Great! But you forgot one very important parameter: the rotor RPM. You should compare thrust at the same rotational speed and measure energy consumption. Static thrust is good to know, but in-flight performance can provide a bit different results. Thanks for shaering the results.
In the construction of a ducted fan, the clearance between the blade tips and the edge of the duct is very critical. The thrust difference that you are measuring is mostly the result of blade tip variation. The variation that can be seen in the images.
i have a patent pending diverting stator. it reduces the flow area and steers the spiralling air to exit straight out. The reduced area increases the exit velocity. There is also an initial buildup of air between the propellor and the diverter. The net result is a higher and larger mass exitng the duct and therefore increased thrust.
Doesn't a Kort nozzle do the same thing? Is your diverter before or AFT the propeller? I can imagine low pressure air at the narrow exit running into high pressure air just outside which would result in vortex flows which counters the result of straightening stator vanes at the exit. Also this increases drag at the exit if the nozzle is long. However there should be a positive thrust pushing forward at the exit. Curious if you have done non static tests as this could be a balancing act!
Great comparison, thank you, it is very helpful for my project. As someone said, RPM is very important factor. We can see something interesting happens here: more blades = more thrust, more current. I can tell that more current = motor more struggling so RPM is lower. At some point (8 blade propeller) current still goes up, but thrust going down, it means that motor over struggling and it losing RPM drastically.
I'm fascinated with your ducted fan experiment. I think it will be great feature in electric aviation era. How to get hi-efficiency on generating thrust? Yeah, still plenty room for experimental design. Here are my points: - Get idea from tornado and reverse it. - Get idea from hair driyer, hot and cold air collided. - Ducted fan, safer and controllable. - Thrust vector & auto adjustment
Well, my design just an imagination. But you can print at will and test it, if you want.
On the clearance between fan blade tips and the edge of the dict, why not have the dict and the blade as one piece? The dict also spins around. There in no blade tip vortex and no need for arms holding the duct to the centre.
Yes I can do that but it will reduce the motor rpm as the propeller will become heavier. Since we can't add much weight to the propeller that's why we can't make that.... If you have any other suggestion then definitely let me know. And thanks for watching and don't forget to subscribe 😊😊😊😊
Hi! Can you make a waterproof construction for a SUP board? I think the motor doesn't have to be underwater. Perhaps, as on a hovercraft, he will just push the board
Yes why not....😊😊 Use cura software...it's free of cost and let all the settings be default. Then change the speed to 60mm/sec, 0.2 mm layer height and 20% to 30% infill...... that's all By the way thanks for watching and don't forget to subscribe 😊😊
good job, finaly a good analysis on printed EDFs, use prop dia closest to standard propeller diameter to get best results ! low diameter and high propellers can work equally well. please try it with lower KV motors, something like 920KV
Yes i have measured the performance without the stator too... You can check my previous video for it.... And thankyou for watching the video and don't forget to subscribe 😊😊😊😊
hi Mech Ninja! i am really enjoying your fantastic videos, your tests are really interesting and educational. i don't know enough to know whether the fan design is also suitable for these applications, but if you are looking for a fan design constant to test other variables, the mk.iii from Major Hardware's 3d printed PC fan showdown is one of the best performance designs he has tested (from 100s of designs by now) and has been shared, so it might be a good fan design to work with. keep it up! i have subscribed and can't wait to see more!
Thankyou for watching my videos and i really appreciate your suggestion. And i will definitely check it. Thankyou so much...like share and subscribe....😊😊😊
Since I am not good in CFD, hence I generally design the blades using online available data. And for comparing different blades, i use my above data to find the best suitable propeller. But in future I will be designing and testing them using CFD.
@@MechNinja 272 / 5 000 Résultats de traduction OK I understand. I know that there are different shapes of blades, some of which tend to offer less resistance to rotation, the ratio of electrical power consumed / thrust force produced might be better. I subscribed Good continuation
Are you going to try another motor on the backside of the stator? And, are you going to experiment with an hourglass shape between the motors for compression purposes? Or simply reduce the size to make it more funnel shaped? CFD would certainly help answer this. In first thoughts, it would help in 2 areas. First, directed air flow would be more predictable, allowing for design choices around the exhaust area. 2nd, the expanding air at the exhaust could help with backlash or oscillations by pillowing and pushing back on the motor assembly.
