Project 250mph Quad Motor RC Car 1st Drive
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- Опубліковано 29 вер 2024
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so much work went into this build, respect! manifesting that you break the record!
yo youtube themselves????
Wooo, cant believe youtube watched my vid!!
And do you play on Xbox
And do you play on Xbox
What the heck😂
This is the content we want to see
Wao
THUMBS UP
Nice
Great
Thumbs
Awesome build! I can't wait to see you break the world record!
Amazing build! Excited to see it break the record. 😎🤙🏽
Best way to tidy up the wires if you don't want to shorten them, is to wind them tightly around a thin screwdriver or allen wrench. Then you pull the screwdriver out and the wires are nicely pig-tailed.
ok
Jai Shree Mahakal Ji 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
Hi Kevin amazing videos good luck with the World Record attempt ..
Wow that is astounding!!!❤ can't wait to see the rest.
Amazing !!good luck and good save that great Car!!!
We need to see this race the project air jet car
plz kev ! let us soon see the world rekord attempt
So i was thinking if you look at some of the worlds fastest cars theyre more shaped like rocket ships. Sure these gt cars are good for racing and do break through wind pretty good but they pick those rocket shapes for a reason so im wondering if that sort of shape would help here as well.
Kev! You need to ditch thoose shoes 😅
Could do with some traction control, that may be what's ripping up the tyres.
Insane!!!😮❤
Hello there, Kevin from Canada. There's an amazing set of helping hands of Amazon that I found from Adam savage tested UA-cam channel video is called the best helping hands ..Lolo hope thy help cheers 🍻
Kev, if you get a good 3d scan of the car I can run some CFD on the design. I think the person who really takes that seriously is going to be the first to 300mph+ (note I am not an aerospace engineer, but I do work for the company that makes the software and i have used it a good bit.)
gonna help ya get kev to see it o7
that does sound like a brilliant plan
Epic
This is a great idea! Kev, if you are reading this, please make the scans public if you decide to scan it. I got a background in aerospace and I would love to run it through CFD, too.
Arerodynamics is very important. Please Kev, read this.
If it didn't break records you can still be proud of it, it's looks absolutely epic!
even in a bag.
If you’re not first might as well be last
It’s in the bag!!!! I have $50k on it!!!
This world used to be a place to learn to suffer, but that has to change. Make this world heaven!
@@whiterabbit9938 lol no
This channel is the ultimate "What would happen if I did this? Let's find out!" RC channel
The definition of f around and find out hahaha
Anyone else read this in kevs voice.
You have a channel?
I've lost track now, has he ever actually broken a record?
Wow mega build Kev amazing good luck for the speed record dude 😮👍👍😃😃😃
This is the content we want to see. A build like this is out of the reach of most of us, so keep up the good work Kev.
I also agree… it also raises the rc standard and sets the bar for what enthusiasts find appealing. Hopefully this does not make previous standards and goals obsolete 🥸 imagine that 🧐
I agree!
I agree
Kev you achieved a power to weight ratio of 2.5 which is insanity in the world of racing and I’m impressed
That is insanity in general. From what i checked on the internet really quickly(take this with a grain of salt), not even rockets or jets have this kind of TWR. Like even Air-to-Air rocket has less(1,2) TWR that this. So i would say that calling it insanity is maybe and understatement.
@@likilike501 actually if built with the right materials missiles and model rockets can have an even better thrust to weight ratio than this car has in power to weight but they’re also free of the ground and slipping through the air, nothing else with a shaft based drivetrain has ever been operated with power to weight this good except maybe a land speed car and even that’s a maybe
@@stevenbryant3055top fuel dragsters have a significantly higher power to weight ratio
@@TheCreamRisesToTheTop actually it’s about on par the engine drivetrain and tires of a top fuel car are surprisingly heavy but it’s also the same situation here although Kev’s car shouldn’t need a rebuild after every single fire up unlike a top fuel car which is a huge upside
Its very good. To put it in perspective, a top fuel dragster has about 3.37 horsepower per pound, using a fuel source thats over 800% more energy dense. This guy did 2.5 in his garage using batteries.
