Having your RTH set to a height that is not lawful would itself render you just as liable as you would be had you manually breached the 120m barrier. I can see your logic but that is a huge risk to take in London owing to the multitude of aircraft and helicopter activity.
2 Likes
Fair point - but I suppose if you’re regularly surveying 600’ buildings, you’re probably a commercial operator with an Air3s/or maybe in a different category
London is less than 1% percent of the country geographically.
1 Like
I know but it has an airport, heliports and and a police helicopter that actually uses the airspace regularly (and lands) so the airways are fairly busy. There are also tourist flights, news choppers, so I would be very wary of exceeding the 120m limit in London. And my point was that by setting the limit to 250 on the RTH function doesn’t exonerate the flyer from breaching the legal ceiling.
1 Like
Airports! LHR, NHT, LCY , BQH…
2 Likes
So here is an update on the Air 3s C1 class, Just had it out for the first time since the change…
It is 100% now limited to 18.5m/s in sport and the slider only goes to 18.5m/s my video i done the other day showed 27m/s but it reverted to 18.5m/s when trying to slide it (no idea why but that’s now corrected its self and the slider shows 18.5m/s max)
The wind has calmed down a bit now but was gusts up to 20-25mph before and it sill managed to hit that 18.5m/s head on into it.
One thing i noticed (could be placebo most PROBABLY is being me 
) is that in sport it doesn’t seem to climb up the speed as fast as it did “not as responsive” so not sure if they have restricted power? surely not? Please can someone else who has had there’s out since give me a second opinion on this? From some of my previous posts youl probably know i worry and look for faults for no reason at all so its probably just that
The height limit is still 500m with the option and “warning popup” to go to 1000m.
I was out over the Solent last night, I only got 41mph in sports mode.
1 Like
18.5m/s is 41.3mph I think
Did you notice any difference in response?
The drone did seem a little laggy at first but once I was out no big difference bar the speed restriction.
Thats exactly what i meant when i mentioned urban areas.
With these new CAA restrictions both commercial and recreational C0 flights are now problematic at best, impossible at worst.
Jonny roofing surveyor now needs to invest another grand or 2 just to stay in business.
1 Like
Yeah its probably just me as this is what i do worrying about pointless sh*te
If you wanted DJI to change the restrictions, I think the law would have to change.
Obviously, the UK now has absolutely no say whatsoever in the EU legislation setting out the C0 product specifications so there is no way the UK could get the max altitude restriction changed for C0 drones. On this point, we are rule takers, not rule makers. The only thing the CAA could do is reverse the UK legislation recognising C-markings, which I suspect nobody would want (as the Air 3S and, arguably, the Mini 5 Pro would again be relegated to A3 or A2 airspace).
For future models, the CAA could potentially change the UK0 product specification so that, for the max altitude point, it matches the UK1 specification and allows setting a larger maximum height but I suspect the CAA won’t be very highly motivated to do that.
I now have two workrounds to the height conundrum on my Mini 4 Pro; the Drone Tweaks FCC version of the current DJI Fly app, or using Litchi Pilot. Both run on my Samsung tablet, so to test them I found a quarry with a rock outcrop 20m above the TOAL point on the quarry floor. I positioned the drone over the outcrop and increased its height to 140 metres. No problem in either case, as shown below:
Litchi Pilot
FCC DJI Fly:
So for the rare occasions I need to exceed 120 metres above TOP, I have two solutions.
Not tested the max speed of my Air 3S yet, but the new upper limit doesn’t bother me.
1 Like
An average 25-storey UK building is 75 m tall, and an average 50-storey UK building is 150 m tall. Out of the 5 tallest skyscrapers in London, only 4 are taller than 225 m. Setting RTH at 250 m in a city is absolutely reckless and unnecessary.
People doing things like this is precisely one of the reasons DJI is forcing hard limits like this in software on us. 
2 Likes
What are the others?
Totally agree - and based on some of the comments on this thread, I’m a little surprised the GADC committee don’t issue ‘warnings’ to those posting or pushing links to hacks which enable drones to do so. I know of at least one senior CAA guy who regularly reads content on this forum and it ain’t the ‘drone photo of the week’ section!!!
2 Likes
EU & UK Legislation 
CAA Guidance
This belies your assertions about being a responsible pilot and not being a rebel. One must hope that this was merely an idle boast, and that you wouldn’t really have done anything so recklessly senseless.
1 Like
https://greyarro.ws/faq#educate
Have they seen Facebook?
2 Likes
Yep - the guy is in charge of UAS prosecutions.
Anyway, fly sensibly but the guy above who said he has RTH set at 250M in London or Manchester or wants to fly higher to ‘get better photos’ is hopefully in the minority
2 Likes