Thankyou for your suggestion. I will definitely work with CFD Analysis now because practically testing is time consuming. So first I will choose the best out of CFD then perform the practical. Well thankyou for watching and do share it....😊😊😊
Can you test with actual edf blades? Like plastic molded ones. In my country is impossible to get edfs bigger than 50mm, so I would love to see this edf compared to one you can buy
Yes I have ordered them....but to watch it you have to subscribe 😅😅😅 I will definitely use the commercial available blades and compare both of them... So thanks for watching and don't forget to subscribe 🙂😊😊🙂
Yes...In my case it is best......if you would like to sahre any other information then do send it.... Thankyou for watching and don't forget to subscribe....😊😊😊
Do you use a filament type 3D printer or resin type? There are some new high strength resins that might be more firm/stronger and reduce flex on the blade and might print lighter which will increase efficiency. Also, it would be interesting to see a 7 blade test. Just my two cents!!
Claro que depende su uso, pero en modelos de aviones, un EDF de 80mm ocupa un buen motor que soporte unos 1600 watts y los nuevos modelos estan saliendo hasta de 2000 watts,
If you are a mechanical engineer....then you have to understand basic concepts from fluid dynamics by rk bansal and thermodynamics. And basically duct and propeller design is a part of engineering. And to be frank... designing a propeller and duct is way more advanced thing. You have to have high knowledge in fluid mechanics and avaiation. So I would recommend you to have basics knowledge in fluid dynamics and thermodynamics. Then you can start your basic design. And leans Ansys CFD software. It will save your lots of time. Ansys CFD is highly recommend for testing for propeller design. Hope you get it...And feel free to ask anything
Yes you are correct, but the problem is I can't test so many of these on actual flying hardware because it will really waste my time and effort. So I have to choose the best one from my bench test. And since I got the best EDF so now I will check it on actual prototype. Hope you got my point sir....😊😊😊 So thanks for watching and don't forget to subscribe 😊😊😊😊
I just came across your channel and I've subscribed. Very excellent work you were doing. I'm in the early stages of making a wind generator could your designs be used for that?
Yes definitely I am going to compare it with the actual prototype. I have ordered it and will soon upload the video. But I need your help....You need to subscribe my channel for it...and press the bell icon....😊😊😊😊 So thanks for watching
Yes definitely they are stronger because though they are also made up of PLA but they are injection molded that means they don't have seperate layers like 3D printed. But good thing is that even the 3D printed propeller can't destruct from the centrifugal force by spinning. 😊😊😊😊😊
Thanks for your suggestion...😊😊 But two blade propeller won't work in this design. It will only work when the propeller dia is about 5 inch or 6 inch. But since our dia is 3 inch then we need more number of blades because the Rpm will be higher. And thanks for watching the video and don't forget to subscribe 😊😊😊😊
Yes it is chargible because currently I am not in the phase for giving it for free because I have to invest lot of time, knowledge and effort to make these videos and youtube doesn't pay me enough to overcome that. But once I get paid enough from youtube than all my files will be free. But notice one thing that my charges are so low as I provide design as well as knowledge about it. Hope you get my point bro... So thanks for watching and don't forget to subscribe 😊😊😊😊
You had mistake in begin of a static blades, behind the impeller. Cose it stops the flow after impeller like a wall. It must redirect flow, for it the static blades must meeting a flow by sharp edge, after that reflow and rectify a vortex to laminate flow on outlet.
The test is incorrect. One thing is clear from these tests - 6 blades of this diameter - the maximum that can be pulled on this engine. Then he just shuts up and turns it slowly. This does not mean that 12 blades give less thrust AT EQUAL SPEEDS. ONLY by measuring at equal RPM, you can understand the meaning of adding blades and the real difference in efficiency. Неверный тест. Из этих тестов видно одно - 6 лопастей этого диаметра - максимум что можно вытянуть на этом двигателе. Дальше он просто затыкается и медленно крутит. Это вовсе не значит, что 12 лопастей меньше дают тяги ПРИ РАВНЫХ ОБОРОТАХ. ТОЛЬКО измеряя на равных оборотах, можно понять смысл добавления лопастей и реальную разницу в кпд.
The most comprehensive EDF testing that I have seen. Very good work!
Thankyou for watching and don't forget to subscribe for more videos like this 😊😊😊😊
Great! But you forgot one very important parameter: the rotor RPM. You should compare thrust at the same rotational speed and measure energy consumption. Static thrust is good to know, but in-flight performance can provide a bit different results. Thanks for shaering the results.
In the construction of a ducted fan, the clearance between the blade tips and the edge of the duct is very critical. The thrust difference that you are measuring is mostly the result of blade tip variation. The variation that can be seen in the images.
To get rid of the variation he would have to print a hub and separate blades like a turbo fan correct?
@@mk6315 That is correct, the way that I understand it.
Has anyone looked at combining the duct and fan so they spin together. Would that improve efficiency?
@@SuperFireMatt Yes and yes. It is just not the design that the author chose to make.
wow you are a great designer glad I found this channel
Thankyou so much....keep supporting...😊😊😊
Well done! Can't wait to try it in my 3D printed drone!
Yes sure do try it ....
