How fast can we spin a titanium skateboard wheel? There's only one way to find out. I made a custom wheel in pursuit of our goal of reaching 200,000 RPM. We used our 60,000PSI waterjet to spin it up to outrageous speeds.
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What would you guys suggest on how to get our RPMs higher? Our next three strategies are to try lighter materials (magnesium or carbon fiber), hollowed out wheels, and finally smaller diameter wheels. At this point those seem to be our only bottle necks, anything we’re over looking?
Rutts in the titanium
VTEC
Tungsten?
Smaller diameter titanium wheel and spray paint it white and then put a nice thick black sharpie line in order for your tachometer to get a clear reading :)
Cut a groove in the side of the Ti wheel (and make sure it still balances). Then, using the water drops as a time reference using a black and white checked board with known measurements (like they use in myth busters) you should be able to get an accurate account for the time and rotation of the wheel.
Should have just drawn a white line on the wheel
Exactly 😂
Yeah that is what is was thinking😂
We’ll certainly give that a try. We were a bit rushed with filming and didn’t have many marking options handy.
That or a piece of tape or they could have scribed a line on
I love white lines
If you're asking if it would produce a sonic boom, that's a no. A spinning object doesn't produce the kind of compression force needed for a boom. A sonic boom is produced when air is compressed at a faster rate than it can expand itself. The wheel would have to be moving, not spinning. Since the wheel is a uniform shape, there's nowhere along the wheel for air to accumulate and compress. As far as producing a different pitch or tone, though... That's beyond me. I'm not familiar with that part of physics
This makes sense, took a few physics classes and somehow missed that red flag. Though this does beg the question, could you start something on fire purely from air resistance in this fashion.
@@DoubsGaming yeah, i think so. Pretty sure that's what happens when objects enter Earth's atmosphere. It's part of the reason designing spacecrafts meant for re-entry are so difficult.
You can actually hear the fan blade tips becoming supersonic on moder high bypass turbofan engines, it maes a very strange buzzing sound, so its definitely possible but in this case unlike a turbofan this wheel is completely smooth so like you say I don't think it would create any notable disturbance in the air, who knows though I'm not an aerodynamisist or an engineer
bearings
@@mishkamcivor409 the thunderscreech planes propellar would also make a visible shockwave because of how fast it was going
I'm an engineer. The limiting factor on wheel RPM is parasitic drag from air resistance and bearing friction; not the weight of the material. If you had low enough friction, the outer surface would achieve the same velocity as the jet. The best way to achieve lower air drag is to polish the surface of the wheel, and place the whole contraption in a somewhat airtight cylindrical container, so a rotating mass of air can form around it, instead of accelerating the stationary air in the room. But by far the biggest improvement could be had by removing the grease from the bearing. After all you only need it to work once.
I think I've only seen one other comment correctly pointing out that a lighter wheel wouldn't help. IDK what mechanism they're even imagining for a heavier wheel to have more drag. With good bearings, the extra weight on them should be negligible compared to air resistance. If the wheel isn't perfectly balanced on the same axis as the bearing, a lighter wheel wouldn't wobble as hard. But I think wobble must be low enough to be pretty negligible, or something would probably break at those speeds. Wheel *diameter* on the other hand is a significant factor. The outer edge of the wheel can only reach a linear speed of at most the water jet speed. The larger the wheel radius, the lower RPM for the same linear speed. Cutting a groove into the wheel (or just shrinking it) would give the water jet a higher "gear ratio" in turning the wheel. ---- Interesting idea about a housing to allow rotating air. It would still have to allow water from the water jet to escape so it couldn't be airtight everywhere, but yeah you could maybe get a shroud around it that would encourage air to move around it. (Unless you were driving the wheel by a different mechanism, like electromagnetism, like a DC motor at a distance? Then you could put it in a low-pressure / partial vacuum bell jar or something. Makes me think of some modern hard drives that use helium.)
Im also an engineer, they need to use ceramic bearings if they want to achieve such high rpms with lower friction.
@@xxn0cturn3xxWhy ceramic and not tungsten carbide ?
