Drones | How do they work?

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  • เผยแพร่เมื่อ 2 พ.ค. 2024
  • Drones have evolved over the years and become perfect flying machines. Why are drones designed the way they are today? Why are they so efficient at moving so swiftly? In this video, we’ll learn about the drone’s mechanical design aspects, along with its electronics controller, sensors, intelligent algorithms, and even satellite technology. So, let’s start a design journey starting with a permitted drone and moving on to the most modern drone.
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    Voice over artist : www.fiverr.com/voiceonthemove

ความคิดเห็น • 692

  • @ruchiradesilva7798
    @ruchiradesilva7798 2 ปีที่แล้ว +607

    If I saw this video 1year ago, my life would have been so much easier. For my bachelors degree final year project, I had to learn these scenarios to get the knowledge for weeks. This 10 minutes is way more valuable than hundreds of rubbish research papers.

    • @carlospennav
      @carlospennav 2 ปีที่แล้ว +10

      Damn…F

    • @iitmeans-life6657
      @iitmeans-life6657 2 ปีที่แล้ว

      I want to talk to you bhaiya.... please give me your email or whatsapp...

    • @krypton6293
      @krypton6293 2 ปีที่แล้ว +39

      Well those research papers ain't actually rubbish, but yeah, this video would have been a cherry on top

    • @agentfifteen
      @agentfifteen 2 ปีที่แล้ว +59

      Yes but what you have to remember is that this video was made using those research papers.

    • @vaibhavrai4140
      @vaibhavrai4140 2 ปีที่แล้ว +6

      @@agentfifteen exactly

  • @sweetcollegegirl960
    @sweetcollegegirl960 2 ปีที่แล้ว +166

    The only class I learnt in this year

    • @SomethingaboutScreens
      @SomethingaboutScreens 2 ปีที่แล้ว +3

      Lol!

    • @jellyfish133
      @jellyfish133 2 ปีที่แล้ว +1

      true

    • @quazdecuz
      @quazdecuz 2 ปีที่แล้ว +1

      😂😂

    • @getnetreda676
      @getnetreda676 2 ปีที่แล้ว

      Hydrogen Fuel cell,Zero carbon Future,

    • @TomeSouza-dk7xj
      @TomeSouza-dk7xj หลายเดือนก่อน

      The only class l learnt in this year bom is ers at que this de is ofrs bohs cogch ais que to in the me por just froms terms os uon level los be fom is son aucha you year out 5:13

  • @DivyanshMMMUT
    @DivyanshMMMUT 2 ปีที่แล้ว +278

    Can we get a video explaining how does an electronic Gyroscope, Barometer work? As you explained the Accelerometer...

    • @scarlet0017
      @scarlet0017 2 ปีที่แล้ว +11

      how about how they make sensors work that possess sense ability of environment, from the scrap resource of earth

    • @rajendrakandel4458
      @rajendrakandel4458 2 ปีที่แล้ว +2

      Thank you so much

    • @scarlet0017
      @scarlet0017 2 ปีที่แล้ว +2

      @@rajendrakandel4458 welcome

    • @slimeyyy4019
      @slimeyyy4019 2 ปีที่แล้ว +1

      Yes i also wanna know something about it :)

    • @sjcaljames
      @sjcaljames 2 ปีที่แล้ว +1

      Me like drones

  • @borisdorofeev5602
    @borisdorofeev5602 2 ปีที่แล้ว +48

    This is probably the greatest and my most favorite channel on TH-cam. Please never stop making these videos. As soon as a get my degree ill become a top tier donor in any way possible.
    Really, the amount of knowledge I've acquired through this channel is unbelievable. Thank you so much!

  • @PrashantSharma-ql4yb
    @PrashantSharma-ql4yb 2 ปีที่แล้ว +80

    This is absolutely awesome. Kudos to the Lesics team for putting this together.

