EP 2 - $6000 Carbon Fiber RC CAR Has 4 Motors And 60 Horsepower

[@KevinTalbotTV]

this thing is gonna be crazy!! 203 here we come!!

[@DeRock401]

You better hurry up with that build Kev!!!

[@Andre_Thomasson]

more like 300 lol

[@nickbowker5134]

Shame you got your hands full with your monster truck, would like to have seen a race to the record between both of you

[@1521joe]

you got that shredder ready kev?

[@vincenttuttle3643]

Yeah that race would get crazy views

[@midship_nc]

Thermal expansion on the gears could be a problem, looks like custom one piece pinions joining the two motors on each side would be an alternative. Good work Raz!

[@Mad.Man.Marine]

What form of expansion are you thinking about? Radial? If you mean the width. Then I can’t see why it would ever be a problem. They are spinning the same direction. Now radially. I could maybe see that as a problem. But it could be adjusted out so the tolerance would be right once they are at running temp. Would just be a little loud while warming up the first few runns

[@midship_nc]

@@Mad.Man.Marine axial expansion towards each other, I know for a fact those motors do not use thrust bearings and only have two radial ball bearings on the shaft which cannot handle axial loads. The shafts and the gears will expand with heat. It will at minimum create extra drag and convert wattage into heat. Long term it will ruin the bearings in the motors. To deal with this he could use a captured one piece pinion with needle thrust bearings for each pair of motors that floats on the shafts with no set screws and would allow for expansion. This may seem over engineered but I can't help it, I work with bearing tribology, and industrial rotating equipment reliability every day lol.

[@Simon-jr2oe]

How much would it expand? I don’t rly see it expanding enough to be a problem

[@midship_nc]

@@Simon-jr2oe a rough formula for stainless thermal shaft for growth is length x temperature rise x .0000065(coefficient for stainless shaft growth) 4.5"x140x0.0000065= .004" Then multiply that by 2 because there are two motors end to end which is over .008" 8 thousandths converted to metric is 0.2mm+ and Raz said there was about a third of a mm clearance between the gears at ambient. Include the growth of the pinion gears themselves, or higher temperature and yes it could be contacting and creating an axial load on bearings not designed for such forces. Additionally these are "permanent" lubricated bearings and that oil will be vaporized by the heat and contribute to additional friction and losses.

[@emusp]

The gears will strip 100%. Should at least have used herringbone for lager contact area.

[@rajgill7576]

Im looking at this already and chassis flex will be changing your mesh dynamically. I would say put another carbon plate to stiffen everything above the motors as well, like a brace. It will help immensely

[@bundles1978]

agreed, I also have my doubts that the pinion can take all that torque. otherwise a sick build. cant wait to see it run. better feed power in slow

[@otm646]

You're always going to be fighting flex, he really needs to pause and redesign the motor mount assembly to be monolithic. That's the only way you're going to get the required stiffness out of it..

[@markmmm1737]

Looks good but I have doubts. Those gears will be stripped due to the power and the tiny area of contact. Personally I would turn around the motors and use 2 spools this will give you 4 times the surface area for the pinions and much less stress on the now doubled spool gears. Hope it works out for you, all the best.

[@mixmashandtinker3266]

Or he could make the shaft sprocket wider.

[@nathanwest2304]

realistically we are talking about an RC car here, the tires would spin long before anything would be close to slipping

[@markmmm1737]

@@nathanwest2304 Then you have never seen a stock rc car strip out it spur or pinion gears.

[@nathanwest2304]

@@markmmm1737 steel gears, 5mm engagement on either side, properly meshed, it's gonna be fine "Stock" really doesn't say much, could be plastic or aluminium gears, not meshed correctly, heck, even the wrong type of steel could be reason enough ever see a 4.6 bolt? gonna strip long before it's tight

[@highwaytoquail754]

Would you be able to have 2 motors run the left drivetrain and 2 on right? I don't know hardly anything about electric RC's. I take it with programming, the 2 sides could the trimmed to match power???

[@justinmoore2977]

Really really impressive, I have to think the middle drive gear is going to get beat on pretty badly. Having some form of mechanical slip clutch in that center gear may save it and still transfer the power.

[@watson9897]

That is some gorgeous craftsmanship right there. Absolutely beautiful

[@daddy9bot937]

Man This Monster is gonna be amazing~!

