Why single-caster skates are Easy

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I recently discovered freeline skating or free skating. These are skates which each look a bit like a little skateboard. They have two wheels each but they aren’t attached to your feet like rollerblades or rollerskates, you just stand on them. Free skating is really hard, but I can make it easier with less wheels and jet engines? Caster dynamics are really interesting - the physics involved mean that skates with caster seem to automatically stabilise through a passive-dynamic system which always pushes you upright provided you can keep moving. I 3D printed some pieces and used a CNC to make the main skate platforms.
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Опубликовано:

19 сен 2024

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Комментарии : 619

@sokudonkalitrex1598 Год назад

And this year's "Most Novel Way to Injure Your Knees" award goes to .... Jet Engine Stilt Skates!

@eminstinct4114 Год назад

ok that got me

@U014B Год назад

He certainly is a Certified Innovator.

@vivianchang6802 Год назад

Yes

@irri4662 Год назад

Airbags not included

@Francois_Dupont Год назад

i was about to comment this: it look like an ingenious way to brake your leg.

@gicknardner Год назад

I appreciate you going through the effort of building these rather than just buying them directly from ACME

@Jeremy.Bearemy Год назад

Meep meep

@cyruspalmer98 Год назад

That's a great comment 😂 👏

@johan6983 Год назад

Those only came rocket powered.. bit overkill.

@a-swizzle8846 11 месяцев назад

giggled at this comment bravo

@jerbear7952 8 месяцев назад

So good

@frostymoments Год назад

"I need a block of wood to stop the caster from moving... so I printed a couple." When all you have is one glorious hammer... :) So impressed with the work James does.

@l3urnell 9 месяцев назад

"I need a rectangle with some holes in it, so I busted out the cnc and cut it out of the middle of the sheet."

@bermchasin 8 месяцев назад

and then proceeded to saw it to the correct dimensions.

@bentsprockettech Год назад

That is probably the scariest, most hyper complicated skate arrangement I have ever seen sir. Awesome! Thanks for sharing this one with us. :)

@NUeB_net Год назад

09:10 The stability effect you're experiencing is called trail. It's like when you let a normal bicycle roll on it's own (or ride w/o hands on the handlebar) - when the bike leans to one side, front wheel PLUS fork steer and bike goes back in a stable position… as long as it's fast enough.

@DrWhom Год назад

the Dutch use the verb sporen which means following a trail

@Jesayou Год назад

Same thing for vehicles when you let go of the wheel and it centers its self caster is a fun adjustment

@DnB-BMX Год назад

This!!

@derjansan9564 Год назад

I really hope we will see an update on the caster scooter with the caster wheel mounted in an angle the same way you did in this project. I think this should work much better than your previous attempt.

@revimfadli4666 Год назад

Yes!

@ratman6417 Год назад

definitely!

@alanrice8614 Год назад

I learned to ride a unicycle by holding on to a shopping cart. It keeps you steady and upright while you learn to use your body and feet to balance and steer. It might also help with learning to use those leg-breakers. :)

@DeetotheDubs Год назад

I've always wanted to learn how to ride a unicycle. I'll have to keep your advice in mind should I ever get the chance.

@Amanda-C. 8 месяцев назад

You'd want a small, light, maneuverable cart that's very open in the back so you're not banging your knees or the uni wheel into it and you don't have a hard time keeping it aligned with you. And not for any wheel bigger than a 12-inch, or you'd never find an ordinary shopping cart with enough room for the wheel. Also, how old were you? Were you at your full height? I don't have my old 12-incher anymore, but unicycles don't usually position you very low to the ground. I feel like, at my current size, the handle would end up about mid-torso, at which point any fall would dump me headfirst into the basket...

@bornach Год назад

I never in a million years would have thought that could be made to work as well as you've demonstrated here. Astounding proof of concept!

@tombuster Год назад

Gosh, at 7:50 these look tailor-made for hurting your legs in the worst ways imaginable! I'm also surprised you managed not to gauge a nasty scratch in your car! Honestly, though it's very impressive how far you actually rode those rip-skates, I can't imagine turning or riding like that being used to usual skateboards and ripboards

@zardozspeakshs1111 Год назад

that clip from Braille skateboarding.... seems like it'd be a natural collab project between the two of you. You've got insane sports gear, they've got a professional skate park and pro skaters. They have a series of vids where people send in crazy skateboards made in bizarre and stupid ways and they try to skate with them.