Thankyou for watching and don't forget to subscribe 😊😊😊😊
Keep up the great work mate much love from Australia
Thankyou so much...and don't forget to subscribe 😊😊😊😊
i have a patent pending diverting stator. it reduces the flow area and steers the spiralling air to exit straight out. The reduced area increases the exit velocity. There is also an initial buildup of air between the propellor and the diverter. The net result is a higher and larger mass exitng the duct and therefore increased thrust.
Doesn't a Kort nozzle do the same thing? Is your diverter before or AFT the propeller? I can imagine low pressure air at the narrow exit running into high pressure air just outside which would result in vortex flows which counters the result of straightening stator vanes at the exit. Also this increases drag at the exit if the nozzle is long. However there should be a positive thrust pushing forward at the exit. Curious if you have done non static tests as this could be a balancing act!
Great comparison, thank you, it is very helpful for my project. As someone said, RPM is very important factor. We can see something interesting happens here: more blades = more thrust, more current. I can tell that more current = motor more struggling so RPM is lower. At some point (8 blade propeller) current still goes up, but thrust going down, it means that motor over struggling and it losing RPM drastically.
Thankyou so much for your support and don't forget to subscribe 😊😊😊😊
There should be a mechanical iris on the opening of the fans...
It will give an awesome look to it.
it is one of the best video i had seen ever! its very much usefull!
Thankyou so much.....and don't forget to subscribe for more such videos.
😊😊😊
Excellent testing 👍
Thankyou....And don't forget to subscribe for more videos....and do share it ...😊😊😊
@@MechNinja already done :-)
Thankyou so much...😊😊😊
I'm fascinated with your ducted fan experiment.
I think it will be great feature in electric aviation era.
How to get hi-efficiency on generating thrust?
Yeah, still plenty room for experimental design.
Here are my points:
- Get idea from tornado and reverse it.
- Get idea from hair driyer, hot and cold air collided.
- Ducted fan, safer and controllable.
- Thrust vector & auto adjustment
Well, my design just an imagination.
But you can print at will and test it, if you want.
Thankyou for your support.
I will definitely do a deeper research.
Don't forget to subscribe for more videos 😊😊😊😊
On the clearance between fan blade tips and the edge of the dict, why not have the dict and the blade as one piece? The dict also spins around. There in no blade tip vortex and no need for arms holding the duct to the centre.
Yes I can do that but it will reduce the motor rpm as the propeller will become heavier.
Since we can't add much weight to the propeller that's why we can't make that....
If you have any other suggestion then definitely let me know.
And thanks for watching and don't forget to subscribe 😊😊😊😊
Well done young man 64 from arizona
Thankyou so much for watching it.... Do watch my latest video....there are also good...
And don't forget to subscribe 😊😊😊😊
Hi! Can you make a waterproof construction for a SUP board? I think the motor doesn't have to be underwater. Perhaps, as on a hovercraft, he will just push the board
Excellent 💖
Thankyou so much sir...😊😊😊😊
Cool!
Thankyou for watching and don't forget to subscribe 😊😊😊😊
Your videos are so good ❤️👍🏻
Thankyou so much.... people like you keep me motivated....😊😊😊
Are the stators used to created a laminar flow?
Well i have not put that much calculations as it requires the use of CFD analysis
@@MechNinja A laminar flow will be able create more thrust than a turbulent flow.
Great work. Thanks.
Thank you so much...
and do share my videos
and subscribe to my channel for more videos.....:-)
I noticed you have very nice prints. I wonder if you would share your slicer settings?
Yes why not....😊😊
Use cura software...it's free of cost and let all the settings be default.
Then change the speed to 60mm/sec, 0.2 mm layer height and 20% to 30% infill...... that's all
By the way thanks for watching and don't forget to subscribe 😊😊
good job, finaly a good analysis on printed EDFs, use prop dia closest to standard propeller diameter to get best results ! low diameter and high propellers can work equally well. please try it with lower KV motors, something like 920KV
Definitely bro.... don't forget to subscribe
Thnx for your job
Your welcome...
And don't forget to subscribe 😊😊😊😊
Very useful video thank bro
Thank you so much...And don't forget to subscribe......
Hey I’m curious if you measured performance with and without the stator.
Yes i have measured the performance without the stator too...
You can check my previous video for it....
And thankyou for watching the video and don't forget to subscribe 😊😊😊😊
Awesome 😍😍
Thankyou mallu bro ....🤗🤗🤗
Can I know how u designed these edf blades ? Using cfd or some software ,I need to do this for my project and need ur help
I have replicated them from dynamo 70 mm edf design
I love it💓💓
Thankyou so much... don't forget to subscribe
hi Mech Ninja! i am really enjoying your fantastic videos, your tests are really interesting and educational. i don't know enough to know whether the fan design is also suitable for these applications, but if you are looking for a fan design constant to test other variables, the mk.iii from Major Hardware's 3d printed PC fan showdown is one of the best performance designs he has tested (from 100s of designs by now) and has been shared, so it might be a good fan design to work with.
keep it up! i have subscribed and can't wait to see more!
