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.
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!
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
@@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 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.
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!
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.
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
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..
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.
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 👏👏👏👏
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.
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.
@@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
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???
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.
@@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!
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 🇫🇷
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.
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.)?
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...!!!🙏🙏😉😉
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.
@@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.
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
Man I have been waiting for this vid and can’t wait for the running vid as well. You are truly a genius and a leader in the rc world. Everyone else is just a follower.💯
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.
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.
this thing is gonna be crazy!! 203 here we come!!
You better hurry up with that build Kev!!!
more like 300 lol
Shame you got your hands full with your monster truck, would like to have seen a race to the record between both of you
you got that shredder ready kev?
Yeah that race would get crazy views
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.
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!
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
@@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.
How much would it expand? I don’t rly see it expanding enough to be a problem
@@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.
The gears will strip 100%. Should at least have used herringbone for lager contact area.
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!
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.
Wow, so satisfying to hear the gear mesh. Beautiful work as always Raz!!!
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
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
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..
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.
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 👏👏👏👏
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.
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.
Or he could make the shaft sprocket wider.
realistically we are talking about an RC car here, the tires would spin long before anything would be close to slipping
@@nathanwest2304 Then you have never seen a stock rc car strip out it spur or pinion gears.
@@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
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???
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.
Excellent video. This build looks amazing! Thank you for taking us along on the journey!
Raz this is the best channel on CZcams by far IMO!! and this is the kind of stuff the rc world needs!!! Super EP Raz!!!
Keep it up!!
Definitely is and the most professional n take the build serious still love watching Kevin channel...
@@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!
love the milling, drilling, cutting everything🔝 very clean build wow🤘 gogogo🏁
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 🇫🇷
The sound of success! Amazing build
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.
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!
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.)?
Omg! Amazing build as expected ;-) can’t wait to see more!
Wow I hope spool don’t explode under load. This is insane!!!! Thanks for sharing all the great content and creative engineering.
Can't wait for this amazing build to fire up.
I came here for the RC car video, but I can't help but notice how awesome your home is!
Awesome as always brother!!!
Cant wait to see her finished up!!!!
That is some gorgeous craftsmanship right there. Absolutely beautiful
This video was amazing raz I can’t wait to see these new builds on the runway
Amazing. Being rather new to the hobby, I love to get a clear sound of other peeps gear mesh. Strange but it helps lol 👍👍👍
Your editing is getting insane 😎
Once again. Elegance applause 👏
Did you wake up from a dream one day and say you want a quad motor limitless? Epic build man
My goodness raz. 😮😮😮. that is an absolute insane, wicked build. can’t wait to see the video on the speed run. 👍🏼🚗
You have the cleanest builds ever
Badass guy right there :)
Machining well is definitely a super power!
Love it ! Absolutely epic build
The machine shop is always epic. You build awesome toys Mr. Shifrin 🏆🎥🤝🤙
OMG, the drama and tension!! Haha, I love it!!
Ok I was not expecting the way the motors meshed to the drivetrain to be like this….. what an absolute unit
Your videos keep getting better and better it’s great
Absolutely epic! Keep up the great work
I like how your videos are like a motion picture production! Awesome!
Can’t wait to see how this turns out!
Raz it is one epic build! Awesomeness 👊🏻👊🏻👊🏻
awesome cant wait to see it run
Super intro man! 😍! Let’s see this happen!
Greetings from Northern MN 🥶! Awesome bro, top shelf!!!
Epic intro. That machinist is a hero!
Champ is here! Keep it up!
I completely lost it when he started exercising! 😂
This is awesome!
Sheesh! That thing is nuts! Excited to see it run!
Awesome! Better hurry! I'll be hitting 205 next summer 😉
Mega video this time, well done! Looking forward to see her performing.
I haven’t even watched 1/4th of the video but the intro I already love it
Man This Monster is gonna be amazing~!
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...!!!🙏🙏😉😉
Lov that content!
This build is epic! It even has more horsepower than my car!
Absolutely crazy brother!!!!
Great work, keep it up.
Lovely!
The more the better 🤣 I like this idea.
RAZ YOUR SOO COOL !! YOU SHARE YOUR WORK YOUR ACHIEVEMENTS WITH THE WORLD . YOUR A LEGEND !!!!
It looks very very nice 👍🏻 really pretty thing!
Merry Christmas Dude🎄
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.
I think he did the following, simple calculation: If 2 motors are rated for 30HP, 4 motors add up to 60HP.
@@S3irun Yeah but where did the 15HP per motor rating come from? It didnt come from Castle.
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
@@Greywolf74 just looked it up, website says can easily reach 10hp range so there not claiming 15 but im shocked
@@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.
Hi Raz, genius idea man, really liking your engineer 👷♀️, he’s a funny 😆 guy.
Yow Raz, really kool shavings! If Saga could see u now!🤣🤣🤣
I like the wall paper, it's gorgeous
Great project" very well engineered,
I think I'll get back into RC one day when I have time..
This is awesome man 👍
I love that Phantasialand-Music👍😂
That's more power than some road cars. I'm genuinely impressed.
Your pinion is as big as my spurgear . Crazy build.
Gooodayum !!!!! This thing will fly !!!
You and that old guy are amazing
I am more interested in a tour of this gorgeous apartment. Amazing design…oh yeah, good RC work ;)
I dont even have an RC..... One day...... Butni love watching your builds
This must be 60 of those MAGIC Chinese HP's we all hear about ?
🔥🔥🔥Big like from France 🇫🇷 👍🏽 👍🏽
This puts a new perspective on an all motor car
Belongs in one of those museum display cases!!
Super awesome 👏
Looking sooo good 👍👌👍
I'm probably a little behind on your channel but I will catch up, anyway the car looks very nice, very clean & neat...👍👍
8:16 EPIC wow! Rolls super free also 👌🏼
2:17 change your locks, a good lockpicker can break into your apartment just off a picture of the bitting on your key
Recently subbed. Love ur vids
The intro is epic.
Have you ever thought of turning the motors around and using 2 Pinocchio Spools to run directly to the gearbox
That’s sick
Greatest opening video... Like trailers movie in Hollywood 🍻 cheers
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
Man! the intro 😆 your so funny
Wow just wow
Nice work 👍
What a beast
Man I have been waiting for this vid and can’t wait for the running vid as well. You are truly a genius and a leader in the rc world. Everyone else is just a follower.💯
Your a mad scientist 🙀
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.
Good job
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.
I was gonna say the same, also de-bur the gears after the lathe! It will cause severe mechanical wear
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.