Rocket guidance and flight trajectory control

[@BPSspace]

Wildly cool, great work!!

[@AKDayzplays]

i remember you seeing this

[@kavitanjalicba]

Big fan sir ❤

[@tonysworksMGB]

Your just going to let em show you up like that?

[@mdhasiburrahman8806]

Can't believe BPS space is actually commenting in here

[@traxonja]

Roses are red, violets are blue... 😂

[@nukegamez8686]

Everybody gangsta until he inserts a payload inside it

[@haydentravis3348]

Were the engines full throttle?

[@josephastier7421]

@@haydentravis3348Those looked like demonstration engines only. You wouldn't want to try a maximum performance flight until characterization testing was completed.

[@long_chin_man]

it will suddenly know where it is. because ultimately, it knows where it isnt.

[@mymentymen8185]

Damn did you guys really basically build a missile from scratch by yourself? That is insane. It also looks really slick the flight looked very smooth. Very impressive. Can't imagine the amount of work that went into it.

[@corruptedmineral]

American DIY content be like

[@ghostraptor2068]

@@corruptedmineral 'murica!

[@AssassinGT]

@@corruptedmineral Hate to break it to you but, this takes place in china. You can see at the end of the video it even states NUAA. stands for "Nanjing University of Aeronautics and Astronautics" most of the development software was in Mandarin as well.

[@daomingjin]

@@AssassinGT most places in china have absolutely banned drone flights of any kind. They're afraid of "the people". Imagine if chinese have access to 3d printers and a chemistry lab? Yea, they could launch a rocket attack on pretty much any CCP asset.

[@mankihonda983]

I haven't checked the legislation in 15 years but I do remember model rocketry getting a lot of scrutiny in regards to their onboard control systems. They were only allowed very rudimentary controls if you had anything like in this video the feds would have probably locked you up for domestic terrorism and manufacturing guided missiles. Be very careful when even considering making something similar, check your locals laws and such and never assume good faith from law enforcement. Those days are long gone.

[@GuyJustCool]

The idea to stabilize the descent center of lift vs center of mass by jettisoning the bottom stabilizers is amazing, love your project. Its actually first non-sounding (actively stabilized) rocket i see on YT

[@macstrong1284]

Joe Bernard

[@WarDucc]

wait, missiles have a center of lift? i tought they worked with high twr's ? and another question, what if they don't have one? or is it even possible?

[@GermanTopGameTV]

@@WarDucc Anything has a center of lift. It's the point where all integral aerodynamic forces are located. You know, the wing surfaces generate lift and drag - which are nothing but two components of a force vector. These local force vectors can be integrated over the entire craft (as any surface will create some drag, therefor an aerodynamic force) and you will have a vector that has a direction and an origin, and said origin is called the center of lift. Since lift forces are usually orders of magnitude bigger than drag forces (at least for high angle of attack configurations) we call this principle "Center of lift". It plays a crucial role in vehicle stability. A stable system will always try to orient the center of lift behind the center of mass for a moving object. The feathers on an arrow demonstrate that principle very well. You put them on the end to keep the arrows flight path straight. A slight deviation from the straight orientation will increase the angle of attack on the feathers and force the arrow back into a straight flight path. This means a deviation is met with a counteracting force and self balances the object. "Straight as an arrow" comes to mind. If you put the center of mass behind the center of lift, the opposite happens: A small change in angle will, again, create a force on the guiding surfaces of the vehicle. This force, however, is now acting in such a way that itself increases the angle of attack even further. This results in a larger force, finally flipping the vehicle such that the center of lift now is behind the center of mass. The thing about aerodynamics is, that lift and drag are functions of the Reynolds number. Changing flight conditions will result in changing aerodynamic forces. You need to account for all states of flight to ensure your vehicle is stable thoughout. Especially the transsonic regime is acting up, as many properties of airfoils change dramatically in this environment. I somehow doubt that this was a consideration on this project though. To conclude: Jettisoning the lower fins simply removes their aerodynamic forces from the overall integral of all force vectors. If you remove a vector far away from the center, it will effect the resulting position of the center significantly. The rocket basically turns the direction of the arrow mid flight - from having "small feathers" up front and "big feathers" in the back to only having "small feathers" in the front, making it the new rear of the arrow as it inverted.

