2012 at 8:48am
I find th best way to learn how to use and implement a feature like this is to use the HIL sim. Something to think about.

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