The Mavic Air's Special Failsafe RTH
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- Опубликовано: 1 май 2018
- The Mavic Air's Failsafe RTH is different from the Mavic Pro and the Spark.
I'll be showing you the difference on this clip.
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Thank you!
Hey Emanuel. You have done great job. I have an experience more than 300 flight with MA, I just learnt this detail from your video. Your video and the comments clear all everything in my mind about problems of my last 3 flights. For a week i have resarched all the forums but i could not find the answers. I'm grateful to you.
I'm really glad I was of use.
Thanks for your kind comment!
I just purchased a Mavic Air (not yet delivered), so I've been watching a lot of RUclips tips/tricks/tutorials, and this was *extremely* helpful!
I'm glad it helped you.
The first time I tried this I see the drone moving away from me and I thought it was a flyaway.
Was very scary!
If you're looking for gear or a cool case for your Mavic Air I recommend this website:
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Take care.
I also tried it once and got the same creepy feeling: "where is it going to ???"
This video makes once clear what a fantastic piece the MA is.
Thanks for this one !!!
Wow! I will pay attention to my next Mavic Air RTH! Very interesting! 👍
Thank you. Nice video and information
Nice explanation! Very useful thanks.
thanks for the info
Pretty cool , didn't know that. Thanks
I know this is an old video but for anyone that finds this now and just owning a Mavic air (2018) the smart return to home isn't on automatically, if you Don't turn on APAS on the app then it will do the standard failsafe which is finding the quickest straight path back to the home position.
Thank-you very much. Appreciate the information.
great test
Hmm I didn’t know this about the Mavic Air, that explains why my mavic air doesn’t fly back to the home point in a straight line when I hit the RTH, I thought it was flying away but it wasn’t, this video explains why thanks for sharing.
Romeo Fowler this feature is only in failsafe mode. If you hit return to home it should come back in straight line!
@@cesarbonifacio8799 That's been my experience. Thanx for clearing that up.
short addendum: this is only valid for signal loss; if it´s a "battery" rth (or battery alert comes in on "signal loss" rth) it will come straight.
Hope it isn't a prank, because you can't be sure this days. However, if it's true and I believe it is then kudos to you! This is important feature that other reviewers failed to highlight or even notice. Good job!
Thank you Darius.
It isn't a prank! You can check the user manual.
Although please note that the Mavic Air doesn't always trigger this method of RTH when it disconnects, sometimes it flights in a straight line.
I'm guessing it all depends if the "realtime map" created by the sensors indicate an obstable or not.
@@EmanuelPontes1983 I'm thinking it may take a straight line depending on the power left in the battery to get home. If it calculates safe retrace,it will most likely take that option. If it calculates a retrace to home is risky, i believe it's going to come back in a straight line! What do you think?
Did not know that but did experience on long distance flight that it doesn't come back by shortest route and couldn't understand what is happening. I just thought that I didn't pay attention to where I was flying from the start. BTW now I understand why twice it ran out of battery power and I had to go look for it. Thank you for the insight.
It is only applied for couple last seconds of coordinates before the RC is disconneted.
It is not applied for the whole path since the time it took off.
This feature is updated after few recomendations on the dji forum about returning home in the most effiecient way to regain the RC connection on the location where it was last time connected instead of going straight back home.
This is great...unless your battery is about to crap out. That extra time retracing could be the difference between making it back or getting lost. That scenario may not be common, but I've seen it on RUclips. Great content, BTW.... thank you!
is the workaround disabling RTH obstetrical avoidance to make it go home in a straight line? as long as we set the right RTH altitude.
Nice job
Thank you.
Love the intro hahahaha
You turned the controller back on before it landed. Will it land at the dance spot it took off from with without having the remote on?
What happens if you lose signal when its in an autonomous mode like tap fly ? Example when a tap fly sequence starts does the drone keep checking for remote signal input in cycles or something, even though it doesn't need any, unless the pilot hits PAUSE or moves a stick ?
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I've had my Mavic Air a couple of months and I never knew about this RTH feature as I've only switched on the RTH a couple of times. I love this drone so much but it's so easy to fly it out of sight and that makes me very nervous. Its never lost connection with the controller or the video so maybe I worry too much. Nice video and great information, thank you!