  • @glimpseofcambodia
    @glimpseofcambodia 2 ปีที่แล้ว +4

    That’s so thoroughly!!!
    I just bought a KF102 drone and it is so enjoyable to control.
    So impressive that those 4 fans can lift the drone easily, the air they produce for lifting up the drone is really strong

  • @scheimong
    @scheimong 2 ปีที่แล้ว +171

    I've accidentally flown my Mavic 2 into different things several times now. Two times trees, one time a building, and one time myself... Each time it managed to surprise me by somehow auto-stabilising instead of falling out of the air, all while sustaining only unexpectedly minor damage. There's even a video by Destin of Smarter Every Day in which he flew his Mavic Air 2 into a pole, causing a front arm to fold in halfway, and yet it still managed to stay in the air. As a software engineer I was quite amazed when I watched Destin flick the folded front arm back to its extended position while the drone was still in flight. It's very reassuring, seeing that my drone (or at least, a drone with similar capabilities to mine) is able to handle much rougher treatment without any problems.

    • @scheimong
      @scheimong 2 ปีที่แล้ว +3

      @Javier Solis Well, seems like TH-cam didn't like me posting links. It's Smarter Every Day 245.
      Also on second look it seems like it's the Mini 2 not the Mavic Air 2. Doesn't change anything about it though.

    • @edwardspencer9397
      @edwardspencer9397 2 ปีที่แล้ว

      As long as you can code, things are taken care of. This is the most basic thing we can expect in engineering these days that any bad incident will be taken care of by the algorithm. Just like the airbags that get deployed on an event of a car crash. It depends on the speed of the processor and signal. And thankfully devices today are really fast to detect split second collisions.

    • @coolbluefoxeverything
      @coolbluefoxeverything 2 ปีที่แล้ว

      I same with me but with no pole hitting and mavic mini

    • @VishnuPradeep
      @VishnuPradeep 2 ปีที่แล้ว

      @@scheimong Thanks for sharing that info.

    • @michaelhertz8717
      @michaelhertz8717 2 ปีที่แล้ว +1

      @@edwardspencer9397 except when airbags were introduced they weretriggered by force from the impact and then a chemical reaction. There was no electronics involved. The process was entirely mechanical.

  • @harinarayanan4079
    @harinarayanan4079 2 ปีที่แล้ว +8

    A kind suggestion,please do enable captions for better understanding of the terminology that has been used in the video
    thank you

  • @pranavramnedi9821
    @pranavramnedi9821 2 ปีที่แล้ว +5

    This is one of the Best explained videos I've ever watched. Thanks a ton Lesics.

  • @001abhaykumarmaurya6
    @001abhaykumarmaurya6 2 ปีที่แล้ว +27

    Great piece of work.👍
    A perfect infusion of animation and information.❤️

  • @user-wo3tf3iu9k
    @user-wo3tf3iu9k ปีที่แล้ว +5

    Thank you.
    This is one of the best explanation clips I have seen in my life ‏

  • @DroneOver...
    @DroneOver... ปีที่แล้ว +9

    Makes you appreciate the technology in our drones even more. Cant believe all that tech inside my dji mini se

  • @dennism.irungu5352
    @dennism.irungu5352 ปีที่แล้ว +1

    What a nice explanation. I have really enjoyed the video. I'll be following this channel for more, since I believe that this is exactly what you offer

  • @fireaspectgaming8601
    @fireaspectgaming8601 2 ปีที่แล้ว +1

    The Most Knowledgeable Video! Thank You For Your Effort And Hard Work

  • @murjoshua
    @murjoshua 2 ปีที่แล้ว +11

    No doubts, this video is very informative! Thanks alot!
    Also it will be great to discuss about the air density and altitude density as well as the temperature and how they affect an aircraft's flight.

  • @everytomday
    @everytomday 2 ปีที่แล้ว +5

    This is great info for getting into FPV drones. I hope to build one soon. Thanks!

  • @joshuaw7364
    @joshuaw7364 2 ปีที่แล้ว +4

    These videos are very well done. great and accurate visualizations

  • @ljre3397
    @ljre3397 2 ปีที่แล้ว +5

    This was incredibly interesting. I’m a retired electrical engineer and like to keep up. Fascinating. Thanks.

  • @yogeshmalik672
    @yogeshmalik672 2 ปีที่แล้ว +50

    ● Unexpected or Deep explanation with
    3D animation. Love it! ❤️
    ● Really helpful for understanding much
    about drones. 😊👩‍🎓
    ● Nice combination of Pretty Voice and
    Animation. 👌
    ● Excellent! 🙌🙌

    • @shyamb9443
      @shyamb9443 2 ปีที่แล้ว +1

      @David OgundepoAs I know, it should be 3Ds Max or Maya

  • @EmreSALIofficial
    @EmreSALIofficial 7 หลายเดือนก่อน +1

    Thank you for your sharing. animations are very well done, understandable and impressive. I would like to thank everyone who contributed.

