Working at Lawrence Berkeley Lab in the Bay Area, I was tasked in the 1980's with making a hollow spinner that would run at 300,000 rpm. The spinner was of Excel plastic, along with the housing. Clearance was about half a thousandth, and the spinner did get up to speed, with air bearings and a slots cut around the middle. I looked at several dental hand-pieces to learn how to do this. The limiting factor was not air pressure, but the limiting speed of air going through a nozzle. The nozzle was .012 at it's smallest diameter, machined by a tapered reamer.
Nice machining footage. I have two suggestions: 1) Up your flow. Seal up your air intake port better and check for bottlenecks in your air system. (1/4" fittings vs. 3.8", etc.) It appears that you are bleeding a lot of input potential. 2) Did you machine off / check for disc runout after installing the axle/shaft? It occurs to me that any imbalance at all would severely affect efficiency at high RPM. Thanks for the video!
very kind of you giving credits to JohnyQ90, he is very inventive, and has pretty little equipment in little Greece... great success, i congratulate you!!!!
Very nice! I’m surprised you ran it on it’s side with a standard ball bearing, they really aren’t made for much axial load and roll easier when the load is radial, unless it’s one of those funky ones made to take simultaneous axial and radial loads...unless - does the air turbulence keep the rotor centered?
I don't hear it reaching the resonance between centripetal and centrifugal forces, can you make that thing spin faster maybe with a higher pressure? Btw, the centripetal and centrifugal forces I mean are the result between air flowing from the outer side and forced to go out from the center, and the air that's being thrown away from the center by the discs themselves. When that happens both the forces act as a single force over the discs and make the rotor spin at the speed of the airflow.
Have any hobbyist and/or youtubers made a Tesla turbine that uses air-bearings instead of ball-bearings? I wonder if that would be a significant improvement in raw rpms.
I think you should get a bigger compressor volume, and try this again. The RPM was still creeping up, in other tesla turbines i've seen this is normal until it hits a specific RPM then suddenly it will get quieter and rocket up in RPM, that's when the turbine is running efficiently, you're losing a lot of energy to vibration when the air noise drops the airflow becomes laminar and the majority of energy is being transferred to the rotational energy.
What do you think of the work being done by Paul Townley (Grav Inert) with the Tesla Turbine patent? He claims to have worked out and understood a series of Tesla patents that when combined together create a super sonic Cold Steam machine Tesla turbine. Essentially natures tornado connected to a shaft with its fuel source as that of only the air around it. ie the compressed air isn't required, it will feed itself when taken to subsonic rpm speed from the air around it.
I have a serious silly question.. What would happen if you used hard drive discs instead in this turbine. I just thought of it seems silly or is it.. they are slick and smooth and perfectly round..
This is obviously very cool. However, I have been wondering just how can this tech be used? I've been aware for a long time that this exists but fail to see a really good application. I would appreciate some suggestions. Thanks.
If used within a cryophorus loop the cold steam flowing to a condenser can spin the turbine, with a difference in temperature maintained between the cold steam and condensate in theory you can harness the flow to generate electricity
this is awesome! i was hoping i saw the almost 100 percent efficiency mark i saw on another video where the rpm went to 50k to 70k in almost an instant. but still this is reallllly cool
This may be off topic, but someone might find it interesting. Over unity electric generator. By AMA. Segment 1: 1 motor with bar connected to it standing vertically. Circular disc connected to bar that has magnets embedded in it surrounded in high permeability material to focus magnets outward pushing force in an upwards direction from top of disc. Segment 2: Hollowed out cylindrical Bar of material horizontally positioned. Flat hollowed out ring shaped material with openings around its outer top flat edge. Magnets surrounded in high permeability material embedded in these openings. Magnets positioned in openings around ring are in at least 1 of 2 configurations either all N magnetic field pushing out or N,S,N,S all around it. Just depends on whether your going for Piston structure or spinning structure explained below & whether you want it to be DC or AC current. Place these all along the cylindrical bar connected to it solidly, except at far ends of bar. At both ends of bar place ring of material that can be magnetically repelled in specific locations. (magnetically repelled in specific location is in reference to outside of ring area that faces away from center of bar)(Other side of same ring facing in towards center of bar is capable of being magnetically repelled all around) Ring must be connected solidly to bar. points of repulsion on these rings is off set from each other on each end of bar. 3 Hollow ring structures with small square bars protruding from each. Ring structure has all magnetic repulsion on inside of ring shape & can rap around the main bar so that the bar wont be causing friction on things as it moves back and forth or spins. 1st positioned around far left of bar, 2nd position at center of bar (be sure to leave enough room for magnetic structures to be able to move back and forth without hitting it) & 3rd positioned on far right of bar. Tube structure is constructed in two parts that fit together on top of each other length wise over main structure. Tube structure has 3 square openings for the bars that the Ring structures that are connected around the main bar keeping it from causing friction on structure, to slide into. This tube structure is designed with material that does not block magnetic fields. Perhaps some type of transparent material glass or other. At both ends of the tube structure there is a built in circular groove that will house a round disc. The ceiling/floor/left side/& right side of groove has openings for small magnets to be embedded in it, so that the pushing force from magnets is pushing in towards the edge of disc that goes in this spot. There is also 4 openings located on the top, bottom, left & right positions of the open groove. Small magnets are placed in these