@jacobe2995 Год назад

well as long as they have the paperwork to free him from any liability of injury then heck yeah!

@kinnikunky Год назад

heck yea!!! we need James to start sending gear to Braille!!

@Excludos Год назад

@@jacobe2995 With the amount of sketchy things they do, I'm assuming they have piles of it at the ready

@skeetsmcgrew3282 Год назад

They fell off hard years ago. After Fetty turned out to be a predator and Carlos left it seemed like everything went downhill. Maybe I'm just an old man who doesn't like change, but it really didn't feel the same anymore

@jjeshop Год назад

The church of scientology won't allow Aaron to travel all the way to the UK.

@jerredshifflett6287 Год назад

word of advice for riding anything perpendicular to our body's symmetry . Keep you hips and knees slightly bent. I used to keep myself upright like a tree when riding stuff. Your whole body will fall over at once when you are standing up right. Make sure you know where the humans center of gravity is and how to manage it when getting in a good riding stance. I really love your channel and you have inspired my own robotics projects. I found the issue with mass when making scaled down version of a suspension design. Engineering is especially fun in that regard.

@anonymous5405 8 месяцев назад

I appreciate you going through the effort of building these rather than just learning to use normal free skates

@irri4662 Год назад

Only one pair of pants were hurt in the making of this video

@ChristianBehnke Год назад

Trousers. 😂

@officer_baitlyn Год назад

@@ChristianBehnkejeans

@irri4662 Год назад

Pantaloons. 🤣

@8epic819 Год назад

Dang thats crazy James! You experimented a lot and really explored that field and came up with an interesting solution!

@ARockRaider Год назад

i love how every stage of this project looks more dangerous then the last.

@anonymous5405 8 месяцев назад

I appreciate you going through the effort of building these instead of just learning to use normal free skates

@caardappel Год назад

This video escalated amazingly! Also, it made my knees, ankles, groin, and tailbone ache in sympathy for you, but that might be age talking. Great work on this one, lots of fun!

@ionbusman2086 Год назад

I love my free skates! They’re quite hard but once you get it, you never forget… and the feeling is awesome with 100% control.

@greggv8 Год назад

Years ago I saw some odd skates in an old magazine. Two children rolling along on one wheel skates. Each foot had a single large wheel on the outer side. There was a rod or platform to support the foot and a rod up the outside of the lower leg, strapped to the leg. The wheels looked to be at least 6" diameter.

@GabeAltier Год назад

What an incredible way to showcase the freeskates! Awesome video James!!

@ifitsrusteditsmine Год назад

Adds turbines, removes helmet. 😅

@one-man-band 8 месяцев назад

The way the "rip-stick" worked was by allowing you to rotate your hips to steer around your leading foot. So to make a left turn, i lead with my left foot then rotate my hips so that the back right foot swings from behind, redirecting my forward foot. The way it propelled was by allowing you to essentially rotate your hips to 'push' off the ground. Like self propelled snowboarding, you steer with your propulsion. Since your propulsion was essentially staticly oriented, you never had a way to control.

@chrisblake4198 Год назад

Steering solution- look at the Rip stick for inspiration again, and make your lead wheel fixed instead of a caster. May make starting harder, but will work as a guide wheel when you twist or lean over it, once you're going.

@cavemaneca Год назад

I don't know what kind you've ridden, but the only ones I've seen have a rotating caster in the front as well.

@TheDutchMagicTeacher Год назад

10 or so years ago i had a waveboard, which seems similar to what you have except the two pieces were connected to each other. So maybe what i remember from that can help you here, to steer, you push your back foot in the opposite direction, not verry far, just about a foot or so, obviously, the further you push that foot, the smaller your turning radius. To gain momentum you would basically steer left to right continuously in quick succession. Hope it helps!

@Xaaaach Год назад

Oh, so a Ripstick?

@TheDutchMagicTeacher Год назад

@@Xaaaach yes, that seems to be the same sort of thing

@CandC68 Год назад

When the only way to stop is: Crash or fall, I consider that a warning. So brakes must be added. When the only physical result is: exhaustion: A rest item must be added (seat). When the only apparent steering used is just to keep going straight, and not fall: A steering mod is needed. Congratz, you have reinvented a mini--bike. BTW I loved the attempt, and excellent video. But you do need a support team, including a medic.

@tenchuu007 Год назад

The best part about this solution is the practicality.