Something too think about is that the farther back you have your center of pressure the more it will want to stay straight, increasing that pressure would be like adding more fins or adding a small wing to the back, or you could try and decrease drag at the front of the car. I hope this can help if you need it, otherwise you can look up some stuff about rocket aerodynamics and how they stay straight.
That's why it's a comments section
❤❤❤
😮😮😅😊
Shifting more weight to the front will help well. The key is having the aerodynamic center of pressure well behind the CG.
@@MX304cg needs to stay in the middle of the wheels. I want a tail as long as the wheelbase!
Even if it didn't break records, you should still be incredibly proud of it. The level of detail and craftsmanship is truly remarkable! It's an absolute masterpiece. 👏🏼🔥👍🏼 Don't let the absence of a record diminish the incredible achievement and effort you've put into this project. It's an epic creation that deserves recognition and admiration. Keep pushing the boundaries of what's possible! 🚀🏎💪🏼
At this point, I think Kev should go for World's Farthest/ Highest Jump..
Build a huge ramp and launch it into orbit
nah, TO THE MOON!!
@@jonshook7407 Talbot Space Program is a go
Hey Kevin, long time watcher here! If you're looking for the PERFECT 'helping hand' get yourself a Mag Base - they're used in machine shops a lot to hold dial indicators. They're easy to manipulate, and the arms lock in place.
I know you probably wont see this, but it would definitely be a great/simple/easy solution!
I think you're talking about a Nogaflex?
As an fpv quad guy, my brain glitched seeing those ESC's. Good god..😮
Never thought I'd see Kevin with xlx2s again after the initial flaws. Good to see he's giving them another go
What flaws? People were mixing and matching thr esc with delta wound motors instead of the wye motors that castle designed their system and motors. This caused a huge amp increase. They released a public notice describing this after everyone tried to burn castle at the stake. This was a common problem back in the early days of brushless so i knew that was the problem right away.
@@mindwreckRC the first initial batch had some issues. busbars were misaligned and if i remember correctly with thermal expansion it created a short inside the esc
I was seriously considering Castle till I saw that vid I am glad he is giving them another go on a big project like this. I really liked the data logging aspect of the ESC I was unaware of the delta, wye configuration issue.
Only one thing kinda concerns me, is that you could get resonance vibration through the chassis, as it looks like it can bend and bounce quite easily. This could cause the wheels to loose grip and decrease stability. Perhaps some aluminum struts through the entire structure from one and to the other to create a more rigid body, might be a good idea. Just a thought mate :)
Would the resonance only happen at a certain range of speeds? Maybe it could be tuned so the worst vibrations happen at lower speeds?
back in the day for on-road 1/10 oval cars, we ran rubber cap tires. it was a foam tire trued way down then a rubber skin glued down over the foam. Like cutting a section of an inner tube and stretching it over the foam. They were very durable and would keep tires from exploding. Also for low drag race cars, we would use some thin delrin material on the bottom of the chassis to keep from damaging the bottom and it's pretty slick so it wouldn't slow the cars down as much as dragging the chassis. Now you could probably use some Star Board.
That rig is absolutely wicked! Great work Kevin! That’s some serious speed!! 😮
Additionally, have you considered using two different Kv motors instead of two of the same? As it stands, the limiting factor for top speed ( assuming you are stable) is when the motor can not put out enough force to accelerate the car any further. This happens because of back-EMF as you get higher in a BLDC motors rev range. The idea here is that you can have two motors together to extend the torque range of your system. In an ideal world the first motor tops out as the second motor nears its peak power.
You'd need a clutch in between the two motors because once the first motor "tops out" the 2nd will be driving it and thereby lose over all speed. Think of a twin engine plane with the port engine going at 10,000 rpm and the starboard engine going 8000 rpm. The plane would run to starboard due to the drag of that motor.
In boats with twin or more engines, they have engine synchros so all engines are turning at the same rpm.
The best bet would be to have a variable rate transmission which allows the engines to spool up to their max rpm and then shift into 2nd to get the higher top speed.