[@henrytang2203]

That's more power than some road cars. I'm genuinely impressed.

[@bigcatdairy]

I like the wall paper, it's gorgeous

[@brandonb.288]

Raz - the machining and workmanship is absolutely top-notch! You are probably learning so much from this type of extreme build that many 'makers' would never get the experience to learn because of the sheer problems surrounding the power transfer alone. That doesn't even account for trying to keep everything inside of the car's footprint and map out where the parts need to go to make it work. Bravo on an amazing build.

[@pipnmaz]

The music at the beginning is awesome and suits the video completely. Celebrate the quadness and the machining of the pinions on some classic machines.

[@blueshiftrobs]

Love it ! Absolutely epic build

[@fuhkoffandie]

driving down the road and never let your eyes off the gears, some priceless video. that editing was gold. oh yeah, I got a question. I know this sounds a bit excessive, but, are you going to clock those motors, so they're exactly in phase, considering that they're hard locked to each other (no clutches, slippers, etc.)?

[@user-TJ365]

Everyone is speculating about what is going to fail in the drivetrain. I am confident Raz will find the weak link on the first outing. Keep pushing the limits, it’s what makes the hobby so much fun.

[@ChiefRickyRC]

Awesome! Better hurry! I'll be hitting 205 next summer 😉

[@blacksheeprc8113]

You have the cleanest builds ever

[@bitemykrank1970]

This must be 60 of those MAGIC Chinese HP's we all hear about ?

[@Ulysees666]

Hi Raz, this is an insane build, loving it so far. Can you get custom pinions with 2 spigots so both facing motors use the same pinion gear, this will guarantee matched timing.

[@gbraadnl]

Right, else there is still some chance to ruin the teeth on each on the motors. With a shared pinion it is less likely to grind off an edge.

[@krisallen6466]

I think it will work the way he has it. Probably easier to match them up individually I’m assuming to get the timing right on the motors rotation

[@gbraadnl]

@@krisallen6466 it will work, no doubt. But it is more about longevity/lasting. This car will likely run at short bursts anyway... 60hp,lots of torque. When it goes wrong it is likely a spectacle :-) Either way it will run.

[@rvzxn._johnbrolls6831]

My name is razin

[@kyledietrich2853]

When talking about gear mesh, there is a small amount of tolerance allowed when setting the motors in place, however there is way less tolerance when attaching two shafts like that. Since they are rotating, any misalignment will cause an insane amount of stress on the components involved and most likely break something or loosen screws at a very fast pace.

[@audiquattrojamie]

Always taking it to the next level Raz, this is awesome! I’m sure this put a smile on your face when everything fitted so neatly, with such fine tolerances 👏👏👏👏

[@robertocastillo6002]

Top noch build as usual, but man, editing is at the same level if not better. The first part of the video and the conversation with the machinist is awesome 😝😝😝, you made my day. Keep pushing Raz!

[@never-stock-rc2968]

Raz this is the best channel on KZbin by far IMO!! and this is the kind of stuff the rc world needs!!! Super EP Raz!!! Keep it up!!

[@keithbranch7718]

Definitely is and the most professional n take the build serious still love watching Kevin channel...

[@never-stock-rc2968]

@@keithbranch7718 right! When I build a rc I honestly try to build them like Raz super clean top quality go fast parts and less is more sometimes. I look at it if I'm going to spend 150 on a semi ok servo why not go all the way in and get the best money can buy even if I have to save up. My k8s exb build is finally done an it sits at about 2100.00 that not including my spektrum dx5r pro 2021 radio..... Waiting for Xmas to drive it for the first time! Cheers!

[@Pablo668]

That was pretty cool. I was a machinist when I was younger, so that's all very familiar to me. Ughughughugh! Looking forward to more of this car. Wonderful parts from Scorched btw. I reckon that you might have problems with that set up, the pinions and shaft gear. Happy to be wrong though.

