The Drone Thread

digipet

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just close your hdb doors, windows, curtain down and fly your tiny 80mm drone at home. Don't let people know, should be OK.

if someone found out and report to mata, mata comes and knocks at your door, you tell the mata: "no no I never fly, that drone flying sound is from youtube videos, and you cannot come in and search for drones without court warrant".

Later the mata comes again with search warrant, you must quickly move your drone to service balcony and hide beside aircon compressor. Mata seldom goes search there. And even if they find a drone there then you tell them "no no that's not mine, I think blade81 crashed his drone there"....

=> so, You still want to buy a Spark or Mavic?? buy liow very few places to fly...

:D

drone n00b here, so its illegal to fly in hdb area huh? the other time i was shocked when i saw a drone hovering outside my hdb window for a few mins leh (privacy reason).. but how do I know which neighbour flying it?
 

hwzlite

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eh, not comparing their sensor-ed motor with other people's sensor-ed motor lah,...

is comparing "sensor-ed motor" with "sensor-less motor", I'm thinking it might be 50-80% increase in output power with same weight/size. :s12:

hobbyking had been selling "black widow" and "viking" motors with build in ESC. I do not know if it is sensor-ed. All the common drone motors and ESC from market are sensor-less.

;)


AFAIK, there is no other "sensor-ed motor" available for hobby-grade market yet. The "Comparisons > Drone Motor Setups" table there they featured are normal "sensor-less motors" .
 

blade81

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drone n00b here, so its illegal to fly in hdb area huh? the other time i was shocked when i saw a drone hovering outside my hdb window for a few mins leh (privacy reason).. but how do I know which neighbour flying it?
Points at mr quadcopter*
 

Quadcopter

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drone n00b here, so its illegal to fly in hdb area huh? the other time i was shocked when i saw a drone hovering outside my hdb window for a few mins leh (privacy reason).. but how do I know which neighbour flying it?

hmm,.... everything very blur right now, no firm answers, only the authorities know how to interpret the laws. And from my limited knowledge: ;)

can we fly drones at hdb estates?
my ans: I do NOT think there is any law saying you cannot fly drone at hdb estate. But note that more than half of hdb estates are under NFZ, e.g. pasir ris, tampines, bedok, punggol, sengkang, hougang, serangoon, woodlands, sembawang, cck, bt batok, marine parade, yishun, angmokio, jurong west. Those not under NFZ are clementi , jurong east, queenstown, bt merah, kallang, bt panjang, toapayoh.
https://www.caas.gov.sg/public-passengers/unmanned-aircraft-systems/area-limits

can we still fly drones inside own hdb flats, if it is under NFZ?
my ans: I do NOT know, but i do not think that stupid drone laws exclude drone flying inside your own flat.
One guys got too bored waiting for his plane, so drone selfie-ed himself inside the departing room. He got caught with evidence of photo from his facebook and fined HK$50K.
http://www.scmp.com/news/hong-kong/...an-accused-flying-drone-take-photos-hong-kong

can we know which neighbor is flying the drone?
my ans: may be if you could catch and kidnap that drone, you will know when he tries to claim it back from you. In USA, a father was arrested for using a gun to shoot down a drone peeping at his teenage daughter sunbathing. May be after that "rights to forget on google" they will create a "rights to peep" next.
https://www.dailysignal.com/2015/08...spying-on-your-backyard-one-dad-was-arrested/

is current technology making it very easy for peeping?
my ans: no so at today 20 Apr 2018. For low end drones, the drone pilot would be very busy pressurized to keep the drone in air and no time peeping at you. For higher end drones like Spark or Mavic, these drones are very stable in the air so may be peeping is possible.

how i know if a drone is peeping into my apartment?
my ans: Drone technology is still not something you watch in movies where spy satellite's camera could peep into your home and do some facial recognition on you. For higher end drones like Spark or Mavic, they have good 4K camera but still unable to peep into your apartment if the drone is more than 5m away from your windows. Think of the drone camera as your handphone camera, you will have problem peeping into your own apartment if the handphone is more than 5m away from your window. And most drone cameras are too wide angle for peeping purpose. For some sicko to peep into your apartment from a hdb block opposite, I believe they need some binoculars or zooming/telescopic lens, and drones got no such lens yet. But if the drone is flying less than 2m away from your windows, with camera pointing at you for more than 30 sec, you should be quite sure they are peeping at you. Normal drone flyer will not fly a drone that close at <2m to a building, it could get the drone crashed easily.

is there any sicko drone flyers around peeping at people now?
my ans: at today 20 Apr 2018, i do not think so, due to the drones are relatively difficult to control and camera on drones are not that good. But definitely you will find lots and lots of sicko in future when drone technology improves, it will be as many as those upskirt photo taking sickos running wild outside now.

what drone equipment should i buy, if i want to peep into my own hdb, checking if my husband is having fun with my maid?
my ans: I think you need at least a DJI Spark or a Parrot Bebop 2. Lower end drones even like a GPS Hubsan H501S will have problem pointing camera at your window. H501S sometimes cannot lock to GPS properly and circle like housefly around that point. Even if you could get that H501S drone pointing quite stable into your window, the camera is still jump up and down bcoz it is without gimbal.



there are more and more drone laws, and more people are flying drone recklessly. Very soon there will be some accident happening.