I haven't gotten a straight answer from any engineer on why EVs don't have a 2 step. They draw max current to get the vehicle moving then peak out. You can alleviate this issue with a 2 step.
You would loose some power but so long as the non powered motor is in coast mode it should not waste that much power since the coils are left open / unconnected.
World record or not, it's going to be an epic run...!!!
🔧🚗 To enhance the suspension's effectiveness, consider adding square sections along the chassis to boost its rigidity. This modification can significantly improve performance. Additionally, reducing the frontal area would enhance aerodynamics. Love the exciting progress of this build! Can't wait to see the first drive! 🏎🔩💨
The "MORE POWER" is finally a reality!!!This thing will be scary...Good luck Kevin!!!
WOW! That MUST be it, I am so exited Kev! All the best of luck for the next proper run! 😘😘
Kev, I think that the aerodynamics will be very important at this speed. Would it not be worth having a custom body molded so that there are no joins? I worry that even a tiny amount of irregularity will cause asymmetric forces and boom, it's crash time.
The fact those tiny motors are 25 HP amazes me. Serious build for sure.
They're not 25hp. I don't know where anyone is getting these numbers from. I'd like to know.
@@timramichKev keeps saying it, seems they are OVERLOOKING what makes brushless motors spin faster!!
@borisdaborghadanuff2382 Just the size of all the wiring on these setups is enough to know there isn't 100 HP total. I doubt it's even anywhere near 25 HP total. Probably around 10 HP total.
If your motors are all spinning in the same direction, it will probably twist the car chassis in the opposite direction and put unequal pressure on tires. Loved the video, by the way 👍
exactly this, i wouldn't want the car steering in the wrong direction because of the motor's inertia
Speed record goes up, but Talbot doesn’t back down! So glad that i am watching these videos as they are coming out. Makes me feel successful watching you chase your dreams! ❤
Hi Kevin, new to your channel, I like all the effort you put into your videos, you got an awesome collection 😀👍
Not so long ago RC cars hitting 150MPH was absolutely mental.. now they are going towards 250mph.. Technology is advancing so quickly, and im all for it! 🏎
World record or not this car is epic! Altough, i do think it its is capable of a little 225 here and there. Lets hope!
You really need to sort out the balance of the car though.
But thats where trial and error is for i suppose.
Good luck on the speedruns Kevin!! (Just dont SEND IT TO THE MOON just yet. 😄)
PS : These speedrunning videos really get my hyperactive brain going.. I'm going to build something too. Just a way smaller scale. For the funs.
Setting goals, breaking my own records.
That thing's powerful. I think you can get it if you can find the right road. Good luck Kev
This is a fantastic project Kev. Really looking forward to seeing more of it. if I was doing this, (ha ha yeah right) I'd put some kind of angle section aluminium/carbon fibre on the edge of the chassis to help stiffen it.
I think you may need to put some kind of protector on the bottom. Awesome that Raz is helping, and have you seen that lad who had the jet car last year, his new project? It's awesome.
I wish you wouldn't yell at the audience! Thankfully the content is good enough to ignore it, though 😅.
In all seriousness, this is the kind of content youtube was made for. No wonder the company themselves left a comment. Love stuff like this, instant sub 👍
I really want this to work but 😂with Kev’s trigger happy finger I don’t know how long this beast will survive! Don’t scratch it! ❤
Kevin Talbot has built a great RC car again. I am really surprised every time I watch the video. This is the best video.👍👍👍
I’m absolutely loving this and can’t wait for your WR attempt! I would still run carbon angle down both sides of the chassis, screwed and epoxied, as well as the center brace. It would really suck to break this thing in half after all that work and money. It would also allow much better body mounting down the sides. Without this, even if the chassis didn’t break in half it could still be catastrophic in the middle of a run if the belly was slapping or dragging on the pavement. This is one heavy beast! Very best of luck and Godspeed!
Nice vid,
but Sorry ...100HP of power is a total lie..please be serious with the numbers..