spots so when round disc is in position these magnetic fields will hit sideways keeping it from generating friction against structure. Far Ends of bar has Cap structure that screws over tube halves holding them together. Cap structure also has 4 points on inside top, bottom, left & right that have openings. These openings have small embedded magnets in them that exert there pushing force outwards (sideways) so it will keep disc in position, generating no friction against structure. Cap is made of material like tube so it does not block magnetic fields. (Note: These magnets in groove and cap structure are only needed for piston design. If Disc is directly connected to main bar so as it spins the bar spins, magnets are not needed here). The disc has ring around it (ring of material goes around outer edge and folds over front side & backside a small distance) that is repelled by magnetic fields so the 12 small magnets will keep it lined up but it will be able to spin without causing friction on structure. The disc has openings on it's flat side that face inside of tube and magnets surrounded in high permeability material are embedded in this disc. The disc has small bar that is connected to it's center that goes all the way to the other end of bar structure through the center of the hollowed out bar and connects to disc on other end. Disc on other end is set up the same but magnets embedded in it are off set in comparison. As first disc spins the magnetic fields will push against specific spot on disc connected directly to bar, pushing bar in other direction, once bar is fully pushed over, further spinning of disc will then align the other sides magnet to push it back. Tube structure also has half moon shaped protrusion on inside and on both halves so when tube is connected they line up to make a full ring shape on inside of tube, these half moon shaped protrusions have at least 1 small round opening on it's side in middle of curve that faces away from center of bar. The opening has a small magnet embedded in it so magnetic force is repelling out sideways away from center of bar. The protruding ring is positioned to line up slightly further in towards center of bar then the ring of magnetically repelled material connected directly to bar. This way when bar moves right or left it is magnetically stopped after a short distance. Copper coil setup: Copper coils are wound in at least 1 of 2 ways. Either coiled in circles next to each other (Like if you wound coils around a cylindrical bar) or laid out in a row as if wire was on flat table going up then bent to go down & back up until it formed a flat rectangle of wire bending up and down and then the entire structure folded around tube. Copper windings are then lined up perpendicular to magnetic fields on outside of tube. Ends of copper coils are connected into separate construct that will allow electrical current to flow somewhere else. Circular construct is built like a stand that goes around the outside of motor segment. Circular construct has flat ring of high permeability (magnetic field shielding) material that has small openings that will allow magnetic fields through specific locations. Top of circular construct has groove to allow the horizontal bar to balance on. Circular construct can also be placed on other end of bar so it is balanced. The motor segment is positioned so the disc connected to the bar that is connected to the motor is lined up so the disc passes under the horizontal bars disc that is at end of horizontal bar. The high permeability material keeps the magnetic fields in disc from hitting into the disc that spins or pushes the horizontal bar until just the right moment when the impact will cause the disc in horizontal bar to spin which will perpetuate the piston motion in the horizontal bar. More horizontal bars of the same design are built and positioned around the motor segment in a circular horizontal fashion all the way around. The bar connected to the motor can be increased in length to desired height (As much as motor can handle) and more of the exact same setup is repeated higher and higher up, maximizing the over unity potential of the construct to ridiculous proportions. :D Current from the horizontal bars is diverted to power the motor as needed and all other current is diverted to power my game console or the world. :) Interesting variation to this design would be to connect the spinning discs on far ends of horizontal bar to main bar that magnets are connected to so the magnets spin instead of getting pistoned back and forth. So long as moving magnetic fields are perpendicular to copper wires it should work. By AMA
Does anyone know if a Tesla turbine has been used a high speed spindle in PCB drilling or PCB copper routing? I see PCB air turbine spindles running at 100,000rpm, but I don't think these are Tesla turbines.
What type of lubrication for the bearings? I'm wondering because I figure much of it will be flung off by centripetal forces, and the super-high rpms is likely to create a fair amount of heat?
I could lie and say I used a special bearing oil, but actually I went for the high tech solution of 3-in-1 that I found under the kitchen sink. In fairness, it worked really well.
Thanks! Good to know. I suppose it doesn't matter that much. Just being silly: I wonder if lubricants for dental drills (also insanely high RPMs) or car turbos would make any significant difference.
David, Just saw this and must say; Very well done videography and build. Enjoy JohnnyQ's work also. There is also another YT person, PlasmaStar9 that built some incredible T-Turbine models a few years ago. I didn't see much in your video about the inlet nozzle setup and curious about your methodology regarding angles and nozzle types. Pretty impressive speeds at 8-10 Bar! Also enjoyed your attention to detail during machining, like moving the chuck to the mill. Sub'd and looking forward to more. Thanks for sharing your work here! ~PJ
Thank you, I really appreciate the feedback. In the video the inlet nozzle was just the end of the air gun. But after the video I tapped the hole the air gun was pushed into and made a brass nozzle with a 3 mm diameter hole. It made a huge difference for the better in performance
How can we make use of this engine and whether it is economical and provides a large amount of air to take advantage of it and can be operated in this way an electric generator by air and thank you and more
I think you may be driving it the wrong way. Centrifugal pressure pulls air from the centre to the periphery, so I think you should have the exhaust at the periphery.