  • @anishsharma6702
    @anishsharma6702 2 ปีที่แล้ว +2

    Wow , amazing video as its crisp clear with the principle of how a drone works, thks

  • @zusurs
    @zusurs 2 ปีที่แล้ว +13

    The tricopter design shown in this video is from the Latvian company Atlas Dynamics, and it's an industrial/military drone. It's notorious for a long flight time endurance. It's not offered in blue color, though...

  • @kvnptl4400
    @kvnptl4400 2 ปีที่แล้ว +2

    This is video should be there in the curriculum of engineering students, golden information.

  • @user-cz5fz4ig9m
    @user-cz5fz4ig9m 2 ปีที่แล้ว +3

    Drons are the most amazing invention to push up more our technological advancement of this era. May be it is the great invention for right now because it can be use in any field and become versatile day by day.

  • @Itsmeshree99
    @Itsmeshree99 2 ปีที่แล้ว +4

    They're back with amazing content💯💯🔥

  • @rahulkumarbsf
    @rahulkumarbsf 2 ปีที่แล้ว +1

    Your videos can develop interest for engineering in anybody. Great Job 👍❤👏

  • @dogs-and-destruction-channel
    @dogs-and-destruction-channel 2 ปีที่แล้ว +31

    I've got a 4 bladed drone that can run without a controller. Once in the air it's programmed to follow you via a tracker beacon and the on board sensors or an automatic computer program. Although it comes with one anyway so you can do tricks and more complex moves, but other than that it's fully automatic and requires no assistance. I use it for film and checking stuff on my farm.

    • @flynntime-bs7194
      @flynntime-bs7194 2 ปีที่แล้ว +3

      yes drones can run autonomously as well, if you code them.

    • @sahilmohite701
      @sahilmohite701 2 ปีที่แล้ว +1

      Can you share what changes you made for that?

    • @dogs-and-destruction-channel
      @dogs-and-destruction-channel 2 ปีที่แล้ว +6

      @@sahilmohite701
      Most of it was stock as it was intended to help farmers check their crops without leaving their house. It pretty simple all you need for a follow me drone is:
      1x tracking sensors and receiver to follow
      1× obstacle avoidance system which requires a sonic sensor, beacons and gps mapping so it remembers what path you took and will follow it again.
      1× self stability sensors for more stable shots.
      You'll also need knowledge in coding to tell the part how to communicate and what actions to do.
      Or if you don't want to go through the hassle and have a bit of dough to spare, you can buy drones that comes with all this fresh from the box. I hope this help you with your next project, good luck👍.

    • @ats-3693
      @ats-3693 ปีที่แล้ว +2

      I work for a company that has spent the last 5 years developing fully autonomous single rotor helicopter uavs for low level geophysical survey, we only use RC control for takeoff and landing, after takeoff all control is handed over to the autopilot and the 2.4GHz RC is switched off, UAV telemetry is monitored through a 400MHz long range data link which is also used to command the UAV to return home, we can also make it hold while we upload a new or adjusted mission and even fly it in manual RC mode using the telemetry data on the ground control station screen, although this would only be done in an emergency situation. Our UAVs fly low level terrain following beyond visual line of sight for up to 2hrs sometimes around 10 miles from base.
      We also have a fixed wing vtol uav for photogrammetry that is 100% autonomous, it takes off flys a mission then returns home and lands by itself, it sits standing vertically on its tail on the ground and takes off like a twin rotor multicopter then pitches forwards and transitions into a twin prop fixed wing to fly the mission, when it comes home it circle's above home and pitches nose up until it stalls and transitions back into a multicopter then descends and lands on its tail.

    • @dogs-and-destruction-channel
      @dogs-and-destruction-channel ปีที่แล้ว

      @@ats-3693
      I've heard of those self driving drones, alot of farms around here have upgraded to this system for crop dusting, bird scaring, monitoring and more, it's even used by our fire crew to check for bush fires in the mountains. My design was based on a very basic version of this for the gps tracking. That's so cool to hear someone else who has experience in building drones.

