DIY 80 mm Electric Ducted Fan | 3D Printed | Thrust test comparison

[@handy-capoutdoors4063]

I use to fly rc aircraft and tried ductfans a couple times. From what I remember blade pitch has alot to do with thrust. And there are some online calculators to find the appropriate blade pitch and surface area of each blade. I also noticed you had an oscillation in the motor sound when running at max setting, that can be caused by a ballance issue or the blades flexing because they are too thin. If a blade can flex then it changes the angle of attack and causes loss of thrust.

[@MechNinja]

Thanks for sharing the information and experience...I will definitely calculate the pitch and reduce it. ...My upcoming video will be a modified version of the current EDF..... So thanks for watching and don't forget to subscribe 😊😊😊😊

[@angelofmusic477]

More blade equate to less efficiencies. Check out Shubeler EDF specifications. More blade may give more absolute thrust but not necessarily the most efficiencies which is measured as thrust/power or thrust/current.

[@Slaktrax]

Blade pitch and rpm are closely related.

[@monneratrj]

Can you provide the link??? What would be the best ductfan blade number and angle?

[@dnomyarg32]

Very nice work. It looks like you made your blade tip incidence 45 degrees, presumably for printability, but this is much too high for efficient static thrust, as it puts too much energy into the exhaust efflux. If you can print it so the tips are more like 25-30 degrees, I think you will see higher thrust, and in that case your design will probably optimize on a different blade count.

[@MechNinja]

Thanks for suggesting me....And I will definitely try it. And if you have any best blade design than you can mail me at [e-mail] ...if it improves the thrust than I will definitely make a video out it and pin you.... Thanks for watching and subscribe for more videos 😊😊

[@jps99]

@@MechNinja If you should optimize your blade design further, will you please make it available to those who purchased your EDF stls?

[@MechNinja]

Hmmm ok bro...😊😊...when it will be available then just remind me....😊😊 So just press the bell icon so that you don't miss the video... thankyou...😊😊

[@connorruss5976]

Reducing the clearance between the blades and the duct will also make a big difference

[@MechNinja]

Yes definitely...and current clearance is 1 mm and If I reduce it then blade will start hit the outer casing. Because no matter how round it is, but 3D printed part will try to expand because of centrifugal force on high rpm.

[@arthurbesnard1536]

You should always use an odd number of propeller blades, this is preventing symmetrical axial vibration which can cause self destruct...

[@MechNinja]

Thanks for sharing the information ☺️😊☺️ I will have a look at it...but my EDF rpm is not enough for the propellers to self destruct and hence they are safe but when I will move on to high kV motor then I will definitely keep in mind.... So thanks for watching and don't forget to subscribe 😊😊😊

[@kenchen704]

many EDF manufacturers disagree--other than it is insignificant, how do you explain the vast number of 10 blade 12 blade 8 blade EDF units

[@arthurbesnard1536]

​@@kenchen704 Probably because it is cheaper to manufacture and vibration is not a problem ? Vibration modes on small composite EDF props are very high frequency compared to big one so it much less a problem. Remember that it is harder to balance a fan with an odd number of blades but if you don't have advanced equipment to balance it, odd number is not a bad choice. It will not be perfectly balance but will not resonate... Prime numbers work best (2-3-5-7-11-13 blades) Some Turbofan manufacturer choose even numbers that are not prone to resonance. 2 times a prime number work great because it's the best of the two words, 26, 34 or 46 for example. It's easy to balance, and not prone to resonance. This is why 4 blade is often used for planes that need power. Same for 10 blades EDF (2x5) Also, in a turbofan, each row of blades must have a different part count to the next row. They use a different prime number as seed for each row. It's a very vast subject full of compromise, but I think for less that 10 blades, prime numbers are a good start for Diy...

[@kenchen704]

@@arthurbesnard1536 congratulations, you have proved your own terribly generalized statement wrong

[@arthurbesnard1536]

@@kenchen704 Why ? I mean his EDF is not small at all, and clearly not balanced, so using a prime number of blades would be beneficial in his case...

[@jayaganesh4526]

Ok so you created vents to cool the motor and then proceeded to seal it,🫡great work🤟🏻🤟🏻

[@MechNinja]

I have tested it in both the cases. And iny future projects i have removed the nose cose. Please watch my new videos there are so informative....and thankyou for watching and don't forget to subscribe 😊😊😊😊

[@dineshvyas]

Wow one the best educational content delivered by an educated person.