Assuming you're right (you're not, just look up Tesla patent) how would the applied pressure/working fluid create rotation on a hollow shaft? Entering the input through the center would be applying the drive energy in the same direction as the hollow in the rotor. There would be no differential for the fluid to create rotation.
Good job! Its importatnt to note the British Patent 179,043 - Improved Process of and Apparatus for Production of High Vacua should be put on either side, your efficiency would boost up to 50% We are experimenting with this now. Nikola Tesla says this himself in the patent.
You mentioned having a client, do you routinely fabricate custom works? I've been studying the Tesla coil and compressed air engines and would like to convert but lack the workshop, tools and resources to build everything myself. Do you have business cards?
Hello Ben. Working as a machine shop isn’t something I’m interested in doing, but thanks for the comment and I’m sure you’ll be able to find a local fabricator to help you out.
Hi David, I tried to make something similar but it didn't work because I tried to machine the rotor in one piece using a parting tool for the grooves and I think the discs were far too far apart...how thick is the brass that you used?! Very nice video btw...I have the same DRO :)
If you assume that the air within the boundary layer has equal velocity to the rotor then you can use the equation: E = (1/3)*p*Pi*h*(R^4)*(w^3) to estimate the energy for each disk in the rotor. Where p is air density, h is the disk spacing, R is the disk radius and w is angular velocity in radians per second. From what I can tell in this video, the disks are about 6cm wide with a 1mm spacing, but I can't tell how many disks there are. From the theoretical model I would estimate that each disk is receiving about 62 joules of energy. Would like to see if this is consistent with the physical model.
Oh, I'm not David, I'm just a Mechanical Engineering student modelling the Tesla turbine with kinematics for fun. Going to make one with 140 rotors during mid semester break. The best way to find the input/output relationship for the physical model is to measure the energy at the intake against the energy of the exhaust. Hopefully David can do this for us then I can hopefully verify my model.
I agree, dev really outdid himself. I see this thing reaching 80k+ with a better input flow. I'd assume going smaller(to better match the clients request) would make machining accurate parts harder. 🤔 ...thinner, more smoothly polished friction plates maybe??🤔
what is the relation ship between the air's pressure / heat? And I wonder if 'choking' the engine slightly by either, reducing the internal cavity volume relative to the solid components mass / volume or restricting the exhaust port volume slightly would decrease max rpm but increse torque...
Good work but why not add steppers to the axis on your mill , costs nothing and you will be really helped. I have runned manualy and its hell compared to CNC capability. Its easy today. You spinn up the disks very high in rpm. IS it 304 stainless ? What do you think they will tolerate before go to peaces? Have you tried to let the turbine do work for time and how much power it can deliver?
Yes, CNC would make things easier, but for the day job I write computer software and so I picked this hobby to get me away from computers. If I converted the mill to CNC, I’d reduce things back to computer programming and that would defeat the point :-) As I made the turbine for someone who has a use for it, and they only needed about 20K RPM at almost no torque , I didn’t want to run it to destruction. The materials are either brass, aluminium, mild steel, and for the shaft titanium.
Aha is the disks around 50 mm, its what I guess on looking on the video. It means disks of hardend or stainless steal may tolerate 50-60 000 rpm. The concept is a very nice engine and think of such turbine in the car instead of the expensive innefficient heavy otto engine.
Did the user specify a load under which it has to pull 30K? 25% overspec running open throttle and no load isn't the most inspiring profile ever, but I don't know what kind of torque the user could possible expect at 30K anyway.
Hi Atlas - the application is a bit strange. But actually it needs pretty much zero torque and just needs to be freely spinning at 30K RPM. I think it would go a lot faster - but I didn't want to damage it given the amount of effort to make it.
Fascinating. Not fast enough for isotopic refinement of Uranium Hexafuoride, venturi horns would be more applicable for ventilation, could possibly run a turbomolecular pump stage but only at low volume, wouldn't be used as a medical centrifuge anywhere where only air power is had... I think my only reasonable guesses would be hooked up to a centrifuge for geological sample stratification or a niche plunge friction welder. I can tell you care about client confidentiality, but I still had to guess.
I'm always puzzled by why people feel like the rotors have to be made of metal. It seems like the lighter the material the better for that part. Thick aluminum foil or carbon fiber or even plastic (at least at lower rpm) seem like they might work even better than steel or brass.
The pressure causes thin metal to warp, it was one of the first an biggest problems when Tesla first made it. Carbon fiber might be a good option, as long as it is balanced almost perfectly.
Wow far from the truth, Its too efficient when up to speed, you couldn't make much money on something that doesn't wear out, it would save too much fuel, the oil companies would benefit less and this is why we use internal combustion engines.
The tesla turbine is one of the most efficient designs that exists, but it's torque is absolutely pitiful, which is why it has nearly no purpose. Additionally, the disks tend to warp as well.