  • @nebster333
    @nebster333 2 ปีที่แล้ว

    This is such a great explanation! Thank you so much

  • @ahmadmelhem8625
    @ahmadmelhem8625 2 ปีที่แล้ว

    i really love your videos they are so easy to understand and contain thr necessary details helpful for our knowledge keep on working❤

  • @saipuvvala2137
    @saipuvvala2137 2 ปีที่แล้ว

    Perfect explanation with animations.thank you very much for your information.

  • @styrishrodrigues
    @styrishrodrigues 2 ปีที่แล้ว +31

    Awesome bro.. Really great animations and knowledge.. Loved it 😍😍❤️

  • @oenhauw1814
    @oenhauw1814 2 ปีที่แล้ว

    Super informative with detail knowledge , priceless 👍🏻

  • @sephiroth0733
    @sephiroth0733 ปีที่แล้ว +2

    A detailed and excellent explaination of the DRONE

  • @MrBumbo90
    @MrBumbo90 2 ปีที่แล้ว +1

    This channel is a gem. Thank you!

  • @Concordedeyoutube
    @Concordedeyoutube หลายเดือนก่อน

    You just saved me 3 month all the book and school would take me at least 3 month if not more so thanks dude

  • @lakshminarayana9638
    @lakshminarayana9638 2 ปีที่แล้ว +3

    It's showing only one like button ,but I loved this a lot🤗😊

  • @pierresakr1811
    @pierresakr1811 2 ปีที่แล้ว +1

    Well Presented & Explained , Thank You

  • @daviebutao6306
    @daviebutao6306 8 หลายเดือนก่อน

    well explained 🔥

  • @ikmax2415
    @ikmax2415 2 ปีที่แล้ว +3

    Perfectly Explained!!! Keep it up Team :)

  • @ankitmeena6842
    @ankitmeena6842 2 ปีที่แล้ว +2

    Concise and beautiful explanation

  • @LiamApilado
    @LiamApilado 2 ปีที่แล้ว +103

    To think someone is smart enough to make computer parts like this😱🤯

    • @labscience8271
      @labscience8271 2 ปีที่แล้ว +27

      It's not someone. It's a collaboration between millions of people who worked together somehow through the ages to reach this point. Even Pythagoras and others have worked on this if you think about it...

    • @vivekjaiswar6825
      @vivekjaiswar6825 2 ปีที่แล้ว +3

      @LABscience This literally inspires me to contribute something to earth before i die. Such brilliant minds!

    • @markkupanu8456
      @markkupanu8456 2 ปีที่แล้ว

      ​@@labscience8271 First of all, thanks to Nikolai Tesla ... Now you have Tesla cars that can press the accelerator pedal to work. Soon drones will be in the sky to see your city

    • @labscience8271
      @labscience8271 2 ปีที่แล้ว

      @David Ogundepo Late reply, but thank you, sir!

    • @labscience8271
      @labscience8271 2 ปีที่แล้ว +1

      @@vivekjaiswar6825 I always think about that too. I don't want to leave earth before I develop something for humanity.
      Glad that inspired you. If the world thought the same way, it would be positively much different...

  • @SolarMicrogrid
    @SolarMicrogrid ปีที่แล้ว

    Excellent explanation.to.bringnunderstanding of Arial dynamic s that can be applied to design models to add additional sensor application band how weight may effect lift.wonderful indeed from a engineering perspective. Which I enjoyed learning.

  • @Neil_123
    @Neil_123 2 ปีที่แล้ว +1

    WOW!Great Information about the Drone.

  • @thariqulabrar318
    @thariqulabrar318 2 ปีที่แล้ว +4

    Excellent video! Similarly make video about self balancing two-wheel robots like the ascento 2.

  • @pianobunzz6514
    @pianobunzz6514 4 หลายเดือนก่อน

    This is the amazing video that explaining very clear. It's more worth watching this 10 minutes than listening my prof 2 hrs.

  • @Marks_Vlogs
    @Marks_Vlogs 9 หลายเดือนก่อน +1

    i love this video thank you its so informative

  • @deepakkarthikeyan4558
    @deepakkarthikeyan4558 ปีที่แล้ว +1

    Very great content I thank the people who made this video very much. Great work.

  • @shoaibrafiq42
    @shoaibrafiq42 2 ปีที่แล้ว +39

    One correction, barely any drone uses Li Ion batteries, they use Lipo these days for higher discharge capacity.