[@davidlee1770]

@@WarDucc well, rockets have a center of lift and they are essentially oversized missiles. For missiles, center of lift isn't about generating enough lift to take flight, it's about keeping the missile stable during flight. If the center of lift is ahead of the center of mass in the direction the missile is moving, then the missile will attempt to invert itself, since the center of lift always tries to stay behind the center of mass for stability. To counteract that, missiles have fins on the rear that push the center of lift behind. However, when the missile is vertically falling and the parachute is installed on the nose, then the original design is very unideal, as the missile will now try to fall nose first to maintain stability. To counteract this, we need to push the center of lift further up the missile. The team here achieved this by jettisoning the fins, which pushes the center of lift further up so that the missile can fall thruster down.

[@WarDucc]

thanks!@@davidlee1770

[@licao8055]

Nanjing University of Aeronautics and Astronautics, Undergraduate Innovation Lab. This is what the credit says at the end of the videos.

[@salauddintafsir8761]

If you student of that university please contact with me

[@alfatejpblind6498]

Undergrads? These dudes are hardcore

[@shitboxlife]

The quality of craftsmanship in your videos is impressive. Not only are the concepts you are working with at the high end of things people can even understand, you do it with a build quality that matches industry items. Well done and keep it up!

[@qualifiednot]

Ejecting the fins to change the center of pressure is so smart

[@eh6971]

But why not connect them to the fuselage with a thin cable?

[@qualifiednot]

@@eh6971 Are you saying to raise and lower them? that would require some sort of actuator or spring based mechanism to move them, the reaction forces would probably be weird too. ejection is probably the least complex mechanism to remove the fins and make it so the rocket naturally wants to point down after it hits the highest point in its travel.

[@dom_the3166]

@@qualifiednot I think he means using a thin wire to retain them as they eject

[@evanweir169]

What is the purpose of ejecting the fins at the rocket's apogee? You mention changing the COP, but to what end?

[@pipinggpipingg1487]

@@evanweir169 fins causes more drag at the back of the center of the mass thus would make the rocket wanna point towards the ground on the descend so they couldn't use the parachute effectively . Wires on fins could still cause the same effect as fins would float up relative to the rocket on the descend and would still be pulling the bottom of the vechile and force it to point downwards .

[@kekulta]

The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is (whichever is greater), it obtains a difference, or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missile from a position where it is to a position where it isn't, and arriving at a position where it wasn't, it now is. Consequently, the position where it is, is now the position that it wasn't, and it follows that the position that it was, is now the position that it isn't. In the event that the position that it is in is not the position that it wasn't, the system has acquired a variation, the variation being the difference between where the missile is, and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the missile must also know where it was. The missile guidance computer scenario works as follows. Because a variation has modified some of the information the missile has obtained, it is not sure just where it is. However, it is sure where it isn't, within reason, and it knows where it was. It now subtracts where it should be from where it wasn't, or vice-versa, and by differentiating this from the algebraic sum of where it shouldn't be, and where it was, it is able to obtain the deviation and its variation, which is called error.

[@KabelkowyJoe]

If it was that simple "algebraic sum" :) It should use some PID, because relation between how wings are adjusted and how should be set. Depends on various factors like for example speed or size of wings. Greater the speed lower the feedback should be, but not always if it would be too loow - SpaceX lost fuel, could not adjust it's position fast enough and fliped over. To not cause too much correction than necessary causing in consequence loosing it's trajectory in opposite direction - making it even worse. Simple PID should be set, to set P and I and D module properly you have to test it couple times. One to react quickly over-reacting, other integrating change add some "trim" and third simply multiply by some factor I hope you know all of this, just wrote for everyone else - it's not that simple, although more or less, way you described. Perfect algorithm would "learn" during long flight could gather information and subsequently adjust PID parameters to end up with minimal deviation. It's difficult if you deal with rocket.. to learn i hope they continue for example set goal of hiting target like baloon or something in the air :) That would be cool. First baloon with GPS attatched and both connected. Second time only visual. Private defence system :)

[@Flumphinator]

Beat me here.