Thanks Thomas.
Having a disconection due to range is not as bad as you think as you have indications you're about to disconnect such as laggy video and warnings.
The ones that worry me the most is when you disregard that there's something between you and the drone and all of a sudden the connection drops.
Generally speaking I do trust the RTH. Neither on my Mavic Pro or my Air it let me down once. So far.
@@EmanuelPontes1983
Have you ever experienced that the GPS signal dropped to 7 satellites or less? When this happens, the RTH doesn't function anymore...
I noticed that this drop in GPS signal is often occurring in plain field without any obstructions whatsoever. The signal can go from 14 to 7 at once. This makes the Magic Air very unreliable to fly.
@@MrAntongm I never noticed such a thing on my unit. It has been reliable for as long as I have it.
Do you have any skin on it? I've heard it can be impactful on GPS signal.
@@EmanuelPontes1983
I have no skin on it and it has never crash landed. I take good care of my drone. I don't understand it either, but it is always an unpleasant surprise when it happens, especially when you are flying on the range limits of the drone.
In fact the manual states that the loss of controller signal will result in only 60 seconds of retraced flight. Followed by a straight path to home. So take care with setting the correct return altitude
Ian Authbert why would anyone not set 400 feet for RTH? Just under the max so you have the best chance to clear any unforeseen obstacles?
Andrew because flying up to 400 feet uses battery power and if it’s low on battery that’s (arguably) wasted unnecessary power consumption. I realise some may disagree, but that’s the answer to your question - pilots choice ultimately to try anticipate what will be required.
After the Mavic Air goes up to 400 feet, it would also uses battery power to fly down to land from the added height.
I tested today de vertical retrace:
Test 1: 50m climbing to 80m signal lost retrace at 80m (no descent)
Test 2 : 70m descending to 35m signal lost, climb to 45m(rth altitude) retrace climbing to 70m.
Test 3 : 30m climbing to 83m signal lost retrace at 83m (no descent)
Conclusion the drone retraces the vertical path only climbing.
great review! ... my question is, is this 'special rth' feature happens ONLY when the controller is off? what if im out circle around, and i hit the rth button? would it circle around too before rth? cheers...
question 2 - with your experiment in the video, instead of switching off the controller, and i hit the rth button, would the mavic fly back in a straight line or still follow the path it came from (around the windmill)?
According to the manual this failsafe rth only happens when the drone losses connection to the remote (be it from turning it off, out of range or whatever...)
If you trigger the rth from the button (called smart rth) there is no reference in the manual that it will do this path retrace, therefore i think it will always fly in a straight line.
what if the battery is low? retracing the path will kill it or is this for RC disconnect only?
I just tried. And for some reason I can only get a direct return back. I did a simple zig zag flight. Then turned off the controller. But it simply climbed. Turned. And flew straight back
There has to actually exist obstacles in the way.
The sensors build a 3D map of the area and if it think its safe for a straight return it will do so.
Let me ask. If you are for example at 900m flying back to home point and the radio dies at 500m the failsafe mode will be activated. The mavic will retrace path to 900m and then return to home or it will go back from 500m direct home?
Thanks and congratulations!
It depends.
If it is flying back already in RTH and the radio dies it will continue RTH in a straight line.
If you're flying back manually then there is a chance it will retrace back to 900m (depends if the drone's realtime map created by the sensors thinks there are obstacles in the way or not)
Excellent video and info. What happens to rth when just using the drone alone with gestures and you are now 3 or 4 miles down the trail? Cheers.
@Emanuel Pontes
I know this is an older video but I since I recently picked up a couple of Mavic Air's I am watching more videos about it. I can't help but wonder though if it was in the middle of retracing it's path and the battery level then became only enough for a straight line path to home would it continue to retrace it's path or change direction straight return to home. Would make for a very interesting test!
Pretty sure that once it starts tracing back in FailsafeRTH, nothing but the user regaining control, can change that.
The drone would continue tracing till it reaches homepoint and land, or runs out of juice and falls.