I would like to know how much it would cost for you to make an exact replica for me. If you prefer not to make the same thing twice, I have a design that makes the turbine more efficient and you could try making that 👍
@@iEnergySupply didn't know you had a channel, great channel by the way,. But then why do we still use regular turbines if the Tesla terbine is more effective?
The torque is very low, so they are not really that much use for anything other than a few niche application or academic interest. Still fun to build though!
@@DavidCambridge Exactly true.........the theory is beyond comprehension for something that it is most suited for.......but it does have a purpose if only to show that it can be done......the limit of your imagination is exceeded by your ambition to go to the bounds of reality
Not to be unfounded I give the reference to video of my model of the micro turbine Tesla with a rotor with a diameter of 66 mm which gives 2,4 kW of electric power on the generator - th-cam.com/video/1_b28Wjs_NY/w-d-xo.html th-cam.com/video/S9ot2O1XX9Y/w-d-xo.html 1. Width of the main disks has to be less, or is equal to width of gaps. 2. exhaust windows have to possess a sufficient flow section (which is defined proceeding from mass flow of a working body and its speed) 3. The nozzle of the turbine needs to be calculated precisely proceeding from mass flow of a working body and a flow rate on escaping of a nozzle. The nozzle has to be surely located on tangential to a rotor, otherwise we lose a large amount of energy. The gap between external diameter of a rotor and a housing should not exceed 0,5-0,8mm, depending on the speed of rotation and stretching of disks by centrifugal force. Свернуть ОТВЕТИТЬ
Tesla Tech hi, I have a similar project for a 24KW alternator... I was wondering if there's a formula for the size, disk diameter and thickness and disk space.
![Making A Powerful Micro Tesla Turbine [Full Video]](http://i.ytimg.com/vi/iZYXeKVE_TM/mqdefault.jpg)
![Making A Powerful Micro Tesla Turbine [Full Video]](/img/tr.png)
This looks like one of the most successful Tesla turbines demonstrated on you Tube! Nice machining skills!
Nice work. I don't know why, but your soundtrack for "Test Day," put a smile on my face. Thanks
Working at Lawrence Berkeley Lab in the Bay Area, I was tasked in the 1980's with making a hollow spinner that would run at 300,000 rpm. The spinner was of Excel plastic, along with the housing. Clearance was about half a thousandth, and the spinner did get up to speed, with air bearings and a slots cut around the middle. I looked at several dental hand-pieces to learn how to do this. The limiting factor was not air pressure, but the limiting speed of air going through a nozzle. The nozzle was .012 at it's smallest diameter, machined by a tapered reamer.
Nice machining footage. I have two suggestions: 1) Up your flow. Seal up your air intake port better and check for bottlenecks in your air system. (1/4" fittings vs. 3.8", etc.) It appears that you are bleeding a lot of input potential. 2) Did you machine off / check for disc runout after installing the axle/shaft? It occurs to me that any imbalance at all would severely affect efficiency at high RPM.
Thanks for the video!
use better bearings next time....
very kind of you giving credits to JohnyQ90, he is very inventive, and has pretty little equipment in little Greece... great success, i congratulate you!!!!
A very well produced video and some nice machining too. Have subcribed for more.
Very nice! I’m surprised you ran it on it’s side with a standard ball bearing, they really aren’t made for much axial load and roll easier when the load is radial, unless it’s one of those funky ones made to take simultaneous axial and radial loads...unless - does the air turbulence keep the rotor centered?
I don't hear it reaching the resonance between centripetal and centrifugal forces, can you make that thing spin faster maybe with a higher pressure? Btw, the centripetal and centrifugal forces I mean are the result between air flowing from the outer side and forced to go out from the center, and the air that's being thrown away from the center by the discs themselves. When that happens both the forces act as a single force over the discs and make the rotor spin at the speed of the airflow.
Run it on in vacuum and on cold steam
The holes need to more like a rectangle port, possibly canted along the shaft axis.
Top notch job David. Good to see you back! You have such an under subscribed channel.
7:00: Is that Apollo moonshot radio chatter in the background? Way cool.
Could you put load to the shaft, to find out, how much power it can make?
this is the million dollar question for ALL tesla turbines. neat toy that has only enough torque to spit itself. never under load.
@@__shifty Yeap, nice toy, won't move any decent load, sounds pretty nice but is just a toy😁
Have any hobbyist and/or youtubers made a Tesla turbine that uses air-bearings instead of ball-bearings? I wonder if that would be a significant improvement in raw rpms.
What are some of the application of the Tesla turbine? Is it used anywhere currently?
So jealous of your workshop, nice work :)
So how do you get the air into a stream to make this efficient? Oxygen tanks?
I think you should get a bigger compressor volume, and try this again. The RPM was still creeping up, in other tesla turbines i've seen this is normal until it hits a specific RPM then suddenly it will get quieter and rocket up in RPM, that's when the turbine is running efficiently, you're losing a lot of energy to vibration when the air noise drops the airflow becomes laminar and the majority of energy is being transferred to the rotational energy.
That disk/housing outlets create that siren noise. If it's too loud, I suggest to use different long slots to deharmonize that interference.