[@MechNinja]

Thankyou for your compliments. Don't forget to subscribe...for more videos My upcoming video will come out today so don't miss out...😊😊

[@Onetimega]

These fans look perfect for my PC case. Nice work man, it looks really cool

[@MechNinja]

Thankyou so much 😊☺️☺️ Don't forget to subscribe

[@kylemilford5968]

I am amazed you were able to drop engine temp by 6* after running at max power for 10 minutes and from what my eyes could tell increased maximum thrust at the same time.

[@MechNinja]

Thankyou so much for your analysis.... And do watch my new videos....they are also informative... And don't forget to subscribe 😊😊😊😊

[@Skyisnotalimit]

Very nice! By increasing the amount of blades doesn´t mean it will produce more thrust, it will get heavier to spin and you will need more torque and hp. But then again, by increasing the rpm, the 6 blades will probably meet it´s end of map, and by spinning faster over that, more blades may be required, and so on.

[@MechNinja]

Thanks for the tips! And thankyou for watching the video, Actually its my old video. Do check my new video, there are good too. and don't forget to subscribe.

[@royeverett]

I did not expect them to be so similar! Great test.

[@MechNinja]

Yes bro the results are similar.... Next tym I will use a high torque motor.... Thanks for watching and don't forget to subscribe ☺️☺️

[@chrislenard_9297]

they are not similar the arm is locked upto a position every fan goes only to the same length thats why they are same

[@far1002]

I did turbulence and air restrictions added weight. Ur only tuning ur not gonna increase thrust much changing the shape of the edf housing. Would change things like thrust.

[@chrislenard_9297]

@@far1002 I am not talking about the edf but the thrust stand in which the edf is mounted it is limited to a certain travel so the edf cannot produce more thrust

[@FffjjjaAa7]

First author take time to pay attention to holes for motor ventilation then placing diffusor over it covering holes. Awesome!))

[@MechNinja]

I have checked the thrust in both the cases, with and without the diffuser as I want to check the difference in thrust.

[@abuxxx3607]

result at 10:49 will change if you will test it at full charge for every type of propeller. 6 blade propeller is way higher than other because it was tested first, the last one was tested with battey not in it’s full charge state. Maybe you should include in the table result the voltage reading before each test.

[@pauljs75]

Static testing might not tell the reasons for using different blade numbers though. Supposedly there are different thrust curves and depending on the speed the aircraft flies, there may be differing efficient operating ranges. (Slower aircraft may benefit from a different blade count than faster ones.)

[@johnblaze5553]

Yup, missing variables for sure. He could time them based on a set distance, rpm, and thrust.

[@oz93666]

That's a critical point . To put it in simple terms this test gives the thrust when fan is not moving through the air . So figures are accurate if used in a hovering drone , thrust directed downwards , efectivly no movement , but if fan used on a plane moving through the air at perhaps 50meters/sec the air is already pushed into the fan at that speed and then many blades ( and different blade pitch) may result in higher efficiency ... In an ideal world you will know the speed of your craft and the manufacturer will suply the most efficient fan type.

[@MechNinja]

Thankyou for your valuable response.....Is there any other way you want to suggest me for thrust testing....and in my upcoming videos i have i have redesigned my test rig using a load cell and calculated more accurate results.... Thankyou for watching and pls subscribe my channel so that you don't miss any video.....😊😊😊😊

[@oz93666]

@@MechNinja I think the only way to be more accurate is to make a small wind tunnel . This need not be complex , Just a fan or fans and a tube or box section ( perhaps 50cm diameter) so the air is directed onto your ducted fan . the air flow has to be made non turbulent by putting guides in the tube. By varying speed of wind tunnel fan/s you can change speed of air flow and so measure thrust of your ducted fan at different velocities . Supose you have an tunnel air flow of 20meters/sec with no power to your ducted fan it will show a negative thrust Due to drag

[@MechNinja]

Wow.... seriously i really appreciated your thought...and it looks easy to build but I am damn sure it will be a difficult task to do.....but yes this method will leads our test to another level of complexity....i have noted down sir and i will definitely do it in future...when I will go deep in testing.... currently i am working on different profiles of the blade for maximum thrust.... Thankyou for your suggestion sir... And thankyou for watching the video and don't forget to subscribe 😊😊😊😊😊

[@sanashams322]

This man has made a very good and cheap edf thx

[@MechNinja]

Thankyou so much...😊😊😊

[@srivastavasunil]

How does the motor cooling will work when you have covered the grooves exposed to motor but covered by diffuser?