[@Greywolf74]

This is a really cool build for bragging rights but that thing isnt anywhere near 60HP. At best The quad motors are putting out somewhere between 35-40HP collectively. Thats assuming that each of those 1650kV motors on 8S consumes somewhere in the neighborhood of 6500-7500 watts each. Castle doesn't tell us the wattage ratings on their motors but a Hobbywing 1650kV on 6S is rated at 5700W. The really big TPPower motors can get up to around 9000W each so going somewhere in the middle of that (which I think is being a bit generous) at 7500W is only about 40HP. If you calculate for 7000W each then you end up at about 37.5HP total. Once you start taking other factors in to account like voltage sag, efficiency, etc youre probably looking at something closer to 30HP for all 4 motors combined. Id like to know how you arrived at 60HP.

[@S3irun]

I think he did the following, simple calculation: If 2 motors are rated for 30HP, 4 motors add up to 60HP.

[@Greywolf74]

@@S3irun Yeah but where did the 15HP per motor rating come from? It didnt come from Castle.

[@trevorlaquale6602]

Yeah im trying to picture things ive had with actual 15hp... and i couldn't fathom those tiny ass shafts on the motors standing up to 15hp

[@trevorlaquale6602]

@@Greywolf74 just looked it up, website says can easily reach 10hp range so there not claiming 15 but im shocked

[@Greywolf74]

@@trevorlaquale6602 10HP I think is still a stretch because I dont think thats taking things like efficiency, voltage sag, etc in to consideration but that number is at least in line with the upper end of what my HP calculations came out to based on Wattage approximations. Im curious though where you found the 10HP rating at because Castle doesnt list that info on their webpage, or at least not anywhere on the page that has the motor specs. You got a link to where you found that at? Im betting if you could Dyno a single 1650kV motor on 8S it would only dyno at maybe 6-8HP per motor.

[@MarphyW]

I was excited to see one motor per wheel... This setup doesn't make much sense to me, at least split front and rear wheel traction! :)

[@Planehazza]

I came here for the RC car video, but I can't help but notice how awesome your home is!

[@DreadEnder]

Haha I was going to say you used Kevin Talbots music, then I saw his comment!

[@Ritex223]

Raz, please read this. Coming from a mechanical engineer perspective this construction is destructive, you cannot mount two motors that are connected directly to the same gear (and you are trying to connect 4). You must have some sort of an interface between them. Best case scenario a reverse differential, worse case a torque dampening coupling on every motor shaft. You absolutely must do that because the motors don't turn continuously, the poles of each motor always allign differently, therefore the motors experience torque ripples. In this case the torque ripples are rigidly transmitted to other motors which create motion interference, that's why the car sound bad in your newer videos. Motion interference leads to loss of efficiency and destructive forces on the motor and gearbox. I have experienced this on full size electric vehicles, believe me, this phenomenon can split gearboxes open. As I have mentioned, to avoid destruction and to get better results, you must install a differential or couplings.

[@TheeMissingLinc]

I was gonna say the same, also de-bur the gears after the lathe! It will cause severe mechanical wear

[@orange_tweleve]

Idk why but I always feel like these dudes mechanical knowledge is limited to rc level , and I swear to god you meet the dumbest and uncreative people in this hobby.

[@AutoBodyEverything]

Wow I hope spool don’t explode under load. This is insane!!!! Thanks for sharing all the great content and creative engineering.

[@sh1nan1gan5]

Can't wait for this amazing build to fire up.

[@Captinfun101]

Man you do the most epic builds Raz. I’ve just done my first scorched infraction chassis , Raz carbon shafts , all the other carbon goodies and it’s all thanks to you and some of your tutorials vids. Thanks heaps.

[@stayfunsteven2207]

I haven’t even watched 1/4th of the video but the intro I already love it

[@florianreinfeld640]

I love that Phantasialand-Music👍😂

[@minecrafterfun]

I completely lost it when he started exercising! 😂 This is awesome!

[@MarkSantaMaria]

Sheesh! That thing is nuts! Excited to see it run!

[@midnitejmpr9429]

Ok I was not expecting the way the motors meshed to the drivetrain to be like this….. what an absolute unit

[@dondagy9109]

Your explanations are great. Im not a newbie, but for those that are, you make it about as simple as you can for such a complicated setup.

[@colesteven1123]

Love the silly goose reference I use that all the time raising my 3 boys, as a full time stay home dad

[@podulox]

kzbin.info/www/bejne/f4eWlaGCr9mbeqM lol... (EDIT: Re your name, not your comment...)

[@no-expert]

As a child/teenager I was really into RC cars (still am) and I always dreamt of a custom build like this - thank you for sharing!