What do you think of the work being done by Paul Townley (Grav Inert) with the Tesla Turbine patent? He claims to have worked out and understood a series of Tesla patents that when combined together create a super sonic Cold Steam machine Tesla turbine. Essentially natures tornado connected to a shaft with its fuel source as that of only the air around it. ie the compressed air isn't required, it will feed itself when taken to subsonic rpm speed from the air around it.
That sounds like being hoisted off the ground by pulling up your pants too fast.
I like the song at the beginning of the video. what's it called?
Why didn't you use discarded hard drive platters and bearings?
Average speed are usually 7200 RPM so it would have been be better suited
I have a serious silly question.. What would happen if you used hard drive discs instead in this turbine. I just thought of it seems silly or is it.. they are slick and smooth and perfectly round..
Selfless David made me go on the youtube rabbit hole of Johnny90 videos before I got back to this video
I wonder how this concept would work as a turbo? Add a compressor wheel and hook the exsaust where you hook the air hose to spin it.
This is obviously very cool. However, I have been wondering just how can this tech be used? I've been aware for a long time that this exists but fail to see a really good application. I would appreciate some suggestions. Thanks.
If used within a cryophorus loop the cold steam flowing to a condenser can spin the turbine, with a difference in temperature maintained between the cold steam and condensate in theory you can harness the flow to generate electricity
@@vincentschuler2408 What kind of power can this device produce? I like the potential of this.
Excellent build!
Nice machining work.
Brilliantly been built.
Excellent. I absolutely love your production standards for your videos. Have a sub.
An amazing piece of work.....can't think of a single practical use for it though, especially with the bearings he uses.
Now add a transmission and put it to work! I wonder how much power that puts out?
this is awesome! i was hoping i saw the almost 100 percent efficiency mark i saw on another video where the rpm went to 50k to 70k in almost an instant. but still this is reallllly cool
Does it have any Torque? Would more discs equate to more torque?
Chamber ID too close to disc OD inhibits even distribution of fluid around perimeter of discs?
Why would one not want to use a Tesla Turbine as a ram air generator for an RV (while driving, using a naca type duct) battery bank? Thank you!
because it has a really low torque
Could you arrange the rotor to have a step pattern for the exhaust hole, I think it will give a jetting effect.
Nice shop !
how to fix the disks spaced like that I didn't get it
Did you try to replace the ball bearings with air bearings? The flow of air is right there. Will not rumble.
This may be off topic, but someone might find it interesting.
Over unity electric generator. By AMA.
Segment 1: 1 motor with bar connected to it standing vertically. Circular disc connected to bar that has magnets embedded in it surrounded in high permeability material to focus magnets outward pushing force in an upwards direction from top of disc.
Segment 2: Hollowed out cylindrical Bar of material horizontally positioned.
Flat hollowed out ring shaped material with openings around its outer top flat edge.
Magnets surrounded in high permeability material embedded in these openings.
Magnets positioned in openings around ring are in at least 1 of 2 configurations either all N magnetic field pushing out or N,S,N,S all around it. Just depends on whether your going for Piston structure or spinning structure explained below & whether you want it to be DC or AC current.
Place these all along the cylindrical bar connected to it solidly, except at far ends of bar.
At both ends of bar place ring of material that can be magnetically repelled in specific locations. (magnetically repelled in specific location is in reference to outside of ring area that faces away from center of bar)(Other side of same ring facing in towards center of bar is capable of being magnetically repelled all around) Ring must be connected solidly to bar. points of repulsion on these rings is off set from each other on each end of bar.
3 Hollow ring structures with small square bars protruding from each. Ring structure has all magnetic repulsion on inside of ring shape & can rap around the main bar so that the bar wont be causing friction on things as it moves back and forth or spins. 1st positioned around far left of bar, 2nd position at center of bar (be sure to leave enough room for magnetic structures to be able to move back and forth without hitting it) & 3rd positioned on far right of bar.
Tube structure is constructed in two parts that fit together on top of each other length wise over main structure.
Tube structure has 3 square openings for the bars that the Ring structures that are connected around the main bar keeping it from causing friction on structure, to slide into.
This tube structure is designed with material that does not block magnetic fields. Perhaps some type of transparent material glass or other.
At both ends of the tube structure there is a built in circular groove that will house a round disc. The ceiling/floor/left side/& right side of groove has openings for small magnets to be embedded in it, so that the pushing force from magnets is pushing in towards the edge of disc that goes in this spot. There is also 4 openings located on the top, bottom, left & right positions of the open groove. Small magnets are placed in these spots so when round disc is in position these magnetic fields will hit sideways keeping it from generating friction against structure.
Far Ends of bar has Cap structure that screws over tube halves holding them together. Cap structure also has 4 points on inside top, bottom, left & right that have openings. These openings have small embedded magnets in them that exert there pushing force outwards (sideways) so it will keep disc in position, generating no friction against structure. Cap is made of material like tube so it does not block magnetic fields. (Note: These magnets in groove and cap structure are only needed for piston design. If Disc is directly connected to main bar so as it spins the bar spins, magnets are not needed here).