    • @sparkly3989
      @sparkly3989 2 ปีที่แล้ว

      Higher discharge or lower discharge?

    • @shoaibrafiq42
      @shoaibrafiq42 2 ปีที่แล้ว

      @@sparkly3989 Higher discharge rate i mean, ofcourse li-ion can be discharged to lower voltages than lipo but the discharge rate is substantially lower.

    • @thexht7927
      @thexht7927 2 ปีที่แล้ว

      Still don't know why they don't use LiFePO4 which is much higher discharge rate, higher capacitance density, higher operating temp range than LiPo. I guess the reason is cost for this battery and to make new circuitry for charging, discharging

    • @sparkly3989
      @sparkly3989 2 ปีที่แล้ว

      @@thexht7927 Nano carbon batteries also can be used tho

    • @theremyyoutube5431
      @theremyyoutube5431 2 ปีที่แล้ว

      or even LiFe.

  • @SG_Arthurs.0489
    @SG_Arthurs.0489 2 ปีที่แล้ว

    I'm Proud That I've An Access Here from Bangladesh... ✍️🇧🇩

  • @suryo_utomo
    @suryo_utomo 2 ปีที่แล้ว +2

    Very comprehensive breakdown 😀👍

  • @anonimkid5311
    @anonimkid5311 2 ปีที่แล้ว

    thank you for making this video, i was really curious how a drone can yaw and couldn't figure out how it spins, now i know😃

  • @TechStudios
    @TechStudios ปีที่แล้ว

    This is the best video… So simple explanation…

  • @AMurmu-hd9dr
    @AMurmu-hd9dr 2 ปีที่แล้ว +2

    I always love your videos
    Its knowledgeable...

  • @dewiz9596
    @dewiz9596 2 ปีที่แล้ว +10

    Excellent explanation!

    • @ikmax2415
      @ikmax2415 2 ปีที่แล้ว

      Indeed!!! 🙌💯

  • @brightkittylabs
    @brightkittylabs 2 ปีที่แล้ว +2

    extremely great content love it ❤

  • @john20johnny
    @john20johnny 2 ปีที่แล้ว +1

    Thank you, it is very informative.

  • @stevenkaman-guitarist3434
    @stevenkaman-guitarist3434 2 ปีที่แล้ว +1

    Thank you! Very Informative! 👍❤🇵🇬

  • @mechanical_engineering_passion
    @mechanical_engineering_passion ปีที่แล้ว

    Excellent
    Just outstanding 👌
    How easy you make us understand!
    Thanks a lot 😊

  • @srinivasancheenu1908
    @srinivasancheenu1908 2 ปีที่แล้ว

    Loved it..a clear explanation...

  • @rexelsantua7969
    @rexelsantua7969 2 ปีที่แล้ว +1

    very detailed and imformative thumbs up

  • @gollavijaykumar2190
    @gollavijaykumar2190 9 หลายเดือนก่อน

    THANK YOU SO MUCH FOR EXPLAINING

  • @thenoisyworld5856
    @thenoisyworld5856 2 ปีที่แล้ว +1

    Terrific

  • @Sayedimg
    @Sayedimg 2 ปีที่แล้ว +1

    Thank you for this cool stuff!!

  • @Tamer_Gomaa
    @Tamer_Gomaa 2 ปีที่แล้ว

    Great detailed explanation, Thanks

  • @maheshmishrainfo
    @maheshmishrainfo 2 ปีที่แล้ว +1

    ❤️❤️ crystal clear

  • @LutherFPV
    @LutherFPV 2 ปีที่แล้ว +7

    Why am I watching this? I'm literally building drones myself lol
    Great video though!

  • @joaquinbracci
    @joaquinbracci 2 หลายเดือนก่อน

    This is just brilliant

  • @krypton6293
    @krypton6293 2 ปีที่แล้ว

    Tanks a lot , brilliant work

  • @Jai_Hind24
    @Jai_Hind24 ปีที่แล้ว

    Excellent video, Bldc motor in drones is a game changer in drine technology.

  • @melvinsharty4417
    @melvinsharty4417 2 ปีที่แล้ว

    Great innovation! Incredible animation.

  • @Aditya-wj5gy
    @Aditya-wj5gy 2 ปีที่แล้ว

    highly underrated channel. This is engineer's paradise.