@@xxn0cturn3xx They are using ceramic bearings lol
@@RovingPunster better yet, why not sapphire bearings?
This is the type of unhinged video that got me hooked on youtube back in its early days.
😮
we have come full circle
Try making a magnesium wheel but press fit a titanium sleeve around the outer diameter to give it more strength. Should hit crazy high RPMs as magnesium is significantly lighter than even aluminum.
It would accelerate faster, but should reach the same rpm. Also be careful as magnesium fires are troublesome
wouldn't one of the materials stretch more than the other and cause significant problems?
Beryllium? although it'd be mad expensive.
I feel like *magnesium* and a *water*jet could be a funny combo
@@matthewmorgan582 They would die from berylliosis. Do not fuck with that shit.
Take it from a guy who mass machines titanium on the regular, whatever speed you think you should be running at, halve it. Most machinists who are unfamiliar with the material go way too fast and destory any cutting edge you once had. Bi-metal band saw blades will cut it but have to be sharp and run slow, 300 series stainless slow. Cutting it on the lathe, use carbide and go a hair slower than stainless steel speeds.
Agreed, also a steady stream of coolant on the tip of the cutting tool helps too
Is there a reason they didn't just use the water jet instead of the bandsaw for the rough cut?
@@76Arfa I truthfully don't have an answer for you. I am primarily a lathe operator but I can guess that cutting over a round surface can be a challenge on the jet because it gets deflected but I really don't know. Also the struggle may have just been better content.
I also cut much Ti and Inconel. When I discovered cermet inserts my life changed. Now, I ENJOY Ti, Inconel and hard machining. Maschosicism at its finest.
Agree! Titanium (especially the machinable grades) isn't hard to machine as long as you go VERY slow. I was making a titanium pen (yeah, go figure) and lost several drill bits center cutting the middle out until I realized I was just going a little too fast for the heat. I slowed down just a little and it cut beautifully. Once it starts grabbing, the heat skyrockets and something breaks. It's almost like copper, but not that gummy. Despite the hype, titanium is softer than steel, but harder to machine unless you go slow.
You could possibly increase the max speed at the outer diameter by creating a tophat shaped wheel. Point the waterjet at the smaller diameter section and the larger half may move faster than the water from the jet just like higher gearing in a car. It will however be harder to spin.
This is the first video of yours that I've watched and while waterjet videos don't exactly peak my interest the comedy/editing will keep me watching haha, keep it up
*pique
First, use a silver or white line for contrast to get the Tachometer to work. Also, the titanium wheel would most likely have a different resonant frequency especially since you changed the bearings. Bearings are usually the noise maker anyway and since you upgraded them the frequencies almost certainly wouldn’t correspond to the same RPMS. You very likely exceeded the RPMs of the aluminum wheel with this experiment. Keep it up, i love this stuff, it’s why i like engineering!
My first thought was using a white paint marker. Nice
Bearing will affect the sound/harmonics. Can’t use the previous frequency. Next time don’t anodize it so there is more contrast for the meter!!
or heavily anodize half the wheel to create contrast that stays on.
A white line on the black wheel would have worked just fine.
Or to just grind off the anodize in a line
@@minimalskill6592 minimal skill but maximum brain
You need a white mark on a black wheel, these tachometers don't work very well with black marks on white wheels, because they need short impulses of a light surface. But usually they don't work above 100,000 rpm....
Great entertainment. I can tell you have working around this shop forever as your ability to cover all ideas or theorys with tests along with funny spats makes this very fun to watch! Great job!