[@MechNinja]

Yes in the 3 cases I have covered it with diffuser. But in the last case I have removed it and the results can be seen in terms of temperature difference. We'll that depends on us whether to keep the diffuser or not... Thanks for watching 😊😊

[@srivastavasunil]

You are good.

[@kf4293]

​@MechNinja I wonder if you take the tip off of the diffuser if that would let enough air through, especially when the unit is actually in flight? 🤔 You could even build a small 3 blade into the diffuser nose that would ram air through there when it spins! 😂

[@wing0001]

This video changed my thoughts

[@richiskinner9810]

Nice test rig! I'd only suggest to add counter weights to balace out the weight of the arm and edf. That makes the math easier and would allow to measure the force at every given speed and not just full force

[@stevennagley3407]

Why add counter weights when you can simply balance the fan blades

[@stevennagley3407]

I think I understand your comment in relation to the test, the test was to measure the maximum thrust… the counter weight would conflict with results

[@markplows2198]

Did the mass of the propeller change significantly from 6 to 12 blades? You seem to have used the same mass for the "ideal weight" of the test arm across all the tests.

[@MahinKhattak]

It doesn’t matter since it adds to the weight of EDF, not the arm.

[@sanghyukseo1498]

@@MahinKhattak it matter

[@MahinKhattak]

@@sanghyukseo1498 it doesn’t 🤦‍♂️

[@sonicsupersam7793]

@@MahinKhattak it does, because it first needs to lift its own weight to lift the arm.

[@aurktman1106]

Yes, it matters. The thrust has to overcome the extra weight of the additional blades. If it were mounted horizontal, then the additional mass wouldn’t be an issue but the additional mass must overcome gravity to move. It matters very much.

[@morticeandrigby]

more blades yields a higher the compression and slower air speed so you need reduce the exhaust orifice size to get greater thrust, possibly an adjustable exhaust orifice like a jet has to test the max output thrust

[@MechNinja]

Yes you are correct, more blades means higher compression but the the motors I am using has a low torque, so it won't be efficient. But I am working on another EDF which as max Thrust than this... So thanks for watching and don't forget to subscribe 😊😊😊😊

[@vishalbeniwal8631]

@@MechNinja which type of motor you use

[@MechNinja]

Racerstar 2500 kv motor

[@ahsan____spk]

honestly , considering everything you are a legend !!!!!

[@rafdjislampura6454]

Excellent. I would have loved to see a vibration sensor on your rig to see how balanced you prop is. Visually I don't see any issue.

[@ffyn8778]

Next time you will have time to see 👀

[@benthompson4672]

instead of just doing 4,8,12 propellers you should try all of the numbers between 4-12 and see which one preforms better. Nice video.

[@MechNinja]

Ok definitely....I will do it in my upcoming videos.... Don't forget to subscribe 😊😊😊

[@PPB_Army]

Great quality video Brown skin Man are smart 👍🏾

[@goobisoft4873]

Edf motor generally require higher stator volume motors so for 2300 kv motor it has be quite big in sizr in order to be able to spin that prop with greater toruqe and without getting overheated ,i have a 70 mm 5 bladen3500 kv motor it has 2222 stator which is quite long

[@MechNinja]

Yes you are right.....But EDF motor consumes lots of current and these motor uses less current. I am in the process of designing an EDF with this motor so that it can be efficient without overheating the motor.... Thankyou for your comment and don't forget to subscribe 😊😊😊😊

[@vasilisk-66]

Очень ценный опыт. Нет корреляции между углом атаки лопастей и плотностью воздуха. Как результат, создается разрежение, а не тяга. И второе. Попробуй пустить холодный пар на вход потока. Увеличишь плотность, вырастет тяга.

[@cpe1704tks.]

Interesting. More blades mean more air movement. Maybe if you do this experiment again, bumping up the amperage in proportion to the number of blades, you will probably see efficiency gains, overall. I bet ya.