The disc has ring around it (ring of material goes around outer edge and folds over front side & backside a small distance) that is repelled by magnetic fields so the 12 small magnets will keep it lined up but it will be able to spin without causing friction on structure. The disc has openings on it's flat side that face inside of tube and magnets surrounded in high permeability material are embedded in this disc.
The disc has small bar that is connected to it's center that goes all the way to the other end of bar structure through the center of the hollowed out bar and connects to disc on other end. Disc on other end is set up the same but magnets embedded in it are off set in comparison. As first disc spins the magnetic fields will push against specific spot on disc connected directly to bar, pushing bar in other direction, once bar is fully pushed over, further spinning of disc will then align the other sides magnet to push it back.
Tube structure also has half moon shaped protrusion on inside and on both halves so when tube is connected they line up to make a full ring shape on inside of tube, these half moon shaped protrusions have at least 1 small round opening on it's side in middle of curve that faces away from center of bar. The opening has a small magnet embedded in it so magnetic force is repelling out sideways away from center of bar. The protruding ring is positioned to line up slightly further in towards center of bar then the ring of magnetically repelled material connected directly to bar. This way when bar moves right or left it is magnetically stopped after a short distance.
Copper coil setup: Copper coils are wound in at least 1 of 2 ways. Either coiled in circles next to each other (Like if you wound coils around a cylindrical bar) or laid out in a row as if wire was on flat table going up then bent to go down & back up until it formed a flat rectangle of wire bending up and down and then the entire structure folded around tube. Copper windings are then lined up perpendicular to magnetic fields on outside of tube. Ends of copper coils are connected into separate construct that will allow electrical current to flow somewhere else.
Circular construct is built like a stand that goes around the outside of motor segment. Circular construct has flat ring of high permeability (magnetic field shielding) material that has small openings that will allow magnetic fields through specific locations. Top of circular construct has groove to allow the horizontal bar to balance on. Circular construct can also be placed on other end of bar so it is balanced. The motor segment is positioned so the disc connected to the bar that is connected to the motor is lined up so the disc passes under the horizontal bars disc that is at end of horizontal bar. The high permeability material keeps the magnetic fields in disc from hitting into the disc that spins or pushes the horizontal bar until just the right moment when the impact will cause the disc in horizontal bar to spin which will perpetuate the piston motion in the horizontal bar. More horizontal bars of the same design are built and positioned around the motor segment in a circular horizontal fashion all the way around. The bar connected to the motor can be increased in length to desired height (As much as motor can handle) and more of the exact same setup is repeated higher and higher up, maximizing the over unity potential of the construct to ridiculous proportions. :D Current from the horizontal bars is diverted to power the motor as needed and all other current is diverted to power my game console or the world. :) Interesting variation to this design would be to connect the spinning discs on far ends of horizontal bar to main bar that magnets are connected to so the magnets spin instead of getting pistoned back and forth. So long as moving magnetic fields are perpendicular to copper wires it should work. By AMA
You have a fine mind, best of luck!
Odd question maybe. But is this type of turbine suitable for low rpm, low torque applications? Efficiency is not an issue, low friction is.
Could you make a Tesla turbine with discs which has ~50mm or 70mm or 80mm so the case has 80mm and you turn to the right diameter.
Does anyone know if a Tesla turbine has been used a high speed spindle in PCB drilling or PCB copper routing?
I see PCB air turbine spindles running at 100,000rpm, but I don't think these are Tesla turbines.
What would this be used for ?
What type of lubrication for the bearings? I'm wondering because I figure much of it will be flung off by centripetal forces, and the super-high rpms is likely to create a fair amount of heat?
I could lie and say I used a special bearing oil, but actually I went for the high tech solution of 3-in-1 that I found under the kitchen sink. In fairness, it worked really well.
Thanks! Good to know. I suppose it doesn't matter that much.
Just being silly: I wonder if lubricants for dental drills (also insanely high RPMs) or car turbos would make any significant difference.
Wonder what the duty cycle is on that.
Great video. Track? Loved it.
David, Just saw this and must say; Very well done videography and build. Enjoy JohnnyQ's work also. There is also another YT person, PlasmaStar9 that built some incredible T-Turbine models a few years ago. I didn't see much in your video about the inlet nozzle setup and curious about your methodology regarding angles and nozzle types. Pretty impressive speeds at 8-10 Bar! Also enjoyed your attention to detail during machining, like moving the chuck to the mill. Sub'd and looking forward to more. Thanks for sharing your work here! ~PJ
Thank you, I really appreciate the feedback. In the video the inlet nozzle was just the end of the air gun. But after the video I tapped the hole the air gun was pushed into and made a brass nozzle with a 3 mm diameter hole. It made a huge difference for the better in performance
I'm not sure why you have to make so many discs? Why cant you use just one disc?
What is the power input?
would love to order/purchase one of those?
Well you knocked that brief out of the ballpark
How can we make use of this engine and whether it is economical and provides a large amount of air to take advantage of it and can be operated in this way an electric generator by air and thank you and more
I think you may be driving it the wrong way.
Centrifugal pressure pulls air from the centre to the periphery, so I think you should have the exhaust at the periphery.
