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Help needed to understand failed auto take off

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@Hugues wrote:

Hi,
I have a situation where auto take off does not succeed fully. What happens is shown in this video:

We see that the plane flies horizontally at the exit of the catapult, although the desired pitch is 20 degrees. We also hear that right after exiting the catapult the throttle is reduced from 80% (max throttle) to about 40% for an unknown reason. The observation is compliant with the log as shown on this screenshot:

My parameters values related to auto take off are :

AUTO_FBW_STEER : 0
TKOFF_THR_MINSPD : 2 m/s
TKOFF_THR_MINACC : 9 m/s
TKOFF_THR_SLEW : 0
THR_SLEWRATE : 100%
ARSP_FBW_MIN : 9 m/s
ARSP_FBW_MAX : 22 m/s
THR_MIN : 0%.
THR_MAX : 80%
TKOFF_THR_MAX : zero
THR_SUPP_MAN :zero
THR_PASS_STAB :zero
THROTTLE_NUDGE : zero
TRIM_ARSPD_CM : 1200
TRIM_THROTTLE : 45%

Any explanation(s) why auto take off fails ?

Thx

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