@muxpux Год назад

I bought a summerboard. It’s a skateboard with castor wheels under it. Rides like a snowboard. Took a while to learn, but now that I can ride it well, you essentially ride on the castors. It’s super fun.

@tubbymitchek Год назад

In theory you should be able to translate your feet(as it would be sideways) and by design you should move forward. With forward momentum, the back and forth motion of the casters would propel you forward I would think. Add in the fans and even more speed.

@Atmos_Glitch 9 месяцев назад

My man's just discovering how a bike works, without discovering how a bike works in this video lol...

@chrissugg968 Год назад

I love how it just gets bigger and bigger and sillier and sillier as the video goes on.

@arcanealchemist3190 Год назад

it was interesting to see james slowly approach a ripstick. like you could probably edit a ripstick underneath him in the final footage and his movements wouldnt be far off. the funniest part is you could for sure go faster on one, with no engines.

@Yosser70 Год назад

James seems like the least daredevil person but does some proper sketchy stuff 😂

@freescape08 Год назад

Yeah, about that propulsion thing... the original ripstick already solved that,and it made it more compact by connecting the paddles together instead of to your leg.

@victorro8760 Год назад

You tilt your ankles in opposite directions to steer on a ripstik. You can't do that with your cut off ripstik since they're strapped to your legs. You could get around this by putting a hinge or something where the strut attaches to the board.

@evanrhildreth Год назад

With the foot straps and leg brace, you essentially recreated a boot - you could have started with a pair of in-line skates.

@bphater31 Год назад

It took me a week to ride the freeskates. In some way it's similar to snowboarding. But freebord is the most similar. Anyway... Can you make a 4 caster wheels on an angle but wheel position like a skateboard?

@Komeuppance Год назад

Looking forward to a self balancing free skate robot!

@Dolmeca_the_Knight Год назад

His sonic the hedgehog robot was a self balancing skate robot.

@Robotron-zg6mf Год назад

Skatotron 2023

@zernofoo345 Год назад

I really want to try this. How confident are you on a ripstick? Perhaps using the same technique as a ripstick will allow more control with more speed

@mistermagnifico Год назад

The surface on the ground changes too. The kitchen is smooth and the carpet offers more friction which helps

@ankokuraven Год назад

"How do we make this harder?" + "lets strap jets to them" = perfectly balanced, as all things should be.

@jimysk8er 11 месяцев назад

just a reminder that with roller blades you make pivoting your feet easier by transferring your weight onto fewer wheels to unload friction and retransfer the load to apply friction to turn. in reality its more of a balancing act between the two. the saving grace is that you have the option of always having two stable wheels to rest on an some limits to movement. the rip stick works because the distance between the pivot points of the casters is fixed. the amazon skate things always have at least two wheels touching the ground and your side to side movement is restricted. these all somewhat act like a sailboat where the keel restricts the tilting movement thus transferring the forces into the direction where it has freedom to move.

@leonardodelpuertoburk2439 8 месяцев назад

These seem like a great way to test wether your knee will break before your ankle snaps or not.

@thePavuk Год назад

It's like "Hmm, I'm in mood like... I wanna totally break my legs and may be few other bones... like in funny way, and make it original."

@Draidzeven Год назад

James' ankles: blink twice if you need help!!

@DrWhom Год назад

I am more worried his knee caps will pop out at some point (yes, that can and does happen to people).

@BobsBikingAdventures Год назад

What a marvellously preposterous contraption. Love it! 😎👌

@SaperPl1 Год назад

I'm pretty sure business-oriented dentists approve of those types of locomotion :D

@Sophocles13 8 месяцев назад

Lol imagine how ridiculous the Wright brothers looked... until they started flying! Keep creating!

@matteomascaropennacchi2220 Год назад

I rally Love this, This could be used as benefit device and Militar help

@quintonschellenberg575 9 месяцев назад

Keep at the free skates, they're really fun! It took me just a few days to stay upright, and then a week to get going on flat ground. You'll really notice your legs getting stronger in ways you've never considered.

@eekee6034 8 месяцев назад

Interesting to see RealVNC advertising. :) In the past, I used VNC extensively as a disability aid, allowing me to lay down or sit up as needed without changing what I was doing. Had to give it up because using a laptop in bed was killing my neck. Touchscreens were better for me, but all of the software I used was absolutely terrible on touchscreen. I kind-of should have adapted that one self-compiling IDE-compiler I was using, but wasn't happy with its coding language. A Raspberry Pi wouldn't be a suitable component of the system anyway.