Assuming you're right (you're not, just look up Tesla patent) how would the applied pressure/working fluid create rotation on a hollow shaft? Entering the input through the center would be applying the drive energy in the same direction as the hollow in the rotor. There would be no differential for the fluid to create rotation.
Seems like the steel bearings would wear out quickly. Thank you.
What did this cost to build in equivalency to USD?
Well done all the best from John in Texas
"Test Day".
Brilliant.
Can you make to me a telsla turbine wich can a generator 10kw i will buy it?
Nice build 👍
Great stuff but being an older person cant hear you with the music in the background (turn iff the radio next time?
what pressure were you using at the gun i know the tank said 8 bars
Good job! Its importatnt to note the
British Patent 179,043 - Improved Process of and Apparatus for Production of High Vacua should be put on either side, your efficiency would boost up to 50% We are experimenting with this now. Nikola Tesla says this himself in the patent.
hi can you make these in 5 or 7.5kw class?
nice workshop!! what model and brand are u lathe and mill?
Nice work bro!
Awesome! It's like Engineering eye candy!
Ricardo Moreno
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Level metallvorking like god. Extra perfection. ............ Asking:
That 40000 rpm or 400000???
Probably too small, but precision bearings for dentist-drills are rated for insanely high rpms.
what kind of torque can these turbines develop?
You mentioned having a client, do you routinely fabricate custom works? I've been studying the Tesla coil and compressed air engines and would like to convert but lack the workshop, tools and resources to build everything myself. Do you have business cards?
Hello Ben. Working as a machine shop isn’t something I’m interested in doing, but thanks for the comment and I’m sure you’ll be able to find a local fabricator to help you out.
Loved it all but that darn repeated looped music has got to go!
What was the air pressure amount and HP on the air pump ?
Hi David, I tried to make something similar but it didn't work because I tried to machine the rotor in one piece using a parting tool for the grooves and I think the discs were far too far apart...how thick is the brass that you used?! Very nice video btw...I have the same DRO :)
is the parting tool you used is 1mm ???
Excellent. Is there an equation that could should power input and power output relationship? At least an estimate?
If you assume that the air within the boundary layer has equal velocity to the rotor then you can use the equation:
E = (1/3)*p*Pi*h*(R^4)*(w^3) to estimate the energy for each disk in the rotor.
Where p is air density, h is the disk spacing, R is the disk radius and w is angular velocity in radians per second.
From what I can tell in this video, the disks are about 6cm wide with a 1mm spacing, but I can't tell how many disks there are.
From the theoretical model I would estimate that each disk is receiving about 62 joules of energy. Would like to see if this is consistent with the physical model.
thks a lot David. Can you recommend a source / book to study these type of equations? Herri
Oh, I'm not David, I'm just a Mechanical Engineering student modelling the Tesla turbine with kinematics for fun. Going to make one with 140 rotors during mid semester break.
The best way to find the input/output relationship for the physical model is to measure the energy at the intake against the energy of the exhaust. Hopefully David can do this for us then I can hopefully verify my model.
That turbine is way too big for the purpose, it didnt even reach its terminal rpm... You can tell by the sound, youd have to put more air in there.
He would need a lot more compressed air to get over 41k rpm. Yeah, only sounds about half spun up.
He only needed 30k
It exceeded that
Other Tesla Turbines I’ve seen hit synchronization at around 60,000 rpm and jumped to around 90 to 100,000 rpm
I agree, dev really outdid himself. I see this thing reaching 80k+ with a better input flow. I'd assume going smaller(to better match the clients request) would make machining accurate parts harder. 🤔 ...thinner, more smoothly polished friction plates maybe??🤔
what is the relation ship between the air's pressure / heat?
And I wonder if 'choking' the engine slightly by either, reducing the internal cavity volume relative to the solid components mass / volume or restricting the exhaust port volume slightly would decrease max rpm but increse torque...
nice, now make and add in a small venturi tube into the airline Turbine inlet and get even more power for less PSI
Good work but why not add steppers to the axis on your mill , costs nothing and you will be really helped. I have runned manualy and its hell compared to CNC capability. Its easy today. You spinn up the disks very high in rpm. IS it 304 stainless ? What do you think they will tolerate before go to peaces? Have you tried to let the turbine do work for time and how much power it can deliver?
Yes, CNC would make things easier, but for the day job I write computer software and so I picked this hobby to get me away from computers. If I converted the mill to CNC, I’d reduce things back to computer programming and that would defeat the point :-)
As I made the turbine for someone who has a use for it, and they only needed about 20K RPM at almost no torque , I didn’t want to run it to destruction. The materials are either brass, aluminium, mild steel, and for the shaft titanium.
Aha is the disks around 50 mm, its what I guess on looking on the video. It means disks of hardend or stainless steal may tolerate 50-60 000 rpm. The concept is a very nice engine and think of such turbine in the car instead of the expensive innefficient heavy otto engine.