[@andyb9994]

I'm probably a little behind on your channel but I will catch up, anyway the car looks very nice, very clean & neat...👍👍

[@ferror4652]

The sound of success! Amazing build

[@fishtailfistscale8362]

The machine shop is always epic. You build awesome toys Mr. Shifrin 🏆🎥🤝🤙

[@ghostly07]

This build is epic! It even has more horsepower than my car!

[@MaxPorsche-ei5jo]

Your pinion is as big as my spurgear . Crazy build.

[@jeremybertrand7931]

I like how your videos are like a motion picture production! Awesome!

[@ruffriki3264]

Yow Raz, really kool shavings! If Saga could see u now!🤣🤣🤣

[@alberthofmann420]

Brutalesch!

[@KiloWattRC]

Did you wake up from a dream one day and say you want a quad motor limitless? Epic build man

[@JacobusRC]

Belongs in one of those museum display cases!!

[@EvanPonton]

Wow, so satisfying to hear the gear mesh. Beautiful work as always Raz!!!

[@emmaff39]

You and that old guy are amazing

[@slyknezz6862]

Can’t wait to see how this turns out!

[@dalaw6600]

I dont even have an RC..... One day...... Butni love watching your builds

[@stephenstoufer3948]

Have you ever thought of turning the motors around and using 2 Pinocchio Spools to run directly to the gearbox

[@paulus842000]

Omg😮😯 those scorched RC parts look absolutely beautiful. I have lots of questions about this already but I don't want to bother you too much with them. This is exciting, can't wait to see the next video. ❤️ Sending you love from France 🇫🇷

[@Shadow-sv9gj]

RAZ YOUR SOO COOL !! YOU SHARE YOUR WORK YOUR ACHIEVEMENTS WITH THE WORLD . YOUR A LEGEND !!!!

[@GulliJ]

Wow ! I think only a genetically modded pilot could handle this car ! Ime a bit worried on the center pinion, this poor guy is arrassed by 4 motors, 4 huge pinions that cover over his own conception, I 5hink the center pinion should be just larger ... To have 100% of contact surface for all 4 motor. Ok...you read it? Now we want to see your next video for sure ! 🤓🤓

[@ametti000]

Twice as much as you need. Power is not the problem. Still amazing

[@stevenrogersfineart4224]

Badass guy right there :) Machining well is definitely a super power!

[@fuhkoffandie]

ahh, carbon fiber, precision cut billet aluminum, 15 horsepower green anodized beasts arranged face to face, yeah I just subbed. I'm in love.💥🤯💥💯💯💯

[@christophberlin2871]

I am more interested in a tour of this gorgeous apartment. Amazing design…oh yeah, good RC work ;)

[@whimsicalcellbooster]

The more the better 🤣 I like this idea.

[@JEEEPEEES]

Mega video this time, well done! Looking forward to see her performing.

[@anonymouscommentator]

Whats the spec of the battery? How much voltage and max current dies it have? I doubt its anywhere near 60hp.

[@emmaff39]

Raz it's just absolutely crazy what you want to build there

[@marinjeam]

love the milling, drilling, cutting everything🔝 very clean build wow🤘 gogogo🏁

[@ronp1436]

מדהים!!

[@yo.its.michael9425]

This puts a new perspective on an all motor car

[@mikeymike3240]

Hi Raz, genius idea man, really liking your engineer 👷‍♀️, he’s a funny 😆 guy.

[@RobTheSquire]

This is why we measure and do mock ups before we put holes in the chassis

[@samcourtrc6767]

This video was amazing raz I can’t wait to see these new builds on the runway

[@justindover8142]

Awesome as always brother!!! Cant wait to see her finished up!!!!

[@Dragonewiz]

LOVE your instuction videos !!!😉😉👍👍I have some rc cars and love them...but don't know alot about the things you are doing 😲😲...but... with your instuctions i really understand alot more about keeping my cars running great...!!!👍👍 "GREAT VIDEOS THANKS FOR YOUR TIME ...AWESOME...!!!🙏🙏😉😉

[@davidnotgidenko]

Recently subbed. Love ur vids

[@EvanAxer]

I bet you anything those gears are gunna shred sooo fast :p

[@lohostege]

Dudes rc car is more powerful than alot of cars from the 50's, and probably more powerful than some in the 70's, that's insane coming from small 4 electric motors.

