Instead of the solenoid you could use the speaker driving coil directly. It will also move the blades sinusoidally instead of triggering them only on or off like the 'noid does.

@isaiahhiggins

3 ай бұрын

I think in this case, since he's driving the solenoid with an audio amplifier, the solenoid is moving sinusoidally. The more current that passes through the solenoid coils, the more it deflects against its spring. But I think it still cuts off half the waveform, so you're right, a speaker coil would be better.

@speedbuggy16v

3 ай бұрын

@@isaiahhiggins this, he is only getting half the waveform, big, I mean HUGE voice coil surrounding the shaft with the magnet incorporated into the spider would give the full waveform pushing and pulling air with a neutral point for the blades. If at that point the mass is still a problem mount the magnet around the shaft, and the voice coil to the spider fed via brushes on a slip ring. ideally all that structure needs lightened and stiffened. Time to play with some Carbon fiber I would say, oh and build a duct around it, or even better incorporated into the prop ends as a pivot to not only increase the strength overall, but also boost efficiency. Awesome video!

@codures

3 ай бұрын

He could also go with 2 solenoid anti-parallel mounted (with diodes, fast demagnetizing, etc.). The other, more trickier, would be maintaining the solenoid at 50% load when centered. However, we can find multiple improvements, this physical swash setup doesn't allow proper sinusoidal response in the first place, last place being the blades bend/deformation when pumping the air. It's a very tricky design to get sinusoidal waveforms is an understatement.

@DanielvanKATWIJK

3 ай бұрын

You can use a solenoid but have to modify it so the iron is centered in the coil. In this way you get full sinusoidal wave form. Then center the blades so they can move "positively" and "negatively". This will not be HiFi but for bass effects it is close enough. Then limit the amount of movement from the blades, they really don't need to move much to get big amounts off air movement. The power is provided by the motor, you don't need a big amplifier to drive the pitch of the blades. Better is to use and old voice coil from a big speaker and drive the system like this with spiders to center the coil. Less parasitic noises. I have seen some kind of conception in an old theater. It was driven by a really tiny tube amp. It works only on frequencies below 20 Hz, event below 10 Hz it comes alive. It is not commonly used because the equivalent air volume is so big that to load it you need a room size baffle to house the system. It works in a chimney vented to the outside. Dis is how it was mounted in the theater, big pipe to the outside on the roof.

@tripplefives1402

3 ай бұрын

@@speedbuggy16v Without a stopper, the solenoid will both push and pull the rod in and out.

You need to use a solenoid that allows for more than 2 positions. This configuration only lets you play one note

I'm seeing more and more people discover and experiment with rotary subwoofers, and that excites me! It's such a niche device but so powerful. Didn't know you had shut down your old channel, and I'm glad the algorithm recommended your new channel, your videos are great! You explained at the end that there's a limit to how fast it can change pitch, but don't forget you're only using half of the wave with the solenoid. If you use a subwoofer driver to push and pull the copper sleeve, you should be able to reach 5, maybe 10hz continuous, but you'd need flat blades so you push and pull

I really like your down to earth approach. Just being a normal dude in his workshop screwing around.

Hey man I’ve welded copper to steel before too and that’s not a good way to secure anything that vibrates trust me….

@poppynokc1977

3 күн бұрын

I think what he welded it to was the bolt and washer. True statement though.

plans, specs, KITS!- more marketing , and OEM needed

Rulof never ceases to Amaze me, Every single Project is an awesome amalgamation of stuff no one has even thought of making. This is Precision Engineering Mixed with Chaotic Thoughts. Cant wait till you have the 5-10mil subscribers you deserve man.

PLEASE REMAKE THIS WITH A REAL SUBWOOFER REPLACING THE SOLENOID!!! 🙏🙏🙏🙏🙏🙏🙏🙏

man, when I found your channel I thought "thats one odd guy" but your ideas are really, really interesting, and the stuff you build is really quite good. you manage to actually build new and interesting stuff that works. Super cool, man!

Great job, thanks for sharing 👍

love your videos. Keep it coming bro. I like how you think and reuse stuff. Most buy new stuff for everything but you will reuse stuff.

More stuff about this thing, less rattle and maybe the fan connected to the normal subwoofer so you get the 30hz perfect and the fan does the under 30hz real low stuff

Pitch changer is also known as a Swash Plate.

Interesting work there!