The trick to ti on the band saw... 1 flood coolant, 2 brand new Lennox blade! 3 turn the band speed as low as it goes, I don't care if the Internet gave you a different speed. If it's a variable speed, turn the adjuster till the band stops moving then turn it up till it barely works. If it's a multi speed, put a vfd controller on the motor to slow it down. I've been able to turn induction motors down to 15 hz which is 1/4 speed. It might even go down to 10hz. As for the lathe, If it's a fairly heavy lathe you can take pretty heavy cuts. If you have lots of cooling like a CNC you may even be able to go a reasonable RPM. Ti likes CNC lathes. Continuous cuts are good. Thick chips are good. Prefer a feed/rev relationship over higher rpm. Thin chips are bad, high rpm is generally bad unless you have the cooling capacity. For a manual lathe use power feed and if you want to be safe use a very low rpm. Always use new sharp tools. For a milling machine, well if it's CNC use climbing cuts and a fixed feed rate, no slowing down for corners. Use healthy oversteps. A thin chips will harden the work and break the cutter faster than an abrupt 90 corner with a heavier volumetric load will. If you are manually milling, you may be able to face it. But good luck profiling it. It hates conventional cuts and heat. But climbing cuts heavy enough to punch through the work hardened surface will likely draw the work into the cutter. You can try locking the gibs and letting the leadscrew pull through the friction. But a CNC with ball nuts is just a more reliable way to work with it.
This whole channel feels like a post-apocalyptic Waterjet Channel where a lone survivor stumbles upon the location and partial ruins of the Waterjet Channel and started making videos to keep from going insane.
Yeah, wtf happend to the channel?
The good people left and the channel died
they never made a video about it makes me think the channel and the other guys parted on bad terms?
@@xJagaimo I heard somewhere that they moved to a different position or something, it’s just not that good without them tho
Since the titanium isn't gonna get gouged out as much, to maximize the speed you are gonna want to have it hit the wheel further out so the water stream is hitting at an angle closer to tangent of the surface of the wheel.
Also it would likely be a good idea to move the jet away from the axis as the wheel expands.
You're giving advice to someone who can't even bother to fit a bearing properly. Also someone who's best idea for spinning wheels quickly is to unbalance them as fast as possible. Also someone who thinks puns and bad accents are the height of wit. etc.
@@amarissimus29 yes because you are much more capable funny witty etc....get a grip
@@amarissimus29I bet you still get invited to all the parties and end up with all the beautiful women.
I like your sense of humor. Makes me feel at home.
I hope there is a part 2 to this video where you try different kinds of lead or metals. This was top 3 of videos you have ever done in my opinion. I want to see 2 bullets fuse now and hope you get it done. Good Luck and God Bless
The peak frequency of the fundamental tone on the Titanium sample reached a maximum of 953Hz (on my spectrogram). That equates to 57,180 RPM. I'd throw out your tachometer, and ignore any previous readings. Working out new speeds based upon the previous rpm measured with it will be giving falsely high results for everything. They can pick up false signals (harmonics) and give you twice the speed or more. Here's my measurements: *Resin + Titanium Shavings:* 429 Hz * 60 = 25,740 RPM *Copper:* 332 Hz * 60 = 19,920 RPM *Titanium:* 953 Hz * 60 = 57,180 RPM
@ 12:50 in the video, the peak reading is ~924 Hz, which equates to 55,440 RPM. @ 13:02 in the video, peak reading is ~1320 Hz = 79,200 RPM.
Someone else did say that different bearings produce different sound signatures so doing another series of tests with only ceramic bearings would also give a more accurate result.
@@DoubsGaming denser materials sounds different too
@@DoubsGaming Good call! I think the difference in sound would mostly come from higher harmonics and intermodulation (which can produce frequencies lower than the fundamental). But still, would be great to keep everything constant except for the material being tested. 👍
@@retrocompaq5212 Aye, you're right about the different sounds. I should probably make a video on this - after my audio interface is repaired for the 2nd time in a row. Differences in sound characteristics usually come from frequencies higher than the fundamental. Usually, the fundamental (1st harmonic) is the one to look at, as it'll be the one that represents the rotation speed (except in cases of strange vibrations). But usually you can see these other vibrations starting to occur in the spectrogram and ignore them.
Your presentation and editing have gotten better... Keep it up
Some good precision machining the bore, and balance it when your done, the balance will greatly improve your rotational speed before failure. This very cool, thanks for sharing. Cheers!
Legend has it the wheel spins faster than Sonic
Lol😊
Go away Walter!
waltuh you aint supposed to be here waltuh
Here's an idea to get the tachometer to read. You guys electrocuted it so it turned blue, well dip half of it In the solution so it becomes a different colour than the other half. I don't know how the tachometer exactly works, but it's how I think it does, it should be able to give a reading. And it won't rub off like the sharpie did.(I have no idea if it will actually work but it's an idea)
Tachometers like that usually use reflective tape strips that you put on the object to have a stable signal
The proper thing would be to put a retroreflective strip on it.