[@dendyaqilaagata7051]

verry good work, mybe you can add CFM data,so you know how much air can be sucked in, so you know how much efficiency really is

[@MechNinja]

Yes I can add it but then I have to explain it too and then the video will be longer. But soon I will try to find a way to put lot of information..... So thanks for watching and don't forget to subscribe 😊😊😊😊

[@AClark-gs5gl]

Would be interesting to see if a increase in thrust/velocity, if you added a exhaust nozzle/bernoulli effect. Maybe a 12.5% smaller in diameter exhaust nozzle than intake diameter? Thank you!

[@vasilisk-66]

Должна упасть тяга. Так как перед соплом образуется зона повышенного давления. В результате, образование вакуума в рабочей камере импеллера.

[@TobiasKornmayer]

Nicely done! Maybe time to test three blades and see if it's even better?

[@MechNinja]

Yes I have tested it on 3 blades and In the conclusion part I have said too. Actually the 3 blade propeller was working poorly because the pitch is hight. So in my next video I will reduce the pitch and test it on different propellers...... Than I will update the result.

[@ollih5562]

Hello, the deflection pulley divides the weight again, there is a formula but I don't know it at the moment. I always use a pull sled.

[@vincentrobinette1507]

I'm not surprised. More blades = More leading edges, each of which require motor torque to 'slice' into the air. The ideal number of blades is the most blades that can be used, that will allow each blade to get a "full scoop" of air. More blades means that the total surface area of each blade is NOT being utilized, so there is no gain in thrust. Just more leading edges, to create rotational drag on the motor. With the surface area of each of these blades, I would think the optimum number is 5 or 6 blades.

[@MechNinja]

Thankyou for sharing your view on this video. And yes the maximum thrust was from a 6 bladed propeller. And this is my old video. do check my latest videos on EDF, they are good too. And thankyou for watching and don't forget to subscribe 😊😊😊😊

[@abdullajonisakov4133]

11❤

[@NvTwist]

Not sure if anyone’s pointed out or you’ve since discovered the data collected with your thrust calculation rig is incorrect and invalid, but easily corrected without retesting. The ideal weight you measured is to low and missing the total weight of the 4 screws used to attach the EDF the arm. So your total thrust calculations are to low seeing that it’s lifting more weight than what’s in your Base data. Weigh the 4 screws and add it to your test results to get the correct and higher thrust results.

[@AndreA-mj3ps]

For the 6 blade the battery is full 12,20 volts but whit the 12 blade is more discharged 11,69 volt . I think... it is important that the voltage output from the battery is always the same,otherwise the ampere will increase and the engine will perform less. What do you think? The test is intresting! Thanks

[@MechNinja]

Thankyou so much for watching and don't forget to subscribe. You can check my latest videos with good results

[@richardblanchard2743]

It would be interesting to know what rpm these fans were turning at and if there was any difference in thrust at different rpms. Nice video.

[@angelofmusic477]

Interesting but rpm may not be helpful as more blade means lower rpm and higher power albeit more absolute static thrust. ...my 2 cents

[@JehanPrasetyo.p]

Finally some good tech video

[@felipperohling2255]

you gain more one fallower! I will buy this engine to my project, i will make a aeromodel with sticks from bamboo and papper

[@MechNinja]

Sounds great! thank you so much

[@trionghost]

In aerodynamics we calculate coefficient of thrust divided by rotor fill. It have known optimal value.

[@555_shoe]

You should compare the thrust with the same rpms. The motor brings power of X Watts and this aims to a rpm depending on resistance of the blade system. More resistance --> lower rpm -->less thrust. so I assume you will never get more thrust with the same engine at max rpm an more blades.

[@ggepp]

Need to change the motor for the 12 bladed fan like you said. Nice vid

[@MechNinja]

Thankyou so much...and don't forget to subscribe 😊😊😊

[@AuroraCypher]

Very nice test ! Can you show a speed up video of how design these 3D printed propeller and EDF housing on a CAD software.

[@MechNinja]

Yes I can show it but it will be a longer process, so I generally skip those parts.

[@MechNinja]

But in future I will try to add a timelapse of ot

[@walterdavisii8936]

it's best to do a performance curve. each fan will perform different at different RPM. You will see a bigger difference with different Pitch on the Blades than adding more blades.