Love it! You definitely deserve more subs :)

Really cool, Shows what some things in life can do. Yet original subwoofers are not beaten. always better

I really enjoyed this project and I’d encourage that you come back to it to add a bass box to it. The enclosure of a bass or subwoofer is crucial to its sound, the boxes usually have resonance in mind to allow you to get that amazing deep vibration you were wanting. It requires a bit if work with fluid dynamics and material resonance but this project can become a really powerful bass if you were to add some resonance. Love your content man, keep it up!

Appena trovato sto account in inglese che non sapevo esistesse. Ti seguo da quando ho otto anni fra mi hai ispirato tantissimo con tutti i tuoi video durante tutta la mia crescita. mi sa che avevo pure costruito un fucile a caramelle con il tuo video certo due bottiglia di coca-cola che dovevo pompare di brutto ogni due colpi lo rendevano leggermente inutile però molto divertente e me lo ricorderò tutta la vita. Ti ringrazio. Adesso ho vent'anni e faccio ingegneria aerospaziale in parte penso un po' anche grazie a te. Spero tu continui così con tutti i progetti che mi sorprenderanno sempre. Ti auguro il meglio. THIS GUY IS THE BEST I JUST FIGURED I SHOULD HAVE WROTE THE WHOLE COMMENT IN ENGLISH.

Ah c'est le même principe que quand on roule vite sur l'autoroute avec une seule vitre arrière ouverte , ça fait des basses 😂

One way to stay cool while listening to music 🎶

Dua for Extinguishing Fire that Prophet Muhammad Sallallaho Alaihe Wasallam said: ( Whenever you see the FIRE, say Takbeer "Allahu Akbar" because Takbeer extinguishes the fire)

You should have played "bass boost" feel the bass bass, feel the feel the feel the BASS BASS 🔊 😎

I'm sure putting in one more solenoid, setting it so that it makes forward and reverse contractions. In addition to making the tensioner much firmer without any play. You can get much better sound

Very very interesting, good job 👏, keep on going, u have a wonderful minds

this is so cool

awesome finally somone hasnt used 3d printed parts wish i could machine metal that good

@rulof-is-how-to-make

3 ай бұрын

ive usead -weerg that is a cnc service online

@angusmcgil

3 ай бұрын

im almost positive youll need to remake the blades out of metal there cannot be any flex at all ,and i think you should wind your own huge chucky voice coil along the shaft ,as the solinoid is trying to lock the pin in which is counter intuitive@@rulof-is-how-to-make

@angusmcgil

3 ай бұрын

the solinoid has thick windings but you need lots thin thinner windings .using the voice coil from a dual voice coil subwoffer will work good too

@angusmcgil

3 ай бұрын

ive only seen one audiofile grade rotary sub and it was like 100,000 or something stupid like that but it was so good that the motor and the blades were silent when spinning with no music and when the music played there was no air noise only the really low hz and the blades on that were quite thick metal

Nice video man. Keep it going. I have a suggestion. I think you can get even better results if you could vary the pitch continuously rather than it being fully open or closed.

@rulof-is-how-to-make

3 ай бұрын

depends on the "song" but i have to test it! thanks for the suggestion!

@zwmmxviii6851

3 ай бұрын

​@@rulof-is-how-to-make I think with variable-pitch propeller RC helicopter, you could do exactly this. They respond very quickly to input and can be very powerful. The biggest concern would be overheating the servos when articulating very rapidly. But the RC helicopter might be up to the challenge of getting 1- 60hz response. Then it can be used in addition to what you have created here to supplement the frequency (since the volume would likely be lower than this behemoth since there is less torque from the RC motor). 👍

rotary subwoofers always excel with very low bass. anything lower than 30 hertz. Fun fact the human ear doesn't really hear 30 hertz well. Secondly if you made a port for the fan you could improve the sound clarity. Overall great video on the basics.

This can be improved. The hole in the door would have to have less clearance, ideally like 3 mm on each side. The "brackets" (twisted on both sides pieces of wire) have a lot of slack which makes the subwoofer noisy and less efficient. Finally, the solenoid is a bit "aggressive". Its output can be described as a square wave, but you really need a sine wave.

@rulof-is-how-to-make

3 ай бұрын

i was scared abot clarance and vibrations... chat someting collide.. :)

Not only a membrane weight counts. But an amount of air displaced by the membrane multiplied by a factor which depends on a cabinet architecture (Qms mostly). This dynamic weight can be x1000 heavier than a membrane weight. So.. Recycle the solenoid, cause it has nothing in common to a sound, and try a "normal" coil + a magnet. A blade must have a special shape, so it returns to a neutral point with an air.