@TheRealAlpha2 Год назад

I'd say go back and watch some of those Braille skateboarding videos, after two tor three episodes of them falling on their butts learning rips-skates and free-skates you almost absorb the understanding like Neo in the Matrix learning kung-fu. Granted, I think for either of these you need strong legs, but still impressive that you basically made electric ripskates out of necessity.

@nonoyorbusness Год назад

Bringing new meaning to the phrase "break a leg"!

@VarionJimmy Год назад

I’ve realised that the most important thing to get used to is falling. Then you know how to do it without getting (much) hurt. But the parking lot at the end.. what a scary surface! Looks like a grader. 😳

@kameljoe21 Год назад

Heelys exists for a reason... I love his attempts at these things!

@S0UPIE Год назад

I was really surprised to see a Braille Skateboarding reference here. I just bought my first skateboard from them and have been practicing for a few days now.

@sgsax Год назад

"Let's take something easy to use like skates and make it harder! Also add jet turbines!" 😂 Absolute madman. Ridiculous fun. Thanks for sharing!

@TruMaverick 8 месяцев назад

Cool design. You rode through the puddle like a champ

@djdt_614 8 месяцев назад

Fun project! You should try moving under your own power like the ripstick which is very similar to what you have except the two platforms are connected by a single axle. On the ripstick you twist your hips back and forth which sends your feet forward and backward. The wheels draw a cross cross S shape on the ground as you propel forward.

@shizbyrc8438 Год назад

You fall more safely than I ever could, sir.

@4thWardTechnology 8 месяцев назад

Those jet thruster made is so exciting!

@nickcarr5724 11 месяцев назад

i love how absolutely insane this is.

@NR-rv8rz 11 месяцев назад

At 07:35 did you consider connected the two skates with a bungie cord to avoid leg splay? Could be attached at the shin brace level to prevent the cord from getting tangled in the wheels when your feet are close together.

@xaytana 11 месяцев назад

I remember coming across free skating over a decade ago when the trend at the time was a hubless wheel that when around your foot. I wonder if there's a decent way to turn those into a pivoted castor to adapt their design to this kind of design. With the much larger contact patch, and the other benefits hubless could provide, it seems like a good combination.

@aserta Год назад

Whatever else... kudos for putting yourself through that torment. I used to be a pretty good skateboarder, i'd probably be now, the old guy who wipes out trying to show the kids a cool trick, but when i first tried freeliners, i fell over several times until the guy who borrowed the set told me the secret. You need to forget about them being skateboards or skates. They're neither. It's less about continuation of motion (which is the core element of those two) and more about static balance that allows you to move in a direction. It's like that trike that was popular for a couple of years many moons ago, the one where you'd lean left (which would twist the trike body) then lean right, then left, then right and that would create a forward motion. It's similar in that respect. You're using your static balance to create motion.

@johns1307 Год назад

The fans kind of miss the point of the casters. if you move them opposite directions (watch a caster board, its why it twists in the middle) the wheels want to correct themselves to return upright as you described, which gives you a jolt along the axis perpendicular to the twisting motion. You just need to move your feet forwards and back almost like you are walking and you will gain momentum to the side

@DevinDTV 7 месяцев назад

i was pretty confused why you immobilized it which defeated the whole purpose of caster, which is self-correction of tilt. if you tilt to the right, the wheel turns to the right.

@tylerm124 Год назад

You cant steer because to steer on casters you have to tip onto your toe on one board and tip to your heel on the other. The leg braces make it essentially impossible to do that. If the braces had a pivot point with likes tromg springs to make it eant to stay cemtered except when you want to steer might work

@jacobp.6610 9 месяцев назад

Thats my boy Jeff from JMK freeskates! So good to seem him out in the wild! ❤

@lasersbee Год назад

Got to hand it to you for not giving up... never laughed so much

@truejim Год назад

9:35 It’s also like a bicycle, true? If you’re falling one way on a bike, the angled front fork passively turns the front wheel into the fall, so the forward momentum gets the bike’s wheels under the center of mass again.

@aerolus Год назад

i had a ripstick as a kid and it sucks because theres no way to slow down and maintain stability

@markohoepken1423 Год назад

What a cool "stunt show" this time. Please do not break our neck or head. Overall: Useless but looking SOOO COOL with the fans. Thanks for sharing.