[@MechNinja]

Thankyou so much for your analysis.....I am working on performance curve....my apparatus is almost ready....and in my upcoming videos you will definitely see a more advanced version. I am working on it. Thankyou so much for watching the video and don't forget to subscribe 😊😊😊😊

[@yangwang6952]

You can study tip clearance and you might get interesting results. I think current one is rather bigger to get the best performance.

[@Jinnseng]

what do you think the max thrust you could achieve with a 3D printed fan ? could you reach 15KG ?

[@MechNinja]

No 15 kg is too much.... One youtube channel has conducted a test of 3D printed propellers and it break at 8 kg. So we much use injection molded propellers for high thrust.

[@Jinnseng]

@@MechNinja awesome, do you think you’ll make these eventually ?

[@peterryseck]

And performance without the duct?

[@MechNinja]

If I remove the duct than the efficiency will decrease. Because the duct prevents the air losses from tip of the propeller.

[@mitchellreece3711]

You need to charge the battery between each test. We can see the voltage sag is different on each run despite the amps remaining relatively stable

[@MechNinja]

Thankyou for your valuable feedback....it is an old video....but do check my latest videos....i have improvised many things....and has designed efficient EDF. Thankyou for watching and don't forget to subscribe 😊😊😊😊

[@GermanLopez-gr3pd]

Good video man, thanks for sharing ..!!😎

[@MechNinja]

Thanks for watching and don't forget to subscribe 😊

[@Vishad_Vishwakarma]

your motor cap will block the vents of the blade add some on the end cap too

[@MechNinja]

Yes definitely they are blocking the vents. That's why I have redesigned them in my next video. Pls check it out... And thanks for watching and don't forget to subscribe 😊😊😊😊

[@indianplayer5025]

What if more propeller of 6 or less blade attached instead of one propeller?

[@MechNinja]

I have made one, you can check my 100 mm ducted fan video

[@indianplayer5025]

@@MechNinja Not found the 100mm ducted fan video.

[@MechNinja]

kzbin.info/www/bejne/bmnGfmeLfd-Fbc0 Here it is ..and don't forget to subscribe 😊😊😊😊

[@pierpa_76pierpaolo]

3:10 Motor diameter 20 mm?

[@MechNinja]

No the motor diameter is 28 mm

[@orobinczaia5527]

12 blade has 2x the drag of the 6 blade; reducing the drag will increase lift significantly.

[@trentinfield7903]

GReat video. Thanks for your work!

[@MechNinja]

Your welcome.... and thankyou for watching the video and don't forget to subscribe 😊😊😊😊

[@sajalacharjee7008]

You are using pulley to connect the weight machine. Is it giving any mechanical advantage

[@MechNinja]

No it's not giving any mechanical advantage. But If I had directly attached the spring balance below the motor than the path of the thrusted air will be blocked because of spring balance and hence decrease the thrust. Thats why I have used a string to reduce surface area. Hope you get my point.😊😊😊 So thanks for watching and don't forget to subscribe 😊😊😊😊

[@sajalacharjee7008]

@@MechNinja I won't forget

[@MechNinja]

Don't forget to subscribe 🙂🙂🙂

[@BGTech1]

Try using stationary angled guide veins at the back of the fan. It will make more thrust

[@angelofmusic477]

Thank you for sharing. Your finding is similar to Shubeler EDF. Their 3 blade EDF is the most efficient and their 12 blade the least efficient. 5blade EDF should give a more practical number...my humble opinion.

[@spiritzweispirit1st638]

Thank You! Super Concise Information, Great Easy to Understand Video!⭐👍

[@MechNinja]

Ur Welcome....nd don't forget to subscribe 😊😊😊

[@b.w.oostdam8875]

Thank you for the test! I have never unstood why the motor is not mounted in front of the impeller. It would make so much more sense for cooling but above all for the weight distribution (CG) in a model airplane...

[@MechNinja]

Thankyou so much for watching and don't forget to subscribe 😊😊😊😊

[@aaroncheng3927]

i always dun understand how the blade number affect the speed. and how many are the best, but i know aircraft engine got a lot more blade, and why? the video show that 6 is highest efficience, and why not aircraft use 6? the turbulent?