50.3 mm to be precise :-)
Thank you Sir.
where can I find a blueprints for this?
where did you get that auto center punch? It looks heavy duty. Thanks
Hi Mike - it was from here:
www.chronos.ltd.uk/acatalog/punches_scribers.html
Hi Josh - I’d love to help but I think I’d be getting a bit out of my depth, but good luck with the project.
You're a brave man, were you sure the centrifugal force wouldn't shatter the thing on top at such rpm? Great work
all that and a bag of chips! excellent! youre a true meister!
well that was bloody brilliant
Omg this looks amazing
Can I commission you for one?
hi, I have a similar project for a 24KW alternator... I was wondering if there's a formula for the size, disk diameter and thickness and disk space.
Did the user specify a load under which it has to pull 30K? 25% overspec running open throttle and no load isn't the most inspiring profile ever, but I don't know what kind of torque the user could possible expect at 30K anyway.
Hi Atlas - the application is a bit strange. But actually it needs pretty much zero torque and just needs to be freely spinning at 30K RPM. I think it would go a lot faster - but I didn't want to damage it given the amount of effort to make it.
Fascinating. Not fast enough for isotopic refinement of Uranium Hexafuoride, venturi horns would be more applicable for ventilation, could possibly run a turbomolecular pump stage but only at low volume, wouldn't be used as a medical centrifuge anywhere where only air power is had... I think my only reasonable guesses would be hooked up to a centrifuge for geological sample stratification or a niche plunge friction welder. I can tell you care about client confidentiality, but I still had to guess.
I'm always puzzled by why people feel like the rotors have to be made of metal. It seems like the lighter the material the better for that part. Thick aluminum foil or carbon fiber or even plastic (at least at lower rpm) seem like they might work even better than steel or brass.
The pressure causes thin metal to warp, it was one of the first an biggest problems when Tesla first made it. Carbon fiber might be a good option, as long as it is balanced almost perfectly.
Just a thought, would it not be easier to use mini CDs
I think they would be too thick.
bit like my line of thinking...
Excelent, how PSI???
Wooow 👀 Impresionante el Alto Nivel de Eficiencia de ese tipo u Modelo de Turbina. 👍 Te Felicito 🌟
Are you building in a reversal mechanism so you can make it spin in either direction? or just unidirectional to start?
Any chance you are selling these? I'd be interested...
Lovely...seems very slow getting up to speed ...can't have much torque? What can it be use for?
Wow far from the truth, Its too efficient when up to speed, you couldn't make much money on something that doesn't wear out, it would save too much fuel, the oil companies would benefit less and this is why we use internal combustion engines.
Tesla advised to add washers on the outer disks, for start up torque.
The military used it as a pump when nothing else would do the job.
The tesla turbine is one of the most efficient designs that exists, but it's torque is absolutely pitiful, which is why it has nearly no purpose. Additionally, the disks tend to warp as well.
i could blow on it and get high af without taking on drugs
Good Job!
Hello, if I want to buy one from you, it is possible. Thank you for answering.
That is a piece of art
I would like to know how much it would cost for you to make an exact replica for me. If you prefer not to make the same thing twice, I have a design that makes the turbine more efficient and you could try making that 👍
The second stage makes it 50% more powerful!!! I show this.
iEnergySupply what?
@@rawsteel6443 Tesla talks about putting a pump on the turbine, to rapidly exhaust the back pressure in the turbine to increase it's efficiency.
@@iEnergySupplyok, now I get it, even I want to see a version with both the stages. Hopefully it will be more efficient than a traditional turbine
@@rawsteel6443 I've proven that it is, and one of the greatest scientists of all time agrees. I got the idea from him...
@@iEnergySupply didn't know you had a channel, great channel by the way,. But then why do we still use regular turbines if the Tesla terbine is more effective?
Cant it be used as a car turbo?
The torque is very low, so they are not really that much use for anything other than a few niche application or academic interest. Still fun to build though!
@@DavidCambridge Exactly true.........the theory is beyond comprehension for something that it is most suited for.......but it does have a purpose if only to show that it can be done......the limit of your imagination is exceeded by your ambition to go to the bounds of reality
So Cool!
Not to be unfounded I give the reference to video of my model of the micro turbine Tesla with a rotor with a diameter of 66 mm which gives 2,4 kW of electric power on the generator - th-cam.com/video/1_b28Wjs_NY/w-d-xo.html
th-cam.com/video/S9ot2O1XX9Y/w-d-xo.html
1. Width of the main disks has to be less, or is equal to width of gaps.
2. exhaust windows have to possess a sufficient flow section (which is defined proceeding from mass flow of a working body and its speed)
3. The nozzle of the turbine needs to be calculated precisely proceeding from mass flow of a working body and a flow rate on escaping of a nozzle. The nozzle has to be surely located on tangential to a rotor, otherwise we lose a large amount of energy. The gap between external diameter of a rotor and a housing should not exceed 0,5-0,8mm, depending on the speed of rotation and stretching of disks by centrifugal force.
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Tesla Tech hi, I have a similar project for a 24KW alternator... I was wondering if there's a formula for the size, disk diameter and thickness and disk space.
I admit, for this purpose I have no precise formula.
Have you time to do a video in english that has focus on power in and out ? Do you use ceramic ball bearings?