I need to force my copter to flight with 20 km/h speed during way-point mission. I planned mission in Mission Planner, created region with poly lines and set “Survey (Grid). I also checked “Use speed for this mission” with 20km/h. I even can see in commands “DO_CHANGE_SPEED” 5.55” but when I take off my copter always fly with speed around 16 km/h.
As I read in wiki I set WPNAV_SPEED to 5,8 m/s as fastest speed of copter in waypoint flight. Copter can fly 40 km/h without problems… in RTL it fly 28 km/h.
That’s big hexacopter 12 kg weight with 18" propellers with Cube Orange
Hi I did same more tests. I think that’s not a problem with configuration of my hexa because when I created simple waypiont mission in Mission Planner (just 2 waypionts and DO_change_speed" command copter did everything correctly. I also checked survey mission in qground controll I can fly in such mission with even 32 km/h no problem…
So that’s a problem with “survey” option in Mission Planner or with Arducopter firmware…or parameters which I don’t know. Mission Planner is creating many waypionts every 10 meters. Maybe copter is slowing down before it reach every waypiont and can’t reach desired speed like 29km/h. Please check this mission form Mission Planner and this from qgoundcontroll. QGC is using much less waypoints…and for taking photos using other command…
The option “survey-grid” in Mission Planner is generally the best. It gives much more possibilities and information than in other Ground Stations. That will be hard to use other software maybe this bug will be repaired ? @Michael_Oborne could you help ?
Hi I updated my copters to 4.3.3 and that problem still exist. In RTL my copters flys ok with high speed what is written in " RTL_SPEED". When I will set the waypoint 50 meters from the copter it will fly to that point ok with the speed from " WPNAV_SPEED". The same everything is ok when I prepare mission in QGroundcontroll it will be flown with the speed from " WPNAV_SPEED". But When I am using Mission Planner with option Auto WP/Survey(Grid) and “DO_CHANGE_SPEED” copters flys always with speeds 10 km/h, even if I delete the “DO_CHANGE_SPEED” ??? What I am doing wrong? Where can I found info how to setup Survey(Grid) flight with desired speed ? That’s general best option to plan photogrammetry flights.