[@MechNinja]

There are various factors which are responsible for the speed of the aircraft apart from the number of blades i.e. design of the blades and design of the duct. In aircraft the blades are used for the compression of the air so that it can be burnt so it uses more blades. But in our case the thrust is produced by the speed of the air that's why we have used less blades, but the no. of blades vary in EDF depending on the design of the blades and dia of EDF. Hope you get your answer...feel free to ask anything And thanks for watching and don't forget to subscribe 😊😊😊😊

[@lifeisbeautiful4598]

Next time compare 6 bladed propellers with different angle on blades. Also wanna see the result if the propeller is attached in a ring .

[@MechNinja]

Bro my new video is out.....I did what you asked for.....So pls like and share it and hope you will enjoy that video.....😊😊😊😊

[@jaydencrimsoneverett6731]

Bro, i love your creations and i admire your creativity. And im kind of wondering is a propeller better than a ducted fan or the other way around

[@MechNinja]

Both are unique in their own way.....the difference is that... though propeller produced more thrust as compared to EDF, nut EDF takes less surface area ( 3 inch dia ) as compared to propeller ( 6 Inch ). We can't use propeller in RC jet plane but we can use EDF because of its smaller size as well as it's mass flow rate of air. Hope you get my point. Thanks for watching and don't forget to subscribe 😊😊😊

[@christiansprojects-cgmanuf1426]

Great Video! I think, the blade angle is much too steep. It sounds like they are constantly in stall condition. Making the blades less steep will definitely increase thrust. Try 20-30 degrees if your printer can do so.

[@MechNinja]

Thanks for your suggestion and I will definitely redesign and test it. If the result improves than I will definitely upload a video for it. So thanks for watching and subscribe for more videos...😊😊

[@seyer8896]

Do you know of any airfoil file that can give you 20 to30° angle of attack for a duct fan With good coefficient lift?

[@abdullahalfaruk6356]

Excellent man! Love it😍

[@MechNinja]

Thanks bro..... subscribe for more videos 😊😊😊

[@duduc998]

You should measure the force at the same distance from the pivot at the motor. The way you measured gives you a higher reading due to the leverage. Nice prints though.

[@MechNinja]

3.5 cm hardly plays any role due to leverage. Initially I thought to place the string at the center but I don't want to create any obstruction in air flow passage...that's why I have placed it to the nearest point. And Thanks for watching and don't forget to subscribe 😊😊😊😊

[@GoldenCroc]

@@MechNinja It does make a difference because your arm is so relatively short, 3.5 cm is a considerable percentage of the total length.

[@joserolandsancheromero4440]

Eso está excelente, esta tan bien diseñado que da hasta asombro. Excelente video

[@MechNinja]

Gracias por mirar y no por suscribirte a más videos como este.

[@dinukasheheranbowattha5907]

I belive one day u will make flying jacket ... I am waiting for that day sir ...

[@MechNinja]

Thankyou bro.... don't forget to subscribe 😊😊😊

[@dinukasheheranbowattha5907]

@@MechNinja you have to earn it ...plz make fly jacket.. then I will do it .... noting you will get free bro....

[@naoton201]

Nice bro Add noise level too

[@MechNinja]

Sure bro... and thanks for watching and don't forget to subscribe 😊😊😊😊

[@savneetsinghrairai6823]

Good job 👍🏼 💥👏 try high torque bldc motors like sizes available in ready made rc electronic jet ducted fans

[@MechNinja]

Yes bro I can try a high torque motor. But I want to make an efficient EDF which can work on less torque motor. And I am working on it till I get the best result. I know that high torque motor will give good result but then there will be no difference between ny EDF and the commercial one. Hope you get the point...😊😊😊😊 So thanks for watching and don't forget to subscribe 🙂🙂🙂

[@trevman187]

I wonder how the efficiency is affected at different rpm levels

[@kenchen704]

More blades are better at closer to supersonic speeds. These EDFs won’t spin that fast so fewer blades are more efficient, unless you are spinning terribly slowly (at which point get a prop, not a EDF)

[@BhanuChandar-r8c]

Can I use this thruster for underwater ROV ?