I know pure mechanical output power is not a often used parameter for brushless motors used for rc cars or drones..but 25HP per Motor is simply not possible..that are over 18 kilo watts !! Wtf
Maybe they have 1,8kW per motor or something...so it is 10 times less !!
His ESCs pull 20 amps at 30VDC, which is 600 watts.
You're probably right, those motors are probably 1800 watts max
With a dart, you want all the weight at the front because it’s the inertia of that weight that is moving the dart through the air. Once the dart leaves your hand there are no forces (aside from aerodynamic drag) being applied to the dart, it’s just the momentum of the mass. If that weight is towards the rear and the there is drag at the front, you end up with an inverse pendulum effect, it wants to tumble. With your car, you are constantly adding force and not relying solely on momentum (unlike if you had launched it from a slingshot or hotwheels launcher). In your case you want all the mass out at the extents of the car to create the greatest most stability. If you put all the weight in the center, the car turns very easily, put it all at the front and rear and the momentum of those two masses actually helps to resist the car changing direction, ie it becomes more stable at speed.
This is definitely going to make a good run at the speed record which as I believe now stands at 219mph. I think you have a real shot at it, the HP to weight ratio looks good and aero wise it seems to have handled the 77mph pretty well. Good luck!!
I disagree. He keeps adding more HP but also more weight and more batteries. If the previous car weighed 10 kg with 50 hp this won't be any faster with 100 hp and 19 kg.
Top speed is basically independent from weight. Weight strongly impacts acceleration, not top speed. Top speed is mostly impacted by power output and aerodynamic drag.
@@TranceFur True, but you're talking about inertia and relying on the weight of the vehicle being a part of "moving it forward" but there is a LOT of drag created and power used to keep that weight moving. Not as impactful as aerodynamics, but it's still there AND you have to steer/control it.
I've been thinking since the first video; you should add another body mount cross beam in the middle of the chassis. If you are putting on top longitudinal bracing, I bet you can attach it to that. I could really see that span of body wanting to cave in at speed.
just an idea kev, so that the chassis doesn't sag so much maybe stack the batteries on both ends, and then there won't be as much weight in the middle. it just might save the car whilst driving. also thank you so much for releasing this video, we've been waiting for so long! keep up the good work man!
Yeah but that screws the aero if all the mass is on both ends, best if it is dead centre or 60/40. Also wheel covers would be good
@@hawkiefindlater6451 yeah true
The power of this beast 😮 can't wait to see this thing fly.....or fry 😅 awesome work kev
This is such a good video kev! Love hearing all the potential issues and how you’re going to solve them. Often happens in RC but maybe not 10 solutions back to back like this!
Nice video
This battle for speed in the RC car world right now is fascinating. The clash of high end technology mixed with a "screw it, let's see if this works" mentality is amazing to watch. I wonder how long it will take until someone really takes a solid look at the aero design or they get a new wheel that doesn't disintegrate and has the right friction properties they need.
I agree with how you worded it… We are on the verge of accidentally discovering something completely new.
Kev's biggest issue is he keeps re-using tires after each run. Bugatti ditches the tires after every run because they degrade. They are doing 390 kph in scale, kev is doing 2100 mph. No wonder the tires don't hold up.
I think you should remove the wing if you are worried about flipping over. As it stands because the down force generated from the wing is behind the back wheel it will force the front up as the car gets faster. The reason why full scale race cars have this is because they need to have extra force and thus friction on their driving tires to accelerate out of a corner. Seeing as you are going for a speed record and not an acceleration record, I think this wing will only help the car flip over at speed. The alternative solution is to move the wing over or ideally in front of the rear tires. Regardless, I think it is still important to have the "sides" of the wing because they will help you maintain stability at speed.
Good luck!
rear wing is flat, not making any downforce
Hey Kevin, has anyone thought of using polyurethane cylinders as a spring? I was just thinking back in the day Manitou and Rock Shocks had elastomeric damper systems in their forks (many others actually) and worked pretty well.
You’ve got to bond some square section along the length of the chassis to make it stiff enough for that suspension to actually work .
