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

@DeRock401

2 жыл бұрын

You better hurry up with that build Kev!!!

@Andre_Thomasson

2 жыл бұрын

more like 300 lol

@nickbowker5134

2 жыл бұрын

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

2 жыл бұрын

you got that shredder ready kev?

@vincenttuttle3643

2 жыл бұрын

Yeah that race would get crazy views

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.

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

2 жыл бұрын

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

2 жыл бұрын

@@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

2 жыл бұрын

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

@midship_nc

2 жыл бұрын

@@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

2 жыл бұрын

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

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.

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

2 жыл бұрын

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

2 жыл бұрын

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..

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

2 жыл бұрын

Or he could make the shaft sprocket wider.

@nathanwest2304

2 жыл бұрын

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

@markmmm1737

2 жыл бұрын

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

@nathanwest2304

2 жыл бұрын

@@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

2 жыл бұрын

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???

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.

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!

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

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

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.

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 👏👏👏👏

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.

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 🇫🇷

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

2 жыл бұрын

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

@Greywolf74

2 жыл бұрын

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

@trevorlaquale6602

2 жыл бұрын

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

2 жыл бұрын

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

@Greywolf74

2 жыл бұрын

@@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.

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

You have the cleanest builds ever

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

Greetings from Northern MN 🥶! Awesome bro, top shelf!!!

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

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

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

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

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

Omg! Amazing build as expected ;-) can’t wait to see more!

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.

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!

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

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

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

2 жыл бұрын

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

@orange_tweleve

Жыл бұрын

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.

The more the better 🤣 I like this idea.

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

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.

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...!!!🙏🙏😉😉

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

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.)?

It looks very very nice 👍🏻 really pretty thing! Merry Christmas Dude🎄

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

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

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

Champ is here! Keep it up!

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

This is awesome man 👍

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

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

@keithbranch7718

2 жыл бұрын

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

@never-stock-rc2968

2 жыл бұрын

@@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!

I love that Phantasialand-Music👍😂

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

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

Love it ! Absolutely epic build

Absolutely epic! Keep up the great work

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

That is some gorgeous craftsmanship right there. Absolutely beautiful

2:17 change your locks, a good lockpicker can break into your apartment just off a picture of the bitting on your key

The sound of success! Amazing build

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

Your videos keep getting better and better it’s great

awesome cant wait to see it run

Lov that content!

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

Recently subbed. Love ur vids

Man! the intro 😆 your so funny

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

Is there a video that explains how these motors are 15 HP per motor or the equivalent of 11,250 watts of power?

@richardmiddleton7770

2 жыл бұрын

It's just theoretical peak power. If they are 12s capable motors and can handle 250A peaks they will hit those numbers. It's actually the cables and connectors that are the limiting factors. 8AWG cable and 8mm bullet connectors should do it.

@anthonysimpson2847

2 жыл бұрын

@@richardmiddleton7770 There are more problems than just the cables in getting to an actual 60 hp in the car. while HP is a product of RPM and torque and theoretically one could push 60 hp through a very small shaft by spinning it insanely fast with very little torque that only works for a motor. when applied to a car that HP needs to be translated to the wheels and there is no way those little drive shafts are handling 60 hp unless the wheels are spinning so fast the centrifugal force would make them explode.

Super intro man! 😍! Let’s see this happen!

Epic intro. That machinist is a hero!

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

Great work, keep it up.

“I’ve never built one of these-nor have the money to do so…but let me tell you how you should have made this….”😂

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

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

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

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

Absolutely crazy brother!!!!

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

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

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

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

Can’t wait to see how this turns out!

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

Super awesome 👏

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.

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 ! 🤓🤓

Lovely!

Brutalesch!

🔥🔥🔥Big like from France 🇫🇷 👍🏽 👍🏽

You and that old guy are amazing

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

Belongs in one of those museum display cases!!

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

Nice work 👍

Man This Monster is gonna be amazing~!

I like the wall paper, it's gorgeous

מדהים!!

Looks amazing! Concerned about any chassis flex for them Pinions touching 😱😱😳💀☠️

Gooodayum !!!!! This thing will fly !!!

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

I just wanted to add that your mechanical skills are excellent and the car looks awesome. But my comments below about the motors still stands.

60 horsepower? Hmm. One horsepower = 746 watts. 60 HP = 44,760 watts. Assuming 70% efficient motors, you need 63, 943 electrical watts. You got 64KW on tap? No? I didn't think so.

At the absolute most I would say that the 4 motors together might top out at 1Hp. Even at that it would have too much power and torque for the size components in the car. Marketing has led to blatant lying about ratings on motor. Assuming that the battery is 7.2V. The 60hp rating that is close enough to 45000W. Assuming a 100% efficiency for controller and motor then for 45000W power at 7.2V you need 6250Amps (P=VI (based on Ohms Law)). At lowish current you need 1mm2 of copper for every 10A. In order to conduct 6250A both the positive and negative conductors would need to be about 25mmx25mm. Either there is some over unity efficiency or there's enormous marketing BS. The highest sort of continuous current for RC batteries is 60A and at 7.2V that equates to 430W or a little over 1/2hp.

This puts a new perspective on an all motor car