@@RIGeek. Most laser tachometers even come with some
@@RIGeek.Can't. You can't put anything on or take anything away. IF it sticks, it causes a disbalans which is very dangerous at those speeds.
This idea of discoloration is kinda decent does not have to be 50% of the wheel consider 5% to 10% to get some kind of stripe.
you calculate the upper limit on rotational velocity for the titanium wheel. the wheel will never spin faster than the surface velocity of the water hitting it. so you use the formula to convert surface velocity of a wheel to rotational (using the radius of your wheel) and that is your absolute upper limit. you know it will actually be less than that because the frictional forces of the bearing and the air will slow it down. you can combine all frictional forces into an overall coefficient of friction. you can get the drag coefficient for a stationary spinning wheel from an engineering data table, and you can get the coefficient of friction for that bearing from the supplier (or just do ceramic on ceramic). my WAG would be the actual rotational velocity maximum after friction is probably 80% of the frictionless value. The slowmo doesn't actually tell you the whole picture though either. it appears to be spinning 3 frames for full rotation, but you could be spinning a lot more than that. the sample rate of the camera could be relative slow such that the wheel spins multiple times per frame and simply shows up in a different location. there are a LOT of formulas for calculating and accounting for this to try and get a range of possible values. also the frequency is going to be tied to the density and volume of the disc, so it wouldn't map perfectly to the aluminum disc
They can make a step on a wheel with smaller radius and point a water jet on its surface. This would make it spin faster and the outer radius wheel surface may indeed break the speed of sound then.
Holy shit man You deserve your own show!! This is awesomeness🎉 You sir have just gained a huge fan:) Not like a fan fan, a fan😅
my guess would be the tachometer functions on contrast to generate a differential pulse wave, then just spits out pulses per second to pulses per minute to get RPM, the blue anodization may have hindered the contrast (red laser), so maybe try a white spray paint and the sharpie black line, a wider black line may be beneficial because at higher RPM the contrast would produce a fainter pulse signal for a thin one with respect to the sensors sample rate.
or anodise just half very dark....
At the speeds they're trying to measure itd probably be best to do half black non reflective and the other half white very reflective. That way instead of trying to catch a quick blip the meter has half a rotation to sense the change in intensity. As long as its capturing one up and one down level change per rotation it will remain accurate. Also, itd be a helluva lot easier to deduce on high speed.
Im sure the harmonics would be completely different between the materials and bearings used. The pitch used between them for estimates can't be reliable
The right way to do it would be to take samples from different parts of the video, find a part where you could measure it with the tachometer, and watch the corresponding line travel left to make sure you are tracking the right one. Picking out "maximums" on a spetrograph is kind of bullshit.
Yes, the drag on the wheel exponentially increases, the faster it spins. I would not rely on the tone of a wheel of a different material to estimate the speed of the Ti wheel. Measure it optically. If you have to, use an oscilloscope to probe the IR photodiode on your chinesium harbor freight tachometer, then count the frequency with the oscilloscope. Adjusting the position of the wheel vs the stream might help you in two ways 1. Optimizing the momentum transfer from the water to the wheel by 1a. Getting as close to tangent as possible without 1b. Reducing the amount & duration of water contacting the wheel before flying off 2. Reducing the friction on the bearings by reducing the downward force from the stream (the closer to the center of the wheel = more radial force & friction on the bearing and the less torque/ tangential momentum transfer to the wheel). Probably the best thing you could do to make this experiment easier is scuff a stripe on the wheel to reflect, sharpie the rest black. Setup your chinesium tach on a chinesium tripod, tap into your chinesium tach photodiode, connect an oscilloscope, monitor from a safe distance. Then start playing with your... Position of the jet. Then you're set. Bet.
Great video man. I wish I had access to a shop and materials to do goofy fun stuff like that.
Where did the original guys go?
Gone, reduced to atoms
Sold the channel
They licked the wrong substances.