[@MechNinja]

I would recommend a low bladed EDF, along with round edges

[@JCnordic2983]

What is the CFM of those doctor fans and what's the total energy consumption is it DCA C

[@MechNinja]

Well I have not calculated it as I have not performed the CFD analysis....but in future I will definitely perform it..... Thankyou for watching the video and don't forget to subscribe 😊😊😊😊

[@jasonmajere2165]

Rpm would help also. Not sure if it matters as silent fan usually use prime number of blades to help with frequency noise.

[@igosmart-proigsp9526]

Need your help. I need to design an outer 3D shell for dual motors. Can you help..? Later will need to be made from aluminum alloy

[@MechNinja]

Watsapp me at [phone]

[@greg0063]

Would the 3d printed parts survive a proper edf motor and battery setup? Idea for other video maybe.

[@MechNinja]

Hmmm actually 3D printed parts are way more stronger than we think. And yes they can survive the proper EDF motor and battery setup in one condition. That there should be least to no vibrations in the propeller and this can be only achieved with high accuracy printer. And one more thing that there is a limit of rpm that the 3D printer parts can withstand without breaking because of the centrifugal force.....

[@greg0063]

@@MechNinja same with molded parts, too much speed and they deform and shatter as well. It would be an interesting test to see if its worth it to put in a plane.

[@MechNinja]

Yes definitely, the one I am designing will be used in RC planes in my upcoming projects. But I will only install them when it has a high range of thrust. I have been continuously designing and upgrading my EDFs and uploading the results. So thanks for watching and don't forget to subscribe 😊😊🙂🙂

[@michaelgrund7290]

Redesign of the struts to a negative blade design down to 0° in flight direction will result in less air rotation behind the blade and may result in a higher outgoing air speed and less turbulence.

[@MechNinja]

Thankyou so much for your valuable suggestions. I will definitely work on it as soon as I figure it out... Thankyou so much...and don't forget to subscribe 😊😊😊😊

[@gormahek3535]

Very good job. Well done

[@MechNinja]

Thankyou.. And thanks for watching And don't forget to subscribe 😊😊

[@prich0382]

More blades is more pressure but less flow. Example PC case fans, you choose flow or pressure fans, in you have no filters, flow is better, if you have filters, then pressure fans are better

[@airhammer6203]

That was cool, very interesting. AirHammer out!!

[@MechNinja]

Thankyou for watching and don't forget to subscribe 😊🙂😊☺️

[@PHM_Tech]

Pls test against 4 blade

[@JcXtreme72]

First I want to say very nice video, thank you. Second it's time to add an afterburner

[@rmatveev]

I'd try to have a thrust vs current curve, as different propellers could have different efficiency at different rpm.

[@patobanion]

Nice work! How did you design the blades for the fan?

[@MechNinja]

I had an EDF, so I had replicated the blade design

[@TurboDirectSA]

What was the RPM of each blade - this will provide alot more information into the efficiencies of the different blades.

[@MechNinja]

Well currently I don't have a tachometer but I will certainly buy one and will use it in my upcoming videos. So thanks for watching and don't forget to subscribe 😊😊😊 and do support my videos Thankyou

[@edikoo8161]

Nice Work 👍

[@MechNinja]

Thankyou so much... don't forget to subscribe 😊😊😊

[@manvirauppal]

Can you make a similar video on water pump using Rs 775 motor and test it in a similar way with six blade four blade or 8 blades propeller

[@MechNinja]

Yes its a nice idea...I will definitely try it. But the blade will differ from these blades as these are designed for max air flow and pump require pressure. I will try it bro... And don't forget to subscribe....

[@manvirauppal]

@@MechNinja i have already done it yesterday when i watched this video. Your work is excellent 💯 Nicely represented all fact

[@MechNinja]

Thankyou so much 😊😊😊😊

[@Angelum_Band]

Why was a 5 blade propeller not tested? I would like to know what is the sweet spot regarding efficiency.

[@dimitrijehadzi-pavlovic2870]

Excellent video. Thank you!

[@johnadriance7792]

So you put cooling cut outs on the fan then cover them interesting move.

[@MechNinja]

I covered them to check the thrust difference before and after nose cone.....but I will remove it while using the EDF... Thankyou for watching and don't forget to subscribe 😊😊😊😊

[@albertobenevenuto77]

Are the blades the same? Are it in the same angles?

[@MechNinja]

Yes sir the blades pitch is same. Only the number of blades are changed.