@@EmanuelPontes1983 I don't believe the drone would fall since it's in auto mode, if the battery is below 10% it automatically starts to descent until it lands. It's better to land somewhere closer to you than to fall out of battery, right? The problem would be flying over water.
I had no idea my air could this. Id love to try it, nut too frightened to risk it? I think I prefer the RTC? Return to controller, if I move?
I tried once more to test it vertically, I flew at 77m descending to 45m (above rth altitude) and turned off the radio the drone retraces the path and climbs back to 77m!!!
why you cut the landing time?
Is it wanted like that? If the signal is lost, it may happen that the way back is too long and the battery is not enough! then the Mavic crashes. the direct way is always better, right?
It depends, if you fly behind a tower, the direct way is through the tower. If you're flying at night, for example, where you can't use obstacle avoidance, that means a crash.
I'm guessing that the battery situation is something that is taken into account when the failsafe kicks in.
Emanuel, thank you. Yes, that would be an option. I think it will be like that... ✌️
Emanuel, I have read a lot. When the Air gets the signal in 60 seconds back, the Air stopped and wait ten seconds for new order from the pilot. If there is no new order, the Air flys the direct route home. In case of no signal after 60 seconds, the Copter stop the original way home and change to the directly way. I found it in the manuel, under Return to home modes... 😊✌️
awesome review... question, (just for argument sake), if the drone circles the building 10 times before losing connection, if the the rth kicks in, will it retrace (circle back 10 times) also before returning to home? thank you.. keep up the good reviews Sir! :-)
I know this is an old question but the answer would be no, as that could cause the drone to waste all remaining power then fall out of the sky. if you went around the same building 10 times you would have lost signal 10 ten times anyway.
@@jasondonavich2758 thanx for the reply...cheers!
It possible to turn on 10’times but it with somebody else lol cheers
So, if you fly onder a high bridge at low attitude and lose connection it wil crash in to the bridge in failsave RTH?
From the tests I made it appears that the Failsafe RTH will only trace back the route on the horizontal plane, NOT the vertical plane. It will still climb to the preset altitude.
Using your example, if the preset altitude is higher than the bridge height, then yes, it will hit the bottom of the bridge while climbing to the preset altitude.
Not sure if that is true or not if you have the RTH obstacle sensors turned on. This uses the sensors to avoid obstacles in the RTH mode. Maybe somebody braver than me could try.
It is true.
If during RTH there is an obstacle the drone will stop, fly up untill there is no more obstacle, and then resume RTH.
I might do a video about it.
Emanuel I made a test and the drone climbs to the rth altitude and it retraces back vertically but never below rth altitude it climbs more if the flight was in a descent path!
@@cesarbonifacio8799 It's probably all due to the algorithm DJI has built in. Can't really say for sure what is happening.
Is failsafe actived automatically or do i need to turn it on somewhere ?
It's on by default.
But you can set on the app the default action for signal lost.
@@EmanuelPontes1983 is it i can't RTH by straight line? It have 3 ways, RTH/hovering/landing. It's seems not possible to choise straight or way by path.
@@aidar_almatyyou can only choose the action for sinal loss. You cant choose the type of rth.
can this feature be disabled to have the mavic air return in a straight path?
No. It's in the firmware.
I’m pretty sure the RTH is always a straight path at preset altitude when the controller is connected. The retrace flight path is only when connection is lost. Please feel free to correct me if I’m wrong. It’s a feature I need to investigate
You are correct. That's why I mentioned in the video that this is regarding Failsafe RTH (it's how it is called when the remote disconnects).
I believe it might take the straight path if the battery is low? At least that is a factor in the time to RTH. Another test with low battery could be good.
I just lost my Spark (R.I.P) today as it always takes the straight path and it hit something on the way, so this feature is good. I'd still say keep good line of sight for a straight home path, if ever needed. I know I definitely will going forward with my next drone.
@@nexfilm
what altitude did you set to spark for RTH?
What you said is incorrect. When signal lost, the aircraft will fly backwards for 50m on its original route and then enter straight line RTH
Simples
That's wrong information about RTH of Mavic Air ....
This is really cool but... Keep it out of trees, thin branches make this feature useless. DJI has YET to fix it. shhhh dont tell the DJI fans LOL