Yeah wtf I really miss them
Retired I guess?
If you're gonna keep bumping up the RPMs, you'll need a better measuring method. Get a very small disc magnet, drill a hole in the side of your wheel (not the circumference, it'll get thrown off, just the side, as close to the bearing as you can to avoid imbalance), JB weld it in, balance it, and then use a read head pulled out of an old tape deck, hooked to an oscilliscope, to measure the speed of the wheel. An optical tachometer just isn't gonna keep up at these speeds, although you may have better results spray painting it black, and then adding a retro-reflective white strip.
instead of a tape reader couldn't you just use any inductor or even a piece of coiled copper? the charge generated by the magnet could be detected by an oscilloscope, and since you basically made a monophase generator, you could measure the frequency of the current you generate, and instead of embedding a magnet which could cause imbalance you could electro-coat a part of it with something ferromagnetic
another idea would be to find a way to couple the wheel into a car alternator, that way you already have everything built into
@@eduardopupucon Sure you could, but a tape head has the advantages of being readily available, cheap, and most importantly - has a really high frequency response. You could use any old coil of wire, but at 100khz+ ... well I'm no electrical engineer, but at some point you'll have to actually think about the design of your coil so that it can actually produce a signal at those frequencies, and why bother doing that when you can use one where someone's already done all the work for you?
It's better to treat the magnets like a small generator, whatever wattage you get out of it can be measured at lower more accurate speeds, then that wattage number can get you a good estimate on how fast its turning at higher rpm, works for 20k rpm liter bikes at least
Do you put any classic cut in the waterjet or just run pure water? Have you tried the opposite (with/without the classic cut). Also do you use any sort of softener in the water?
0:57 strong bad fqhwgahds reference???!! as a former homestar runner addict you got me good
It's not a waterjet channel video without a taste test. Good job.
I wonder if this sort of thing will end up being turned into an actual manufacturing process to go along casting and stamping ...
Make sure it's perfectly balanced, I could tell just from the hand spin it was off balance since it ended up swinging back and forth around the heavy side. The imbalance is going to cause the bearings to wear unevenly and cause more friction. Use a hobby propeller balancer to get it as close as possible to perfect. I would also suggest rounding off the corners and trying to shoot for a flattened sphere shape to avoid air turbulence. Good luck!
I just commented that the heavy side is the bottom which makes it act as a pendulum. Knock a couple grams off until it goes away. Its typical to see a bunch of drilled out spots on engine crankshafts to balance them. Same could be done here. Just drill or mill off a little bit of material.
I like manganese alloy and would love to see a wheel made out of that put in the water jet. It was first used to make wagon wheels and now it’s used for concrete mixers and military helmets. I’ve seen it destroy drill bits trying to bust through, so I’m curious if a wheel made of this not only would achieve a higher speed but tolerate the spinning force way better.
Haven't seen Strongbad in a hot minute
RIP Dr Pepper who made the ultimate sacrifice for this video
2:30 I think it also helps that they're constantly showering the workpieces in hundreds of liters of coolant per minute
Ok I subbed this is cool..hope it gets better
I think fully precision machining the wheel is gonna end up being a needed step to really optimize it, that oughta get some interesting results! And I wonder if machining a groove in a resin wheel and then encasing wire might be cool? That’d be a fun comparison to this wire one! Ye could even try making a batch with different material wire, maybe?
"How do we measure that?" With white tape or paint. Damn. Also, SURELY you can set up a safe system to read the RPMs without having to run up to it after it's already slowed down a bit. Danger isn't entertaining regarding these types of tests...at least not to me.
Pfft, the entertainment level is directly proportional to the danger level.
This whole video gives off unintelligent energy.
Finally, someone tackling the BIG questions!
Love the slapstick interludes, lad
you could cut out a little tab/wing on the side of the wheel that will receive air resistance instead of water, possibly allowing you to test the sound barrier idea
That might work. It is spinning, though... You would probably have to make almost a small cupped indent on it to catch air so it can compress. I do wonder if that would work, though... 🤔
@@yourbifriendaspen3629 I feel like the drag would prevent him from getting to the speed required, I don't remember where I saw it but doesn't drag increase with speed? If that's true then in that case it might not be possible considering how fast it's going.