I'm forced to flying smaller and smaller drones on this island. I'm flying tello now. :(
 

Quadcopter

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AFAIK, there is no other "sensor-ed motor" available for hobby-grade market yet. The "Comparisons > Drone Motor Setups" table there they featured are normal "sensor-less motors" .

hmm,... from my understanding,

For sensor-less motor, 2 wires are powered at a time, third wire used for sensing the position. hence is like one coil energized at a time.

sensor-ed motor has 3 hall effect position feedback. These are wired separately from the 3 coil wires. So for sensor-ed motor all 3 wires could be powered at a time, and two coils energized. There is extra heating problem here but for drone users they don't care, as peak power is only needed for 1-2 seconds and whole flight is less than 5min.

so i'm thinking power should be increased by at least 50%. May be they are not using the real sensor-ed feedback. Just some slight better positioning but whole structure is very much like sensor-less motor. 5% increase in torque is not that attractive. Sometimes changing a prop also can achieve that.... :(
 

hwzlite

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hwzlite

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hmm,... from my understanding,

For sensor-less motor, 2 wires are powered at a time, third wire used for sensing the position. hence is like one coil energized at a time.

sensor-ed motor has 3 hall effect position feedback. These are wired separately from the 3 coil wires. So for sensor-ed motor all 3 wires could be powered at a time, and two coils energized. There is extra heating problem here but for drone users they don't care, as peak power is only needed for 1-2 seconds and whole flight is less than 5min.

so i'm thinking power should be increased by at least 50%. May be they are not using the real sensor-ed feedback. Just some slight better positioning but whole structure is very much like sensor-less motor. 5% increase in torque is not that attractive. Sometimes changing a prop also can achieve that.... :(

As from my low-ses-diploma-engineering-knowledge-understanding :D ,
if comparing motors with the same Kv rating running under the same voltage, this leave only the deviation factor (plus 4.8% boost in speed/torque for IQ motor) to outshine is the workmanship and material used to build it.

There a good explanation on its sensor at "How does it work?" .

I definitely love the factor of 20% increase battery life for IQ motor.
OSD-control-freak would love its Telemetry capability (voltage, current, RPM)

BTW there were interesting discussing on comments section of https://www.bunniestudios.com/blog/?p=5215 , comparing with Dynamixels robotic-rated smart motor too.
 
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Quadcopter

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someone copied hubsan H502S, but made it optical positioning, no GPS. ~S$80, 1080p, 25min flight time

SHRC.jpg
 

Quadcopter

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5408854088

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DJI Spark worth the buy for starter? is there any local drone community apart from HWZ?
 

blade81

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@swissper: I got my whoop flying now, for normal cruising it is fine, but I realize it don't have that kind of power to recover from a flip or sharp turns.

Wonder if you can recommend me any better 0615 motors. the ones I got are good but not enough oomph
 

hwzlite

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Wow....awesome Freestylers.

Any1 know them and i can't figure out which parts of Singapore they flying?
I only know Malaysia KLCC =:p

 

Swisspers

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@swissper: I got my whoop flying now, for normal cruising it is fine, but I realize it don't have that kind of power to recover from a flip or sharp turns.

Wonder if you can recommend me any better 0615 motors. the ones I got are good but not enough oomph

To improve power delivery, you can use

1. JST-PH 2.0 lipo connector

2. 615 or 617 or 716 motors (depending on your frame).
I have used Racerstar 615 59000rpm/66000rpm, Boldclash 19000kv and Betafpv 615 19500kv, Betafpv 617 25000kv, Betafpv 716 17500kv. You can find them on Carousell or pm me for details. I'm currently using Betafpv motors on all my whoops.

The 617 25000kv really sucks the juice out of the lipo (insane vsag) but the power is crazy. Have to let the motors cool a few minutes in between batts. No problem with acro.
Flight time: ~1.5min

The 615 19500kv is more than adequate for any maneuver. It does get hot as well but not as hot as 617 25000kv
Flight time: 2 to 2.5 min

The 716 17500kv is the most efficient. It barely gets hot and is great for casual flying and exploring.
Flight time: 3 to 3.5 min

The higher kv motors provides much more power but at the cost of flight time.
 

blade81

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I had the 19500kv on my jjrc h36 but i didnt seem much improvement. maybe its limitation to the board that the motors couldnt run at full potential.
i probably take it out and fix onto my whoop see if it improves the performance.or buy the 25000kv because i really like how the high powered quads fly. Not sure if u have flown furibee f36, those are powerful that they can do manual flips and rolls. But even so it couldnt do a powerloop since its stuck in angle mode.
My current frame which is 65mm wheelbase probably wont fit 0716 motors.
 
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