That frontal area could be reduced a lot. Love this build.
even some lightweight L's along the two sides would work as well.
Squares aren't the best, an I beam or triangular would be stiffer with less weight.
@@muskokamike127
Because you know all those cars with I beam chassis . . . .
I beam is not good for a twisting force, square is better. Sorry but your thinking about building house of skyscrapers not cars.
@@Whateverpoopiepants And you're thinking of a car that will be going around corners. This one won't be.
This is a special purpose vehicle to go straight as fast as possible.
@@muskokamike127
I’m quite familiar with this type of stuff.
What with being an engineer for lotus.
And you’re still wrong, when one wheel sees additional load that is a twisting moment.
Not every bump will be hit with both front or rear wheels at the same time, that’s why you have dampers on every corner. . .
Or trangular. Absolutely. Stress on that centre section will be massive. Next speed build - make it a circular cross section chassis or triangular
Maybe put fenders or inner wheel arches on it so in case the tires blow out they won’t hit the LiPos
MOST AWAITED SPEED CHALLENGE ON UA-cam...LETS GO
23.8 HP continuous / 75.1 HP peak
Assuming those ESC's can put out 150 amps continuous (recommended connector size) and multiplying that by 29.6 volts, we get 4,440 watts or 5.95hp per ESC. That's 23.8hp total, best case scenario and with no efficiency losses.
Castle's logging software shows the XLX2 hitting 500 amps for a couple of seconds with a voltage around 28v, consuming 14,000 watts.
and here I am thinking 50mph is wild 🤣🤣
but seriously, that build looks wicked Kev, wishing all the best in your speed record attempt!
This is a good test in order to determine if with the exception of each motor/esc carrying its own weight, will doubling the power every time also double the speed, but again with the exception of wind resistance, inertia and drag, what is the ratio or formula on how dense the atmosphere becomes in increments of MPH?
You really make working on things look easy! This was definitely a lot of work! Makes me work on things better! I always think to my self when in a jam… what would kev do?…he’d get it done! Good luck! Hope you get the record.
Always nice my brother Kevin..👍👍👍..but black grease is better in increasing speed RC CAR😇😇
Great channel, thanks🌹🌹🌹🙏🙏
AWESOME build! I must admit I was skeptical about the long wheel base, but full credit to you for making it work - very exciting!
Hey Kev, would that centre driveshaft really have much load on it when both front and rear pairs of motors are running? I feel like the length might be fine since there is only minimal "sync" load
For soldering the battery connectors, search your favorite place for soldering pliers. There are many different brands but most all look similar. Maybe with a little modification they could hold the battery connectors for soldering. They are super handy for wire to wire soldering so either way they would be useful.
Coloque 4 hélices e faça um skate flutuando... :)
I'm actually more interested in the amount of HORSEPOWER this beast has in it than i am the speed it might achieve. 💪 AWESOME BUILD MAN!!!
probably the same as a 250cc bike
25hp per wheel, so 25hp, lots of tourque but, kv and cell count dictate the rotational speed of brushless motors, doubling up or QUADING just reduces LOAD, it does not make them SPIN FASTER. They are all the SAME KV!
I wonder how fast this actually goes? ( like with out the scale into it etc)
These are not scale speeds. The cars are going a legit 200+mph.
@@bradley3549 bro that’s 400km/h.. most real life cars can’t even do that, there is no way a bit of plastic that weights max 100kg can go 400km/h, It would turn into a plane lol. I’m sorry but there is no way I can believe that for a second.
This is by far the most exciting build I've seen! Fingers crossed for you Kev!
Gotta get it this time Kev! If you do not you might need six motors LOL!!! You should use that plastic sheet that carpet racers use on the bottom to smooth things out, make it slippery and maybe keep the carbon intact. IDK I have never tried building one of these but super cool!!!
Kev, put a scale under each wheel and set the car 50/50 weight distribution. That will help the handling
no he wants more weight in the front
@@Mafia932z if it's 19 kg if he puts 10 in front and 9 in back that should do it. Remember the front is also going to get a lot of aerodynamic downforce as well.