[@user-gr9un8ni3i]

I knew I'll see this comment

[@emerychandler]

You win the internet

[@Ilya5522]

Classic

[@darielrodriguez6984]

There's still hope for the generations to come. glad to see these awesome geeks kicking the coolness out of measuring levels

[@ege8240]

obviously? new generation is always more advanced with the amount of resources and total knowledge increasing

[@FireFly969]

Yep you are right, there is always a percentage of people who are interested in different things, and the harder things are there will be less people interested in, or specializing in. There is nothing easy to watch TikTok all day, and the hard things, for example learning how to make missiles, drones, planes cars....​@@ege8240

[@parsonsjs]

Incredible control nice work guys ! As someone with a control engineering background this is a very hard project to pull off. Well done

[@Yuralittlebitchn1gga]

ive seen more stable fireworks ]

[@TrungNguyen-mj2id]

With control engineering background, I don't think it looks hard. A simple pid controller should work. The hardest part comes wih trajectory control which in turn boils down to navigation part.

[@mattmurphy7030]

@@TrungNguyen-mj2idas someone with a control engineering background, this is not an easy project to pull off.

[@abdullaal-bader46]

as someone with a control engineering background, this is not an easy project to pull off.

[@plugg1160]

@@TrungNguyen-mj2id as someone with a control engineering background, this is not an easy project to pull off x3.

[@kipchickensout]

That looks really cool, thanks for showing the cad models and the inside as well :)

[@haseebkhawaja1050]

As a mechanical engineer. This really is very impressive...

[@YavuzSelimKpnk]

Tam beklediğim performans. Çok güzel çalışma olmuş. Zekice düşünülmüş bir sistem. Roketin kalkış esnasında yalpalanma olmaması için eksenini düzelten bir kanat sistemi (gyroskop ile ) yapılmış. Cidden çok havalı ve güzel. Tebrik ederim.

[@schiang]

貴團隊對於不同功能模塊所做的驗證是令我最驚豔的部分，就算以業界眼光來看也是做得很完整，可以想見貴團隊系統化設計思維之完善。如果我要指導學生做工程專案，我一定會推薦他們這個影片。

[@Proempireking]

台灣造火箭算了吧,全台頂大加總搞得飛鼠還不如人家一個本科社團的東西有看頭

[@truezyf]

这些人毕业后可是要去造大火箭和军用导弹的。

[@user-ib9ss7hu3y]

​@@Proempireking等你捐款啊～😂😂😂

[@spudeleven5124]

绝对地！ 作为一个英裔美国人，我也会做同样的事情。 做得好！

[@xuandong3610]

这哥们是南航的大一学生，最早视频发bilibili的@@Proempireking

[@micheldriessen5081]

We used to play with rockets 35 years ago. But with what is available now, you have a world of exploration extra. Nice job ! Keep up the fun for the rest of your lifes.

[@flat-earther]

hi micheldriessen, have you become a flat earther yet?

[@SuperGarryGamer]

@@flat-earther meow

[@velocitylaunchsystems]

This is incredible! Insanely impressive work

[@Adam-en4zm]

Very impressive work guys, I'm sure you have a bright future with those kind of skills.

[@ruhruhruhruhruheisjsij]

As in a nuclear bomb flash type of a bright future

[@bun72642]

Your work is amazing , keep it up

[@LEON-zo7ce]

Very very, very impressive ....imagine the hard work and determination needed to create such a project ....

[@EliteWorm]

This is INSANE. Congratulations, guys! Truly impressed.

[@flat-earther]

hi eliteworm, have you become a flat earther yet?

[@silentblackhole]

Everything looks so well made! Awesome work! how long did it take from start to good launch? Did you use any open-source software? In particular for flight control or cad designs?

[@mikethezipper]

Your videos inspire me. Aboslutely amazing work. Im so happy to see you have the resources to execute such a cool project.

[@AhmedAdly11]

Most importantly, it looks like China has made a mechanism that brings creativity into creation.

[@evanweir169]

@@AhmedAdly11 what do you call the mechanism. the one that brings creativity into creation?

[@AhmedAdly11]

@@evanweir169 one good mechanism is supporting students to carry out projects. In Egypt, such a project would be banned on the basis of national security. (it is a 7 year jail for using a drone)

[@kioly_ah]

​@@AhmedAdly11 it's really sad that they kill the people's creativity and productivity.

[@AhmedAdly11]

@@kioly_ah If you come from a free country, you could not imagine. Military dictatorship is a horrible thing. China is lucky in comparison. Also, they went from dark to light! So what we see now should be considered incredible leaps forward. Also that they will continue in that direction.