@jwsmite Год назад

I've got an idea for a future project, how about fractal suspension? Like those fractal clamps, I saw someone made a fractal chair too, seems like it could be good for a rover concept

@alexnikolas1991 10 месяцев назад

This is like watching a baby giraffe trying to stand for the first time lol

@douglastaylor43 Год назад

I don't know why but this is incredibly awesome. Maybe your best build

@jamesbruton Год назад

Thanks!

@truedepthaquaponics7118 11 месяцев назад

Im loving the evolution of the design process. Great work 👏

@E1337N3SS Год назад

My man invented sideways heelies! I love it

@pseudotasuki Год назад

I think you might be able to turn by shifting your weight. If you put mere weight on your left leg, your left knee will bend, tilting the front castor right and therefore turning right. The opposite would turn the rear costor right, causing you to turn left.

@mckenziekeith7434 Год назад

If it is like the ripstick you turn by angling your feet in different directions. Lead foot leans into the turn (like a skateboard) and trailing foot leans away from the turn (opposite of a skateboard).

@speakp4ngolin Год назад

Would actually love to see a caneskate; Like a pole with a single skate on it that allows the entire thing to fold up and telescope into a small package. (Perhaps even a motorized version)

@minecrafter0505 Год назад

I thought it would be impossible to cut a Waveboard (board with two inline casters) in half and drive around, but apparently, I'm wrong.

@Dogburt_Junior Год назад

So there are electric freeskates out there. The brand I've seen the most is Summer board. They have powered castor motors. I wonder if throwing those on with a VESC would do the trick.

@quentinreid3111 Год назад

i was really thrown when you started making jet propulsion for the caster skates. It didnt seem necessary to me seeing how rip-sticks are propelled manually from swiveling your hips and legs. I would assume that while more difficult, the same principals would apply to the independent skates on each foot.

@jrzlz 8 месяцев назад

As an orthopedic surgeon, I love this.

@Dysiode Год назад

I will say, I own a pair of largely unused Freeline skates, and the freeskates you have have much more boxy wheels. The JMKRide freeskates have an even more rounded profile than their original design which I think helps considerably with turning. You also DO tilt your ankles a lot to turn on freeskates, it's not just yaw, which is why I think the square wheel geometry is hurting you

@Peter_Monti Год назад

Hello from Australia 🇦🇺 this video was making me nervous 😅 happy to see you didn't hurt yourself

@Shanemarsh28 Год назад

Nice! A winning entry for the most innovative way to break your ankles.😂

@OMNI_INFINITY Год назад

Really need to overcome that “it’s not “cool” to wear safety gear” personal issue there

@alanmartin_89 Год назад

Just imagine pulling up in a car park and seeing James Bruton skating around on his newest invention. I would loose my mind. lol

@beaniiman 11 месяцев назад

Braille Skateboarding cameo, yes!

@tarcucciolo Год назад

This is insane, you really are a mad scientist! Highly entertaining content, i had no idea where you get these ideas from

@Zed_Oud Год назад

So a revisit of the 1000W Caster Scooter with the 30 degree incline?

@justinsmall756 Год назад

have you thought about feet that retracked up when starting or stoping or when you want to walk the feet drop down giving you a way to stand and walk could even add small wheels to the feet so you can start moving with them down and they pop up while your moving

@Makujah_ Год назад

You should ask Colin for some of his safety ties to wear while testing these highly experimental dangerous prototypes

@lamMeTV 11 месяцев назад

Why dont you just wiggle the back one like a rip board?

@Jesayou Год назад

Caster is great variable for self righting with velocity, honestly if you get positive castor on the lead foot maybe I think you could steer but im no steering angle geometry god and most time the intuitive take is wrong. Thats why every car has bout 4.0-6 ish degrees of positive caster to self right your steering wheel and stability stuff (some vehicles are like at 7 to 9 degrees to their engineers wtf?) Also they used to use negative caster for vehicles back in the day but Ive never looked into why they changed it.

@dafoex Год назад

One thing i've wondered for a while is if you could have self balancing skates like Segway shoes or Boston Dynamics's Handle but on a human. One wheel on each foot, each actively tries to stay upright, some throttle control to either move them both together or control them independently, steering would be done by leaning, speeding up one wheel, or probably both. Never done more than just think about it, not tried to make it or anything, but it was a thought nonetheless.

@TheonlyaviableID Год назад

I haven't learned to balance on two wheel for each foot, so let's do it on ONE wheel on each fot...with JETS! =) Also, it would have been a perfect moment to add some old "first attempts at flying machines" mixed with your little section at 7:38 =)