This is totally badass! I have no other words to express how exciting this is! Good luck Kev!
Awesome build kev. You are differently going to get a good number, great job my brother, I ❤ it...😁💯👍🏿
We really have to appreciate how good this guy is at his job
ok
You need like some 55 pound valve springs from a Predator 212 performance kit as the front springs on that RC car!
Randomly discovered your videos a few weeks ago.. so good.. love your editing style and your personality. Great vids mate!
thanks bro!
@@KevinTalbotTVmy pleasure!
Wow that is awesome, has to be scary as hell to run something like this, genuine road rocket 😮, good luck!
Kevin if you’re going to drill or sand carbon fibre put some water on it because it stops the carbon fibre dust from getting pushed into the air
Hi there buddy just wanted to help you out with regards to a very good soldering hands solution is the Omnifixo of-m4.2 which I was put onto by Joshua bardwell who does the drones as i started flying a few years ago so can definitely recommend this tool , worth a look unless you already have one hope that helps you mate and keep up the stella work take care regards christian ✌
Honestly - it looks good. Have you tried it in a wind tunnel? Tinker with downforce wings. I think a thorough analysis by an engineer would go a long way. Also, full scale LSR cars always spend an enormous amount of time getting the wheels right. There has to be a better alternative than foam. Also do you use a gyro? Great project!
For soldering I use a magnetic clamp for each ends. I work on pickups not RC stuff but it’s worth a try
You can't judge a fish by it's ability to climb a tree,, Classic Kev,,,I hope you get that world record,, keep up the great videos
Holy steamer Kevin lol I haven't checked in for quite a while and, judging by the thumbnail, it appears you've taken this project to the next level and beyond hahaha.
No one can ever accuse you of doing things small!
This should be interesting.
Damn bro I really hope you break the record this is an impressive build and I wish you the best of luck go Kev!!!
Your videos are always fun to watch. Thank you Kevin for uploading and for the entertainment :)
Kev, look into the "Omni Fixo" solder stand.
Seems to be pretty good 👍.
Troy 😎
P.s Cheers 🍻
I don't know if is important things for the record but a car with the only purpose to get 250mph dosen't need steering or suspenction. The only things that are important is the cx, the ratio between weight and power and the wheel grip
Front Diff could be different to give a extra 5% power to the ground maybe?
To get up to that kind of speeds 25-30KG i think would be the ideal weight to keep her down to the ground.
I understand of course the wind / Wing will also push her down.. 250MPH She will be pushing down what 60-70KG?
Thinking you may need tandem rear wheels Front & BACK! To keep them from loosening tracking and exploding the tires.
Also Extra Wheels on the ground will help when hitting Rocks will help with loss of traction
I don't know much, but I do know that you should have reinforcement by each of the motors, and part of or fixed to the chassis.
I've only really dealt with boats and the balance of batteries vs motors and torque twist is critical to stability at high speeds or high acceleration.
For the drive shafts, I thought the drive pins should be oriented 45 degrees to prevent the oscillation that they can develop..
Kevin
Keep up the good work. My son and I love the mixture of material you publish. Keeps it interesting and keeps us laughing.
We do a lot of indoor and outdoor racing so we love the racing episodes.
More 1/8 scale competition racing would be nice especially nitro.
Fans would see what it takes to race nitro.
Genuine question: With all 4 motors spinning the same direction will you get torque roll like airplanes get?
Awesome Build my friend! I thought you was going to smack a curb in that test run lol, but you did great! I cannot wait to see this full speed!! That record is about to get SHATTERED!!
I've been a fan of yours for a long time now Kev, hope u get the world record with this car🤞✊
Measure twice, cut once- ALWAYS
If you are planning on the shafts to wobble then make a holder that has bearings so the shaft can turn freely but be held straight under a massive load
If all the motors are spinning in the same direction won't that create a lot of torque and cause it pull one direction?
You can basically say this is the TESLA ROADSTER 2.0 of rc cars...
You could all do this way easyer, just radio-control your Lambo and boom new record
I never realized this goes faster than real cars and also as fast as some supercars.