[@hemlatagautam3831]

Made my Day .... incredible work!

[@habeebabdulfatah4847]

Guys this is so cool. Great job!! I would love to build too.

[@NoahHagen]

I’ve been subbed for a while and wow I can’t believe the progress.

[@eisnarf]

Great project and great video🙌🙌

[@jeisinga]

love the work you did on this rocket

[@TheBeardedEngineer]

Just keeps getting better and better!

[@mrsenator9106]

As an engineer, I salute.

[@rohanbandaru]

My day gets better any time L Shang uploads

[@StalkerFromSouth]

Вот это грандиозная работа, молодцы, лайк

[@skaterfabi11]

great project, what kind of sensor fusion algorithms did you use for the IMU?

[@sajedrezaei5044]

Great work thanks a lot for sharing

[@VisualBasic6]

After watching this video thoroughly on multiple occasions. I can confirm without any doubt that the missile knows where it is at all times. (It knows this because it knows where it isn't.)

[@Adri-242]

Wow really impressive!! Amazing work and skills!

[@cigp]

what software appears at minute 1 ? what are you testing? some sort of IMU ?

[@jmspaceR]

Soo inspiring! Keep up the great work!

[@GarageSteve420]

Beautiful. I think I'm gonna go design something now

[@Pedro.Lustosa]

What a nice engineering project! Great work, guys. Congrats!!!

[@dragosd977]

This is exceptional, great work !

[@mbunds]

I have been wondering, how important is it to place an IMU at the exact center of mass? It looks like most systems keep the chips very close to this center, but a few millimeters off of the center doesn’t affect accuracy in any negative way. Beautiful work on this guidance system!

[@trollmanman5576]

Theres only two thing missing in the rocket, copper and some explosives 😅

[@DandSCreations]

​@@trollmanman5576that's on our channel lol

[@MarksXmanKami]

@@trollmanman5576 just one Copper rod and a cone away from being an ATGM

[@dsdy1205]

If your IMU is mounted with separation from your COM, then it will detect spurious linear accelerations when the vehicle experiences any sort of angular rate or angular acceleration. Provided that this is characterised beforehand and filtered out of the IMU output, there should be no issues.

[@ericon.7015]

Amazing quality!

[@patdowling5]

Fantastic work, 😊 from Ireland 🇮🇪

[@TornadoBox]

This was well shot and produced! Kudos!

[@AhmedAdly11]

Each time I see young people create I feel hope for the world.

[@gybob100]

You better understand what you wish for in the context of geopolitical paradigm

[@AhmedAdly11]

@@gybob100 it is shifting

[@RGCbaseace]

Boss level activated well done

[@jameschen2308]

Damn, this guy is on a list now 😭

[@Ma_X64]

Very cool piece of engineering! So neat and accurate.

[@tld8102]

that’s amazing!

[@chefpatat]

Insane as per usual

[@manuel.camelo]

GLORIOUS AND DIVINE 👁️👃👁️🙏 Teach us your Skills !

[@mattmurphy7030]

Unbelievable work, great job!!

[@Kawka1122]

I like how you guys can build this stuff. In Poland they would hunt down such engineer and prosecute him until he would "shit himself". Great work with sensor fusion algorithm.

[@rickson50]

pretty sure any american who watches this would be put on a special government list too so, not too far off

[@Adam4A4]

AGH robi rakiety głupi mośku.

[@noahw4623]

​@rickson50 Basically, the rule of thumb is to keep it vertical, also no targeting systems. You break those rules, well, that's a felony

[@flow5718]

Join a rocketry club or create a KZbin channel? As long as you have a valid reason the powers that be seem content to leave people alone.

[@SpiraSpiraSpira]

⁠@@noahw4623t is actually perfectly legal to design and build guided rockets in America. We have the 2nd amendment, after all. If they have explosives attached, then it is a little more complicated but still possible. Testing them can become a lot more complicated as there are FAA (surprisingly not ATF) regulations that prevent guided rocket testing without special permission. Guided meaning that it lands in a specific location. It’s a lot easier to design, test and deploy autonomous loitering munitions that do not use rocket motors, like the switchblade drones and the like, these days if you are a budding Tony Stark.

[@aminecraftnerd1920]

My man out here making a guided missile.

[@rickson50]

a missile by definition is guided

[@beanieteamie7435]

Wow! Absolutely incredible work.

