How to slow airspeed down on approach & landing

When performing an autolanding how do you get arduplane to slowdown the fixwing?
PF_ & LAND_ airspeed parameters seem to have no affect.

Note: I am using an airspeed sensor.

Arduplane can’t “slow down” without reverse thrust. You must rely on physics instead. That means a shallower slope in most instances. If you have flaps, it can be a steeper slope.

The primary parameters controlling the flare slope is TECS_LAND_SINK. That in combination with LAND_FLARE_ALT will do a lot of work in controlling your landing position and speed.

If your plane is too fast and the throttle is already at 0, ardupilot can’t don anything.

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Throttle is a zero and the motor is still rev’d up & supplying thrust like the throttle is commanded to a value greater thar zero (and I have the throttle on the controller pulled all the way down).

Post a log. TECS_LAND_ARSPD and TECS_LAND_SPDWGT would probably control that. From the code, “A SKE_weighting of 2 provides 100% priority to speed control.” TECS_LAND_SPDWGT should probably be increased if what you are saying is true.

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Nathan
I will post a log however it will be 5-APR before I will be able to do so.

Oh … amd 1 more thing, TECS_LAND_SPDWGT is set to -1

try to active the ESC Breaking.

it can be spinning cause by the airflow. do you use folding propeller ?

So what is TECS_SPDWEIGHT?

@jstarch You have a ton of question about landing and it’s legitim IMO
Did you consider SITL to test before real flight ?

I will have to check when I am able to get back in front of it (4-APR).
I will post then …

Nathan

TECS_LAND_ARSPD=6.5

TECS_LAND_SPDWGT=-1

TECS_THROTTLE=-1

Here is the info you were asking about …

see attached.

Your thoughts?

I still need to figure out how to sucessfully extract a usable log file.

TECS_LAND_ARSPD=6.5

TECS_LAND_SPDWGT=-1

TECS_THROTTLE=-1

Here is the info you were asking about …

see attached.

Your thoughts?

I still need to figure out how to sucessfully extract a usable log file.

I think the DO_CHANGE_SPEED command should do the trick.

Thanks …
Was thinking about just going ahead & using that command.

Thought the autoland sequencing comands and parameters would do the deefmd though.