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I think this isn't what you meant, as 3S vs 4S you cannot typically use the same motor/prop, as RPM would be ~25% higher - so would be like trying to pull away in 3rd gear - you can do it, but its not efficient and will not give best service life. 3S packs are nominal 11.1v, 4S are 14.8v so for...

I forgot to say, ALWAYS ALWAYS remove props before calibrating ESCs, also you only need to calibrate ESC's manually for Naza flight controller (as DJI expect you to buy their ESC's which come pre-calibrated 1000-2000), all the other flight controllers I've seen can do this as part of setup, if...

There may be two separate issues here. 1. Throttle calibration, you need to calibrate/recalibrate all ESC's together so they match each other for response ie 1000ms - 2000ms typically - if one ESC is calibrated 1100-2100 or 900-1900 it will not match throttle positions which gives the FC a...

Pretty sure you are limited to 3S with those props/motors, so flight time is a factor of weight/capacity not voltage.

Just listening to podcast on my walk to work, and really enjoyed Petr talking about his adventure in New York Harbour, and the abandoned island - these are the bits of content I really enjoy ! Great job Petr. Would love to see some clips of the videos Petr talks about, the whale...

Pretty sure the Cyscan would break the budget of $400 per quadcopter ;) 3d camera rig is very cheap, you just need 2 or 3 camera's, one on each side of flying area, I'm pretty sure you could get the parts for a system together under $500 all in, but would need a lot of software development to...

OK I'll bite, I'm not aware of any of the shelf quads which can fly in formation, you have to do it the hard way. You would probably do best with something like QX90s, they are <$70 each, and have a decent FC, to get them to fly in formation you will need a 3d camera rig and some custom...

If it yaws on the bench it can only be gyro calibration or interference issue I'd think, I would recalibrate, and maybe try to move away from anything electronic which may be causing interference when calibrating (obviously as far as possible with cables etc). Failing that its possibly a faulty...

Have you checked receiver settings screen on KK2 and set trim or subtrim on tx to center at 0 (1500ms) ? Can you trim the yaw drift out or does it come back over time? Have you run acc calibration recently? Could one of the motors/esc be slowing which would cause the others to compensate and...

Really enjoyed hearing Petr talk about the 3d mapping/modelling, which is fascinating and I am sure will provide huge possibilities in the future.

Short answer is no. No ubec would handle the current. Quite a few 3s esc are being used on 4s with good airflow for cooling so you could Google to check for others using them. Failing that sell them on and buy 4s esc. Sent from my SM-G903F using Tapatalk

Windows 8 or 10 you need to enable unsigned drivers if you google you will find details. Sent from my SM-G903F using Tapatalk

Either iPad Mini or iPad Air would work fine for P3A - for the Air you may want to upgrade the bracket which holds the tablet mount onto the transmitter to the metal/inspire version. You can buy the official DJI part, or get a much cheaper version on ebay, it just screws on instead of the...

I believe there are some cheap Android tablets which work fine with the Phantom 3 Advanced, Shaun Matthews on youtube has good things to say about Lenovo Tab 3 Essential - which I believe are around $100 (under 100 euro's Shaun said in video below), and is 7" which is I think a nice size for...

Picked up my Hero5 today, the linear mode I really like, FOV is slightly smaller than medium but no fisheye, also the stabilisation looks very nice, but hopefully shouldn't be needed for flying, the voice commands work really well, and there are some hidden extra commands coming in new firmware.

Just for balance, there are some great toy drones at low end of market, the Hubsan X5, Cheerson WD-10 to name a couple, but they are small indoor fliers, perfect for learning/practicing controls, and many come with usable low res camera's for fun pictures. The small quads have a huge advantage...

I am late to the party, I'd been only using the Go App with P3p, having seen some scare stories of Litchi, I tried Vertical Studio a couple of months ago, which has visual tracking and a wall feature, and does OK at those, but no other features, and swapping between Go and VS is clunky, also...

I am steering towards the Karma personally, its cheaper and more versatile with the handheld gimbal and Hero5 detachable/usable so you can take the backpack out for a trip and have everything to get varied shots for family videos etc, and the clamshell integrated display/controller sounds like...

On the Naza V2/Lite IIRC you couldn't change RTH height in assistant, however you can set home point 'in the air' to increase RTH height. Say your flying near tree's which are say 30M high, if you hover 15M over safe landing point and set home position (toggle IOC switch 6 times I think?) and...

Spares prices are now up on gopro website. http://shop.gopro.com/EMEA/mounts-accessories/#prefn1=compatibility&prefv1=Karma Battery is £89 so a fair bit cheaper than Phantom, however its a 4S 5100mah and only 20 mins which seems less efficient than Phantom capacity/flight time ? Spare set of...