You want as low a mass as possible to have move at audio frequencies. I would suggest embedding neodymium magnets into foam blades, or turning a shaft that runs the length of the blade, twisting, and making electromagnets in the hub, fixed (but spinning). You would need rotating collar contacts on the main rotor shaft. You can then match the impedence of the coils in the electro magnets you built to the expected impedance of an audio amplifier, typically 8ohms. If you use a stereo amp, you can use one channel to push and the other to pull by inverting one channel and use a second array of flipped magnets and coils. You need to put a low pass RC filter ( 2 or 3 passive components, maybe a variable resistor to adjust frequency) between the mp3 player and the amp, to filter out anything the speaker cannot handle, I'd take a guess at 100 hz or lower. The stereo signal has the same bass on each track, so if you're not using a stereo amp, just use one, you need a low pass filter for each channel. You really want blades with a symmetrical profile, and it's my guess you want to reduce the space between the blades and the hub and the blades and the rim, so you might need want to widen the non oscillating center of the hub and put a ring on the radius, so you're more confident getting it close to the hole.

Good video sir, please make a video on oxygen, hydrogen seperated cell if possible thanks

Theaters, Cinemas, and Recording Studios, use giant sheets of metal, usually 3meters x 4meters (or bigger) usually in a basement normally. Better than any Surround Sound or Subwoofer you can buy in shop.

This would be amazing for def people to feel bass..

You could space out horseshoe magnets, three in a circle, and three spaced out in a row (9). Copper coil the rod, and run the amp to the coil. That'd give you the full wave. I'd be like the Jackhammer woofer design. You wouldn't have to destroy a speaker. You don't have to have it at a window. You can run it under the floor, with open intake. This cuts the noise. Most bass is above the column of air freq. of the smaller area you'd have putting it under the floor. Most ppl don't want their lungs affected by a 1Hz signal, either. So, a movie or song would be practical with the floor setup.

Accent went crazy at 5:10😂

Hello, man, thank you for sharing your project, I also made such a fan, built around a hoverboard motor, but I did not get any subwoofer pressure effect - and I found the reason in your clip - I do not have yet the separation plywood that should separate the two "rooms". I see a problem in your design - the rotary plate that adjusts the blades should spin free from the main axle, but it should not move relative to the blades plate - otherwise the push-pull motion will partially get lost by the relative motion of these. Also, those bent wires have a lot of lag against the bolts - and again, you have mechanical loses there also, you should make some ball joints there. Also, I suggest you build the solenoid around the main shaft, just attach some neodymium magnets to the sliding plate and just add 1mm copper wire coil in front of it. Great and simple presentation!

You should've put heavy springs on the cylinder instead of a dead stop so can also move forward more for certain frequencies.. I think having it equally able to move forward and back would be so much better.. But I'm just a kid what do I know.. Awesome video

that's a lot of power for only getting half the wave too D:

imagine being in the Army and reprogramming a helicopter rotor to play trap beats 😂😂

Could You use compress air, and some valwe as a sub, to play music?

Thinking on how to accomplish this I wonder if releasing compressed air can be done quickly and accurately enough to give the sound better quality than trying to actuate the heavy moving fan parts? Or perhaps rather than releasing the compressed air entirely it could be utilised as the actuator and be filling an air sack in a box with a hole in it? I know you'll solve this one way or another! Good stuff as always :)

Check out the Thigpen TRW17 it is basically what you built.

That's cool and all but that celenoid doesn't go fast enough id recommend you check out other videos on diy rotary subwoofers people have solved the mass problem

You should redo this video and tighten the part so to not rattle like with this one. Also using an actual speaker coil would work better imo

motor is now a Giant transducer. the REAL bass is At the Motor. You need to play the music with a delay for the Bass, to Play it to the BASS, 1 sec before its from speakers.

Try one of those variable-pitch propeller from RC helicopters? Or even a whole helicopter; program the controller to the music and the helicopter could fixed in place. They responded nearly instantly, controlled remotely, battery powered (could be hardwired since it will be stationary), very powerful motors (both internal combustion of various fuels and electric ones are made), plethora of blade designs available or custom could be made, (they are expensive for strong RC helicopters)... But this seem ideal for your application.

use the speakers coil instead of a solenoid

bul bul ki tul mam ma tune un da 😂

Slightly works at producing a half square wave every two seconds… but that will it never reproduce a sound track from music or movie sound track. Install stone bearing or at minimum brass bushings & key the hub for the transfer bars…. Perhaps it’ll last longer than a week. Def a cool build to troll the surrounding houses, add a keychain pushbutton remote so you can stand outside and ask hey where’s that thumping noise coming from while pushing the remote in your hand. 😈👹

use a magnet on the solenoid shaft instead of the steel block so it can move bidirectional like a normal speaker, and adjust the amp output to not clip

@rulof-is-how-to-make

3 ай бұрын

thats a great idea! thanks!

never light a candle. turn on the candle. 😂❤

Subwoofer my dude.

