Does anybody here have experience with using the CSC kill motors in flight (advanced > safety settings set to Any Time) command on an Inspire 2?
I really want to determine the delay between executing the procedure on the remote controller and the motors on the aircraft shutting down. I’ve tried researching the topic across the net and no one seems to have an exact answer with 2 seconds being the best guesstimate.
Other than dressing up an assistant in gloves, face ski mask, and crash helmet with the DJI optional handles on the aircraft frame and doing a trial in an open field; not sure how else I can get the answer. This isn’t a flippant pointless question.
I need to know this information as part of the safety preparations for filming in the Atlantic Ocean in extremely hazardous conditions and not only do I not want to injure or kill someone I want to minimise the risk to losing £15K of gear into Davy Jones’ locker.
As an aside it appears the CSC on the I2 is left stick to the right and down along with pressing and holding the RTH button. But DJI keep monkeying around with the controls on all their firmware updates making the manual useless so if ne1 can corroborate I’d appreciate it.
Finally can ne1 recommend some type of hand held fishing net that could scoop up an I2 out of the air like a large butterfly net before it hits the water in an emergency?
Given that your risk assessment sounds quite an important part of this job, you shouldn’t rely on the internet for your answer, Charles.
Your suggestion is probably the most most trusted way to get the answer you need, and to also ensure you’re comfortable issuing that fatal instruction to your drone.
You won’t need to dress them up though. Just remove the payload, launch the drone, manually lower the landing gear (assuming you have it set to auto-lift on takeoff), then they can safely hold the drone in place while you initiate the emergency CSC.
If memory serves, by default the emergency CSC is set to only work if the flight controller is in error mode. There’s a setting somewhere in the old GO app that you’ll need to change to allow CSC to work at any time.
How far away will you be from the drone?
The Inspire 2 weighs 3.4Kg with NO payload on it, the X5S camera is +460g so you’re looking to catch a 4kg moving target with a net and a pole.
That pole will need to be mighty thick / mighty strong / mighty long to hold 4kg at a distance
Personally, I’d either get insurance and not worry about it, or attach a fishing line before takeoff so you can pull it out of the water if it does go down.
Yes, you have to set the CSC to ‘Anytime’ to be fully under control of the pilot. That much I do know.
I think you may have over simplified the test procedure, During the time interval between the command and the motor killed the aircraft will be attempting to yaw and reverse at full acceleration. You can work out the metres per second and thrust of an I2 at full acceleration over 2 second. That is reason for the protective gear. Ever seen a film producer lose the end of 4 fingers from an I2? Not a pretty sight.
If the switch for CSC is enabled a flight protocol to disable flight in the direction of the sticks is enabled, for safety the aircraft enters a hover, be it for mere seconds. The Inspire will drop as soon as lift is lost long before the motors stop.
The time interval can be demonstrated by hovering a foot off the ground and timing the loss of lift to landing or use Maths which should give an acceptable answer. It’s one of those questions that only you the operator can fully answer to your satisfaction and in a way that can be presented and demonstrated in law.
The laws of probability and physics are against you on this one but would love to be a spectator some way off to witness this amazing recovery.
Njoro
Many thanks for that info. Haven’t seen that info anywhere else about the aircraft going into hover and ignoring the direction of the stick on the CSC command. Makes sense of course but DJI have f’ed around the the way the CSC works on the I2 to the point that no one now trusts it to work properly. Do you know that for certain through experience or through the grapevine?
.The only definite I’ve got is that for hand catching the I2 it’s imperative the controller is in Atti. In P mode the aircraft will fight you the moment it feels the hand pull the aircraft away a miniscule from what the gps sensor is reading. Not the case with the Inspire1.Basically with the I2 it’s a case of Atti and all sensors switched off.
As you suggested earlier I will just have to test it out in a controlled safe open space somewhere.
I stopped updating years ago because of Dji nannying which they still do, there was a YouTube video where someone having fitted a parachute tested both the chute and emergency CSC, going back way back.