[@srscott10]

The blades you use are simple fan blades. Is it possible to print blades that are shaped like a propeller? A propeller is shaped like an airfoil and creates a low pressure area in front of the blade that actually sucks the blade forward. You might get an increase in overall thrust with that shape. A three blade propeller would be a good design to start with.

[@MechNinja]

Stay tuned. My upcoming video has all your doubts. 😊 I have tried 3 blade Propeller earlier but the result was low so I haven't shown in the video. However I will try one more time and check the result.

[@marvinalone]

what's the power consumption with different blade?

[@Listenitnow-d4p]

WE CAN FEEL ITS THRUST FROM ITS SOUND

[@MechNinja]

Thankyou for watching it...and don't forget to subscribe 😊😊😊😊

[@Amit-singh1]

I have a query if EDF is place vertical and thrust is in upward direction if high speed air coming towards EDF in horizontal direction then the result of thrust will change or remain same.there is no effect of air on propeller performance. Please give me answer

[@MechNinja]

Well that's a very nice question 😊🙂... Though I am not 100% sure....but I will provide you my answer... See when there was no external force ( air ), applied to the EDF than it has the max thrust in vertical direction. But when high speed air comes in horizontal direction then horizontal force will act on it and this it will tilt the EDF at some angle. Now using parellelogram law of vector addition, we find the resultant force. And this resulting force when divided into its vertical and horizontal components. We get the vertical thrust as vertical component on resultant force. Now here is the answer to your question, The thrust of the EDF will remain same but thrust in vertical direction will change. Hope you get it. And feel free to ask any questions....😊😊 And don't forget to subscribe...😊😊

[@Amit-singh1]

Hello sir I want to know about propeller design specially chord distribution from root to tip of propeller and thickness distribution from root to tip of propeller

[@MechNinja]

Well it's a very tough question but unfortunately I can't answer it. Because I am a mechanical engineer and your problem can be only solved by a aeronautical engineer. Though it is a machine design problem but we are not taught in detailed about a particular topic. Or you can find a person who has a brief knowledge in fluid mechanics....Hope you get it....😊😊😊 But for any mechanical problems....I m here and you can comment your problem on any of my video....and I will be there ..😊😊😊 But don't forget to subscribe 😅😅😅

[@maciejpilarski3581]

very nice :] pro measurements!

[@MechNinja]

Thankyou so much.... don't forget to subscribe 😊😊😊

[@t_sixtyfivex_wing8787]

Very good setup and work hard, but In my opinion you should fix the engine then measure the trust directly for example you put the weight scale 20 cm from the output nozzle.

[@MechNinja]

Oh yes i must do it but this is so far accurate method I have fount out for thrust calculation. I am in development of electrical thrust calculation device and thus it will give an accurate result. so thanks for watching this video and don't forget to subscribe

[@t_sixtyfivex_wing8787]

@@MechNinja Thank you very much and I subscribed already 😊😊😊

[@igosmart-proigsp9526]

Looking for some help designing 3D Prototype for 2 motors. Can you help?

[@MechNinja]

Watsapp me at [phone]

[@tripody1]

Nice work, it can be used as jet engine for RC Airoplane with changing Motor.

[@NANDOFFDataRecovery]

Awesome work.

[@MechNinja]

Thankyou....and don't forget to subscribe 😊😊😊

[@Oladavid007]

you used 230gm for the weight of 6, 8 and 12 blades respectively there should be an obvious weight difference between the configurations maybe this might have effect on the efficiency

[@MechNinja]

I have checked the weight of all the propellers....and there was a negligible weight difference so I have neglected the weight......

[@potatopeel2]

You can also increase the efficiency of your ducted fan, by reducing the gap between your propellers and the shroud wall. The smaller that gap is, the better your efficiency will be.

[@Projet519]

I use the same ESC. We're you able to program them and how?

[@tbremard]

Hello what is the 3d Printer that you use ? which one great pringer could you recommand for me ?

[@MechNinja]

I use ender 3 pro and ender 3 max. And they are good for beginners and also I have been using them since two years and hadn't found any problem yet. You can go for them....😊😊😊

[@albertobenevenuto77]

Tks for the video!

[@MechNinja]

Your welcome and don't forget to subscribe 😊