[@eham2011]

hello great stability and control can you kindly share which gyro did you use ?

[@Skillot888]

he really said: "i aint spending 500 thousand dollars on an AIM 9L, i guess ill have to make one" lol nice job

[@archdornan4389]

Next step is adding this inertial nav to a model airplane. After that, TERCOM via optics

[@SouthSaharaMedia]

some countries cant pull this off .... but these kids did .

[@lepermunna]

awesome project and so well executed!

[@malickwb3505]

Hey shang it Malick thanks for this little extract,so what are the engineering software did you use?

[@ddegn]

Why do the fins "eject" at 1:16? Great video! Thanks for sharing your work with us.

[@bb-bricks3040]

Pretty sure so that the rocket flies straight down before recovery parachutes deploy

[@ddegn]

@@bb-bricks3040 I think you are correct. I don't understand why they want the rocket traveling straight down. It sure seems like it would be hard to find those fins again. There's probably a good reason for doing it this way, I just don't understand it.

[@bb-bricks3040]

@@ddegn if you can see those fins on the back help control the rocket and the top (or front) part is chamfered for aerodynamics. Because of their 90 degree trapezoidal design as well as the positioning (you don't want control fins on the front of your rocket), they would negatively affect its aerodynamics.

[@ddegn]

@@bb-bricks3040 I can see how ejecting the fins improve aerodynamics, I just think it's an interesting choice to discard the fins. I wonder if the fins are considered disposable. It sure seems like it would be hard to find the fins after each launch. Of course with 3D printing those fins could be replace with very little effort and very little cost. My wondering about the fins shouldn't be taken as criticism of the rocket design. I think the rocket is amazing.

[@lshang882]

Because I want the Rocket to maintain the upward attitude in order to control the trajectory of the decline process, and I will try to use a reverse engine to land in the future.

[@92kosta]

_Hamas joined the chat._

[@dzgaming5785]

Nik lyhoud hhhh

[@skauffman74]

Just when I thought I was an "engineer"; all those young man are TRUE engineers. Probably in a thousand years I will be able to scratch 2% of what they already know... Such a charming thought, isn't it?

[@fpvlive3346]

Does this system use Kalman filter and dead reckoning for position estimation?

[@wulfleyn6498]

Chinese kids having more advanced guidance tech than russian military missiles is pretty funny. Edit: called them korean when they're chinese, bit of an oops.

[@lshang882]

Hey Wulfleyn, appreciate your sense of humor! Just to clarify, the kids in the video are actually from China, not Korea. While their technology might not be on par with military-grade missiles, it's still fascinating to see how far technology has come and how it's accessible to people of all ages. Cheers! 😊

[@wulfleyn6498]

@@lshang882 Oh sorry, still cool though, I have problems with distinguishing languages in general so sorry for that.

[@raydeemed]

​@@wulfleyn6498 can these kids make hypersonic ones ??? Russia has 1 u.s has 0 maybe you need to open your eyes to reality

[@Lukas-dn6wd]

Engineers 1 second after they graduate (they love the military industrial complex)

[@everry3357]

Tbf most cutting edge is in that sector

[@silentblackhole]

Thank you for making this compact. I would have been about to view your skilful work otherwise. Well done on the rocket!

[@TeoMaragakis]

If you were not in a list before, you are now. If I ever become half as good an engineer as you are, I’ll die a happy man.

[@anditoyib_28]

similar to a ballistic missile but a mini version

[@skyguyfpv2399]

Damn, western kids are learning how to twirk and here the Chinese are learning rocket science

[@ignacios3992]

unbelievable, if i would know how to do a guided missile, i would´nt feel safe; but it´s impressive how all you, with things that "anybody can get", have developed that tecnology. congratulations!