💖

can you recreate phoenix gold cyclone

I love the execution of your plan but due one oversight, this thing will never work at anything higher than like 4hz, because you're using a solenoid for actuating the fans, the solenoid is just like a on/off switch, there's no inbetween so it cannot oscillate or vibrate like a real speaker, a speaker's coil goes in both directions, inside and outside, you'd need a speaker to actuate and oscillate the fans for it to have any sort of actually bass response, as of now it's a giant air pressure changer. I'd love to see you come back to this project in a future video and try using it with a real speaker, I've seen some videos of other people using it with reall speaker to drive the fans and it works really well.

❤❤❤❤❤❤❤

Couldn't you replace the Solenoid with a Speaker? you Glue the cone of the speaker with the rotor spero si sia capito in inglese, nel dubbio: se attacchi uno speaker al posto del solenoide e gli fai ripordurre musica non dorebbe essere possibile far "sentire" la musica. ovviamente lo speaker dovrebbe essere in grado di sopportare la massa di tutto il meccanismo

I’ve been super interested in these, but never found somebody playing with them with this level of innovation and creation. This is awesome.

u should duct it lik an edf

What about the audio winder???????

@gostoso181

3 ай бұрын

Up 🤣

@user-tj3qp5ye8o

3 ай бұрын

Avn tune un u gantl ganta

Ha! Where do you dream up your made ideas! 😂

@roxasparks

3 ай бұрын

Old idea, but a bunch of people have been building these alot recently

Use a proper voice coil.

Rulof i zio can ,italiano linguaggio plis

Please make a RDE

This is an impressive creation, but not a good rotary subwoofer. A binary solenoid is not a good control mechanism and the system is too large and massive, as acknowledged near the end. You can make these subwoofers follow musical waveforms and produce frequencies much higher than this one and there are examples on KZread. They can be powerful enough to damage your house or things in it ;). Your spouse and neighbors might not approve.

Moist

PLEASE DOP NOT USE A SOLENOID - USE A SUBWOOFER!!!! (se my comment under the most like comment's reply)

Dude needs to get off camera and have a hott woman explain.

Doesn't work.

A fan can't be a "speaker", this doesn't make any logical sense and there's no way this could possibly work. This is obviously fake and any bass sounds it did apparently make are just dubbed in. Proove me wrong, unless I see one of theese in person I will remain skeptical. Also I wouldn't want a speaker system that constantly makes a lot of background noise.

@isaacmurray8490

3 ай бұрын

I’m sorry, but you are very incorrect, it has to do with physics and this is actually a really good project. The base sound from the song he played was just overlay but he did adjust channels to allow the base he made come through. Research videos if helicopters running and listen to the noise they make. I really do enjoy a good laugh though, friend, thanks for a good joke 😁

@isaacmurray8490

3 ай бұрын

Also, in reference to background noise, the only reason you wouldn’t want any background noise is because you don’t want to have ti fight to be star of the show, and in case your small mind can’t comprehend what that means, i’m saying *you* are background noise. Hope you like being a hater because it really gets your thoughts heard, huh?

@CoolDudeClem

3 ай бұрын

@@isaacmurray8490 It's not a joke. This defies physics, maybe not in whatever reality you live in though, maybe the laws of physics are different where you live. I connected a fan to a big amp I have and guess what? Nothing! It wouldn't even turn.

@isaacmurray8490

3 ай бұрын

@@CoolDudeClem wooooowwwww. Aren’t you a genius then? I’m surprised that troll’s law wasn’t taught in my college physics classes. Maybe i forgot but it has to do with the fact that he connected the solenoid to the controller? And I believe that speakers work by creating vibrations in the air based off the frequencies in the electrical signals created by that controller, then according to the laws of fluid dynamics, those waves are carried spherically outward from the source. Then, at least where I’m from, we can hear sounds with our ears that catch those waves in the air. Maybe the fact that, where you are from, physics doesn’t exist is the cause for your lack of logic and reasoning.

@n0tlance314

3 ай бұрын

That's why it's a rotary *subwoofer* and not a rotary *speaker*