  • @getartsywithyogita8291
    @getartsywithyogita8291 2 ปีที่แล้ว +5

    The ant feels itchy😂!!

    • @pawarnav
      @pawarnav 2 ปีที่แล้ว

      😂😂😂kuch bhi

  • @Hurricane23
    @Hurricane23 10 หลายเดือนก่อน +4

    This is great info. I'm a DJI employees
    and find this very helpful keep up the great work!

  • @SUYASHSONOPANTPATILSVNIT
    @SUYASHSONOPANTPATILSVNIT วันที่ผ่านมา

    GREAT EXPLAINATION

  • @avtarsingh345
    @avtarsingh345 2 ปีที่แล้ว

    Thank you so much to create this wonderful video

  • @ev4657
    @ev4657 3 หลายเดือนก่อน

    This was so cool! Thank you

  • @kamimuras.9209
    @kamimuras.9209 2 ปีที่แล้ว +1

    Brilliant as usual

  • @dy7296
    @dy7296 2 ปีที่แล้ว +25

    1:12
    For some reason, this part killed me XD

  • @LifeGeneralist
    @LifeGeneralist 2 ปีที่แล้ว +2

    Excellent video

  • @hcic8738
    @hcic8738 2 ปีที่แล้ว

    Excellent description all around....

  • @hashensenevirathna1245
    @hashensenevirathna1245 9 หลายเดือนก่อน

    Really interesting topic. Thanks

  • @pourkin
    @pourkin 2 ปีที่แล้ว

    nice detailed description. Thanks

  • @germanvtg
    @germanvtg 2 ปีที่แล้ว +6

    Kalmam filter is used to sensor fusion not to control the system. In order to control the stability you can use classic PID controllers, Space state controllers or lyapunov.

  • @2bsure
    @2bsure 2 ปีที่แล้ว

    An excellent informative video. Made me appreciate my drones so much more.

    • @shiekhfahim6787
      @shiekhfahim6787 2 ปีที่แล้ว

      how much does it cost to build our own drone.???

  • @nateshrager512
    @nateshrager512 2 ปีที่แล้ว +14

    If you really want to understand how the flight controller makes its decisions about where to go, I believe this is almost always accomplished via lagrangian mechanics.

    • @munumun
      @munumun 2 ปีที่แล้ว +2

      there are opensource autopilots like ardupilot or pixhawk.

  • @keisuketakahashi3597
    @keisuketakahashi3597 2 ปีที่แล้ว +1

    This is exactly why I subscribed

  • @prithvirajmahto3867
    @prithvirajmahto3867 2 ปีที่แล้ว

    This is best channel on internet ❤️❤️❤️❤️❤️❤️❤️❤️❤️

  • @imransheikh5505
    @imransheikh5505 2 ปีที่แล้ว +2

    Welldone highly informative video .

  • @whityguy9570
    @whityguy9570 2 ปีที่แล้ว

    I love this channel because I learn a lot from this channel 😎

  • @nakularl6735
    @nakularl6735 2 ปีที่แล้ว

    So nicely explained!

  • @eprohoda
    @eprohoda ปีที่แล้ว

    Enjoyed. total excellent uploading~ dude~

  • @mulyadimolsmansa92sumenep
    @mulyadimolsmansa92sumenep 2 ปีที่แล้ว

    senang lihat penjelasannya
    bagus terarah

  • @dido1803
    @dido1803 2 ปีที่แล้ว +3

    Love the content.

  • @ifell3
    @ifell3 2 ปีที่แล้ว +2

    This is great!!

  • @hodophileshubbu01
    @hodophileshubbu01 19 วันที่ผ่านมา

    Soo Informative ❤

  • @ananddassa2017
    @ananddassa2017 2 ปีที่แล้ว

    thank you for the information

  • @siddharthkumar5645
    @siddharthkumar5645 2 ปีที่แล้ว +1

    Outstanding...

  • @TonieSmith
    @TonieSmith 2 ปีที่แล้ว

    Great details and simplified explanation. Thanks for the work that went into consolidating and presenting so much information in a quick, easy format.

  • @garamsamosha9678
    @garamsamosha9678 2 ปีที่แล้ว

    Best 👍 understand the power of engineering

  • @gilbertgrajales2292
    @gilbertgrajales2292 3 หลายเดือนก่อน

    Love this Csi!