[@Hydro2Mech]

That was awesome. Gread job. That was very satisfying to watch :)

[@kfwj001]

下次加个遥控 再让它飞回来。省得去捡它😊😊😊

[@Andrecio64]

The missile knows where it is at all times. It knows this because it knows where it isn't, by subtracting where it is, from where it isn't, or where it isn't, from where it is, whichever is greater, it obtains a difference, or deviation. The guidance sub-system uses deviations to generate corrective commands to drive the missile from a position where it is, to a position where it isn't, and arriving at a position where it wasn't, it now is. Consequently, the position where it is, is now the position that it wasn't, and it follows that the position where it was, is now the position that it isn't. In the event of the position that it is in is not the position that it wasn't, the system has required a variation. The variation being the difference between where the missile is, and where it wasn't. If variation is considered to be a significant factor, it too, may be corrected by the GEA. However, the missile must also know where it was. The missile guidance computance scenario works as follows: Because a variation has modified some of the information the missile has obtained, it is not sure just where it is, however it is sure where it isn't, within reason, and it knows where it was. It now subracts where it should be, from where it wasn't, or vice versa. By differentiating this from the algebraic sum og where it shouldn't be, and where it was. It is able to obtain a deviation, and a variation, which is called "air"

[@nealrcn]

Looking forward to your ATF visit in the near future video.

[@yelectric1893]

Beyond beautiful. Just so , fucking, AMAZINF ! Great job to your team, Godspeed, fucking amazing

[@aerojetrocketdyners-2538]

Homemade HIMARS hahaha

[@History-Remastered]

Ever considered to making this whole project open source? i would like to help with the design but also perhaps scaling it up.

[@lorenzcyber]

i mean id like that too but tbh i feel like such systems most likely fall under multiple countries regulations of weapon systems just like passive radar code and so son with the kraken SDR not sure if Japan has such regulations not to mention the huge amount of risk this would add for terror attacks and other things like assassinations which in japan are pretty on topic rn so i think the release of the code would be more unlikely, although this may be sweet to send the FSB a present from some activists in Russia this would be hecking sick for causing chaos inland russia

[@lorenzcyber]

kzbin.info/www/bejne/mWqXk3SCdsx4hK8 but maybe this would help ya to some extend

[@danielevendrame9350]

I believe this was developed within a University institution and I don't think China has any interests in making such projects open source.

[@ryanchowdhary965]

​@@danielevendrame9350 Hong kong

[@joshuaeah]

It would get beaten the shit up by ITAR

[@2fathomsdeeper]

Did a laser guided model rocket back in the 80's with nowhere near the tech used here. Photodiodes and 741 op amps for the most part. Tube launched and two staged. Could hit within 4 feet of the aim point at 500 yards.

[@area-xw9yb]

yes

[@zesetai21]

I'd love to hear more about this one...

[@EriccoInertialsystem]

so amazing ,you did a good job,and give us a fantastic appreciation !!and i have a question, u did the whole by yourself????so amazing

[@cobrascolar]

Crazy, now add radar and object tracking😶‍🌫

[@youreale]

hahahah the guys is not on missile business..

[@JavierAlbinarrate]

Hamas doesn't even need that...

[@NileGold]

The US goverment wants to know your location

[@Chimes110]

Amazing!

[@burner8126]

WOW! Nice skills dude. Awesome work.

[@EucaBear]

Chinese students: "We developed a missile flight trajectory control system while still at university." U.S. students: "There are 47 genders."

[@NextFuckingLevel]

You kidding?? Those 47 genders could be weaponized as "freedom" bullet

[@writerrhino166]

As somebody who's in "the business" for real, I'm very impressed.

[@amphem]

fantastic work :D I want to be able to build something like this

[@senaajitraghu]

Amazing work dude!!

[@mostfunnestchannel]

How can you just walk around with it at the park without making rocket noises and pretending it is flying???? That was some impressive self control, I would definitely be like "FSHHHHHHHHHHHHHFSHHHHFSHHHH!!!" every time I carried it around. Amazing project I am really impressed! Also if you do ever need someone to follow the rocket around wherever it goes making rocket noises, I am your man.

[@georgemichelakis1202]

Holly sh** this is so freaking cool. What a beauty 😍🥹

[@acolyteaxiom4054]

Very cool! Great job 👏

[@joaoborges4752]

What software is used for Inertial Navigation Test?

[@aaronmarkstaller]

Nice. What program for telemetry and data do you use?

[@safdarhussain9554]

Very good work 👍, I appreciate your

[@davidmcneil2296]

This is incredibly impressive for kids doing this.

[@michaelvernon9459]

Very impressive! Good job

[@stokesseegers5012]

I want to see FPV RC fighter jet races, on a Death Star Trench Run style race track!

[@primenumberbuster404]

I am listening to nobody but subbing to this guy asap!!!!

[@ripper132212]

this looks so beautiful

[@Noureddineghazi]

amazing