@@DoubsGaming I'm not sure, actually. It's definitely affected by speed, though. I'll look it up
@@DoubsGaming yeah, drag increases with speed.
@@yourbifriendaspen3629 it will increase but with testing there might be a sweet spot on size of resistance
Check out the fitting of bearings on good downhill longboard wheels. Bearings are always a super tight fit. Also taking advantage of how durable titanium is, you should hollow it out a bit. Like a titanium whiffle ball. I think the groove it cut in those resin wheels really affected how it was spinning.
You have few things you need to work out with yourself but other than that you are somewhat entertaining to a guy who never smiles. Take that as a compliment...
Holy Sh*t you just made me so damn happy with the "Will it Blend?" reference.
Try using a fan to clear the water mist Also, thread a reflective bolt into the side so you can get an accurate tachometer reading.
that would unbalance the wheel very badly and would increase the mass. Both of those things would yield much lower RPM.
@@Sharpless2 Drill the side, thread it and insert a bolt. Cut it flush and do the same on the other side at 180° to keep the balance. The cut bolt end could be painted to reflect the laser tachometer.
@@locouk why put painted bolts in the wheel? It is much easier and more effective if you just use black spray paint to make the whole wheel black and then paint a quarter of the wheel white
@@Henning_S. Easy, cheap, and will work a treat. I think many are overthinking this.
@@locouk The bolt will definitely have a different density to the titanium so that would unbalance the wheel a lot
Make a wheel out of sodium metal
have you calculated the water speed to know if with this pressure it even possible to acheave soun barrier
Loved how you ground extension cords.🤣🤣🤣 How many psi do you have to have to cut sandstone?
Have you spun nickel metal yet? Would also be cool to see the titanium wheel lightened up and see if you can increase that spead. Maybe Nurle the outside too for extra friction with the water and media. Awesome video, now i need to convince my company to let me try some experiments 😂
Nurgle!? Heresy!!!
Ok that was really cool
10:11 If you had the world's first 100% energy transfer device; which would technically be breaking the rules of thermodynamics simply by the small distance.
Some bullets spin close to 300,000 RPM in flight. It's crazy how they stay together without exploding as soon as they leave the barrel.
I got about 56300rpm using a spectrum analyzer on the audio. 1 rotation = 1 period/rotation. It made a fundamental tone at roughly 938hz * 60.
Next time use Liquid Paper. A black Sharpie over a dark surface won't work.
The strong bad reference earned you a new sub. [:
There is a fine line between genius and insanity, good luck with your travels
I broke the titanium rods in my back😅
Is that where your name comes from 🤔
@@WaterjetChannel yes I got tired of hearing myself say it
if you were to machine rutts in the wheel you may get higher speeds since the water has something to grab
Guys you are aware that Turbos rotate at 100k to 200k rpm
How fast things in the wild spin 😂😂😂 ya got me on that one, haha
Does anyone know what happened to the original hosts of this channel?
damn thats fast
first video ive seen, next level commentary
If you continue like this the universe will implode
The Cheat is to the Limit, cmon fhqwhgads .
You know me...
nice job 😁
Love the strong bad reference!!!!
5:28 Interesting fact: In high-power rocketry they mix titanium sponge into some of the solid fuel motors and the result is a beautiful shower of sparks from the rocket as it blasts off into the sky.
It's just not the same without Licky & the Bald Guy... rip
Then go find something else to watch ?
I forget. Where did they go?
@@poisonapple15 never said, one youtube comment source (saying they work with them) said that they got promoted. not strong enough evidence though
@@Decodeish1 Ah ok :/ thanks
@@poisonapple15 they have their own car channel
Love the strong bad reference
Can you adjust nozle position to not cut wheel when it expand? Maybe it can help with archiving higher speeds on more flexible materials.
I'd much rather watch *you* wrestle with that stuff. Thanks for the work so we could watch this.
