firmware 2.8 - don't use Flight planner and 'AUTO' mode !!!

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APM 2.5 arducopter, new firmware 2.8
Mission planner 1.2.14 mav 1.0

after wypoint "2" (not 3) arrived to "home", completely gone throttle and 
dropped from 15 meters altitude.
waypoint's screenshot: http://www.reboot.lt/planner.jpg

My Hexacopter break into pieces. At now i'm afraid your soft... 
all my money go to spend to rubbish.

Original issue reported on code.google.com by smscentras on 22 Oct 2012 at 2:00

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Original comment by smscentras on 22 Oct 2012 at 4:29

Attachments:

• problem_log.rar

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Logs show the RTL coming home, you cut the radio throttle to zero while it was 
in Loiter Mode and entered  Stabilize mode with the throttle still cut. So the 
model falling out of the sky did exactly as you commanded it. 
It's the same as if you were flying manually and pulled the throttle to zero. 
It would drop like a rock.

Here is the end of the log: 473(the first field) is your throttle command from 
the radio. Time is .1 seconds per entry.

CTUN, 473, 0, 412, 200, 18, 8, -57, 375
CTUN, 473, 0, 403, 200, 21, 9, -74, 379
CTUN, 473, 0, 403, 200, 27, 8, -37, 384
CTUN, 473, 0, 396, 200, 20, 4, -54, 373
CTUN, 473, 0, 387, 200, 23, 3, -72, 375
CTUN, 473, 0, 379, 200, 28, 2, -76, 379
CTUN, 473, 0, 372, 200, 29, 2, -73, 380
CTUN, 473, 0, 356, 200, 30, 4, -117, 383
CTUN, 473, 0, 347, 200, 41, 3, -104, 393
CTUN, 473, 0, 341, 200, 44, 0, -82, 393
CTUN, 460, 0, 336, 200, 38, 2, -66, 389
CTUN, 0, 0, 327, 200, -2, 0, -78, 347     << Throttle input is now zero
CTUN, 0, 0, 327, 200, -19, 5, -39, 335
CTUN, 0, 0, 309, 200, -27, 3, -110, 325
CTUN, 0, 0, 288, 200, -14, 5, -160, 340
CTUN, 0, 0, 263, 200, 0, 5, -205, 354
CTUN, 0, 0, 242, 200, 15, 4, -208, 368
CTUN, 0, 0, 226, 200, 19, 5, -184, 373
CTUN, 0, 0, 228, 200, 14, 7, -82, 370
CTUN, 0, 0, 235, 200, -10, 6, -6, 345
CTUN, 0, 0, 246, 200, -33, 5, 52, 321
CTUN, 0, 0, 251, 200, -52, 5, 51, 302
CTUN, 0, 0, 251, 200, -57, 4, 25, 296
CTUN, 0, 0, 258, 200, -52, 4, 47, 301
CTUN, 0, 0, 260, 200, -57, 1, 33, 293
CTUN, 0, 0, 258, 200, -54, 1, 6, 296
CTUN, 0, 0, 261, 200, -47, 2, 18, 304
CTUN, 0, 0, 261, 200, -49, 2, 9, 302
CTUN, 0, 0, 254, 200, -48, 2, -31, 303
CTUN, 0, 0, 249, 200, -39, 3, -41, 313
CTUN, 0, 0, 247, 200, -34, 4, -31, 319
CTUN, 0, 0, 238, 200, -36, 4, -61, 317
MOD:STABILIZE, 349    << Entering manual control

 ,3_in, sonar_alt, baro_alt, next_alt, nav_throttle, angle_boost, climb_rate, 3_out, alt_hold_I, throttle_I
CTUN, 0, 0, 233, 200, 0, 1, -56, 0
CTUN, 0, 0, 242, 200, 0, 0, 17, 0
CTUN, 0, 0, 249, 200, 0, 0, 43, 0
CTUN, 0, 0, 247, 200, 0, 0, 11, 0

...Crash...

Original comment by jasonshort on 22 Oct 2012 at 4:48

• Changed state: WontFix

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but i have not moved sticks, do not change modes and etc. All actions was 
automatically after RTL. 
when copter fall,- only at this moment i tried to increase the motors speed, 
but.. they are not spin, only after crash tried to spin, lol.

Original comment by smscentras on 22 Oct 2012 at 5:04

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So you're saying you didn't enter Stabilize mode and the throttle was at the 
mid-point?
You must have lost radio contact then? 
Many radios have failsafe defaults that set the throttle to Zero and it could 
have also set the CH5 to low or stabilize.

Original comment by jasonshort on 22 Oct 2012 at 5:15

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did not lost radio contact, FrSky with telemetry module do not beep at this 
moment.

checked radio failsafe:
throttle: ~45%
mode: RTL

who know where can be problem ?

Original comment by smscentras on 22 Oct 2012 at 5:39

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Maybe this checkbox make problem with throttle ?

Original comment by smscentras on 22 Oct 2012 at 5:51

Attachments:

• throttle_failsafe.jpg