[@ztwntyn8]

8:16 EPIC wow! Rolls super free also 👌🏼

[@ianbudgetrc2574]

Epic intro. That machinist is a hero!

[@soundmindtv2911]

OMG, the drama and tension!! Haha, I love it!!

[@raymondpietersen3176]

Nice build. But don't you think that the pinion on the main shaft is way to thin? And the pinions on the motors need some work also. Whit this pinions you are grinding the main pinion apart!

[@jujugohard4289]

I think if you connected both motors to one gear it would eliminate failure and gear binding and power loss.

[@jboogierc1820]

Excellent video. This build looks amazing! Thank you for taking us along on the journey!

[@MauzyrockRC]

Amazing. Being rather new to the hobby, I love to get a clear sound of other peeps gear mesh. Strange but it helps lol 👍👍👍

[@youknoweverything7643]

That thing has same power to weight ratio as a Honda civic with space shuttle rockets and boosters on it crazzy as hell man. That much power 60 hp you could literally put all 4 on a racing go kart and have a fast 60 hp electric beast it's possible I saw a guy on KZbin put two giant brushless mamba biggest motors they make on his go kart and he hit 62 mph at 80 percent throttle he turned it up to 140 percent on his radio and it went 78 mph with out him on it testing with him on it he did 68 mph at 140 percent throttle rate on his transmitter. He uses just the transmitter for throttle everything else works like a reg go kart

[@nwie9mm261]

Hello, to be honest, I don't like that with the central pinion. In my opinion, this is too short and will ensure that the large motor pinions will warp. This will also put additional stress on the motor shafts. Either you get a longer central gear or you pin and screw the motor pinions against each other. The system runs syncronically anyway. The only problem you may have is that the motor shafts are not exactly aligned (parallel offset / angular offset), which again causes tension. So I think a longer central pinion would be the best solution! Otherwise it's a great project!

[@belllee7014]

The intermediate gear is installed in two, so there is no need to thin the motor gear, and the performance is more powerful.

[@jarviswoychuk7758]

Your videos keep getting better and better it’s great

[@madmatt2769]

Raz it is one epic build! Awesomeness 👊🏻👊🏻👊🏻

[@danielnagy5721]

Looking at it from the distance, I'd say those gears would need a little case, for keeping them running in oil, as the "real" ones.

[@toddbertram6556]

Gotta check HP at the wheel. HP means nothing if ya can't plant it. In the end, like all things, it comes down to traction. Still going to be fun to watch.

[@tonywalker3793]

"Three quarters of a millimeter" lol

[@marsdenbalaska3]

Was pretty cool but PLEASE DUDE PRETTY PLEASE GET TO THE DANG MEAT AN POTATOES TO SHOW THIS TECHNOLOGY TO US ALREADY? 😂

[@mhrepoman]

You could have used some 2 part epoxy and mix in some tiny shavings of carbon fiber, then sand down the old holes and the area around it and put some tape on the top side, then fill in the old holes with the epoxy with the carbon fiber shavings in it. You would want to put enough of the epoxy that it was built up higher than the area around it, then when it cured sand it smooth and flat. Then drill new holes and countersink them as well. What you did worked as well, but not everyone has access to a lathe like that lol.

[@JCG-049]

Next you need to try 6 motors. Ditch the center drive shaft as well

[@redblue40rc33]

Drive Shaft gear looks a lil thin...should be a lil thicker for 4 pinion gears....

[@angesrcs]

My goodness raz. 😮😮😮. that is an absolute insane, wicked build. can’t wait to see the video on the speed run. 👍🏼🚗

[@technicalmadman2986]

Great project" very well engineered, I think I'll get back into RC one day when I have time..

[@integrityrc7356]

Your editing is getting insane 😎 Once again. Elegance applause 👏

[@toddbertram6556]

I'd make sure all those gears are well deburred. That will be critical to your mesh match

[@vincenttuttle3643]

The video got that many views because it was bad ass you need to do the part two of that video with the wider setup no one has tried that type of blade set up and it worked get

[@joshchatwin8569]

Man that’s awesome but I don’t think them pinions will handle the power of them motors great video and love what you do keep it up can’t wait to see this beast running