0:10 I laughed way too hard and I have no idea why lmao
it did not read the speed because of the color diffrence , you can glue a white paper with a dark line on the side of the wheel. (tho in this case the water wouldnt help much.) laser readers work much better if the line is much darker than the surface , but in this case theres not much you can do but paint the wheel white. a white line would probably give somewhat innacurate reading duo to the laser being red .
Sounds crazy! Use 1/2 white and black too see it better. Love the video
I didn’t like how few cuts i had on my hands so i decided to change that😂 genius!
This is the thing that keeps me up at night. 😂😊
If the wheel was a cone shape and you could move the point of impact from the big end at max RPM down to the little end it will go MUCH faster. This is due to the impact point being closer to center of rotation....like a figure skater pulling in his arms. Physics is fun!
Might drill small holes into in the side and through the wheels, taking out material to lighten it up and also creating a surface that you might be able to get a reading. Just make sure every hole is precisely located to maintain balance.
7:17 nice pun with the earth/ground wire!
When I saw the 1st video with the wheel stretching, Ive always wondered if it would be possible to stick something in and turn off the jet so the wheel closed around the the axel and the object and what would happen. Would the wheel throw it out? Cut it like an inveted saw or snap it? Or maybe it would stay in? Would be interesting to find out.
You should machine a spot for a magnet and use a hall effect sensor to get the rmp. It would also be really cool to see the power you could genarate from it.
Was not expecting a flashback to my childhood 1 minute into a water jet channel video
From someone that used to be a cnc machinist that worked with Titanium we used coolant / lubricant in all aspects , Ban saw had coolant/lube , As did the lathe and Mill and even then sometimes the machine would still catch fire if the coolant/ lube level was not paid attention to over the runs. Yes Titanium burns hot and it even requires a special extinguisher to put it out.
when you used the titanium shavings as a moustache, i subbed
how can u measure by sound if u break sound barrier
Ik the power wheels video is old but can you do more upgrades like you said in the video and maybe even make it faster ?
Did you use the same bearings with the aluminum wheel? Guessing that's where your getting most of your sound from and the wheel just amplifies it, so the sound from one is unlikely to be the same pitch regardless since the wheel material differs. Just a thought. could also machine a line in the titanium wheel that won't wash off, then maybe the tach can see it better.
I think if the jet can move slightly so that once it’s spinning fast, you can make the jet that it only hits side of titanium. May get that speed. Nice video, new sub. ✌️
the wheel sounds like a jet engine powering up when starting to spin
What you can do is cut the titanium wheels front to a slight conical like face instead of it being flat so that as the waterjet spins it the more in it goes to the center the faster it'll spin (may possibly break time and space with this method lol). Great video!
Imagine causality being broken, not by physicists in a deep dark secret lab, but a couple of dudes messing with a waterjet when the bosses back is turned 🤣
Okay so after a brief scroll through a handful of comments, heres the suggestions I think would be most interesting to see put together Firstly, dont annodize the wheel because that will make it harder to see the marker line. Also, as a part 2 to this one, use a white or other more vibrant color marking on the wheel Second, aim the waterjet further away from the wheel's center Titanium is much harder to gouge compared to aluminum, so if you hit the wheel closer to the edge, itll spin faster (in theory) and still wont gouge. Third, I saw this interesting suggestion of making a wheel out of Magnesium because of how light it is, and then using a layer of Titanium to encase it for added strength. In theory, not a terrible idea, so maybe try that alongside a completely titanium wheel.
Assist with air and paint it black with a white or silver mark to measure RPM . Get fingernail polish that matches the silver tape that was supplied with the tachometer. The air will serve two assisting properties. The motion and lower the pressure due to that Bernoulli thing.. You could also use an air bearing for reduced friction. Make a steel spool that fits the profile of the titanium and pump air out of the center of the spool. Replace any grease the bearing might have with WD-40. Good Luck
I enjoyed the recap at 1:49 And the joke about needing a water jet 😂😂 I didn't know i wasnt subbed but after our lesson in French at 3:50 i checked and was not. Am now. Good stuff. Funny good. Love from Kentucky.
Wouldnt the sound frequencies be different not only because different bearings were used but also because they're different materials? Or does that not matter or did you guys account for the material differences?
Thank you for the Strong Bad reference.