Thankyou for watching my videos and i really appreciate your suggestion. And i will definitely check it.
Thankyou so much...like share and subscribe....😊😊😊
Hello
do you aim to work on the shape of the blades of your rotors?
In order to discover a profile with better finesse
Since I am not good in CFD, hence I generally design the blades using online available data. And for comparing different blades, i use my above data to find the best suitable propeller.
But in future I will be designing and testing them using CFD.
So keep supporting me and stay tuned for more videos...😊😊😊 And don't forget to subscribe 😊😊😊
@@MechNinja 272 / 5 000
Résultats de traduction
OK I understand.
I know that there are different shapes of blades, some of which tend to offer less resistance to rotation, the ratio of electrical power consumed / thrust force produced might be better.
I subscribed
Good continuation
Are you going to try another motor on the backside of the stator? And, are you going to experiment with an hourglass shape between the motors for compression purposes? Or simply reduce the size to make it more funnel shaped? CFD would certainly help answer this. In first thoughts, it would help in 2 areas. First, directed air flow would be more predictable, allowing for design choices around the exhaust area. 2nd, the expanding air at the exhaust could help with backlash or oscillations by pillowing and pushing back on the motor assembly.
Thankyou for your suggestion. I will definitely work with CFD Analysis now because practically testing is time consuming.
So first I will choose the best out of CFD then perform the practical.
Well thankyou for watching and do share it....😊😊😊
Nice
I have 400 kv motor. Please suggest what can i do with it. 🎉
What if you tried out a 7 blade design?
Can you test with actual edf blades? Like plastic molded ones. In my country is impossible to get edfs bigger than 50mm, so I would love to see this edf compared to one you can buy
Yes I have ordered them....but to watch it you have to subscribe 😅😅😅
I will definitely use the commercial available blades and compare both of them...
So thanks for watching and don't forget to subscribe 🙂😊😊🙂
@@MechNinja yea I’m following your channel since the first electric turbine. I’m loving this efds series, keep going
Thankyou so much....just check my robotics series too
@@MechNinja I will
Thankyou 😊😊
are you going to make drone out of them?
I will made it soon!
Yes definitely...my upcoming projects are way more advanced and knowledgeable....so don't forget to subscribe and thanks for watching...😊😊😊
Make a drone using this EDF design
I will made it soon!
From my EDF bro ??
Yes definitely my upcoming projects will be more advanced and knowledgeable...so don't forget to subscribe and thanks for watching....😊😊😊
@@MechNinja I have already subscribed you channel because I like your content 👍👍😇
So 6 blades is the best configuration for maximum trust.
Yes...In my case it is best......if you would like to sahre any other information then do send it....
Thankyou for watching and don't forget to subscribe....😊😊😊
Do you use a filament type 3D printer or resin type? There are some new high strength resins that might be more firm/stronger and reduce flex on the blade and might print lighter which will increase efficiency. Also, it would be interesting to see a 7 blade test. Just my two cents!!
Do you compensate for the weight of the whole structure and the weight of the ducted fan itself?
Can you design x64 blower?
Hi there, I have already designed it. The video will be out by the end of this month.
Don't forget to subscribe
Claro que depende su uso, pero en modelos de aviones, un EDF de 80mm ocupa un buen motor que soporte unos 1600 watts y los nuevos modelos estan saliendo hasta de 2000 watts,
hello, please recommend me book on duct propeller design.
If you are a mechanical engineer....then you have to understand basic concepts from fluid dynamics by rk bansal and thermodynamics.
And basically duct and propeller design is a part of engineering.
And to be frank... designing a propeller and duct is way more advanced thing. You have to have high knowledge in fluid mechanics and avaiation.
So I would recommend you to have basics knowledge in fluid dynamics and thermodynamics.
Then you can start your basic design.
And leans Ansys CFD software. It will save your lots of time. Ansys CFD is highly recommend for testing for propeller design.
Hope you get it...And feel free to ask anything
These really need to be tested with actual flying hardware, not just on a test bench.
Yes you are correct, but the problem is I can't test so many of these on actual flying hardware because it will really waste my time and effort. So I have to choose the best one from my bench test.
And since I got the best EDF so now I will check it on actual prototype.
Hope you got my point sir....😊😊😊
So thanks for watching and don't forget to subscribe 😊😊😊😊
I just came across your channel and I've subscribed. Very excellent work you were doing.
I'm in the early stages of making a wind generator could your designs be used for that?
Very nice! Could you compare thrust of bought edf turbine and 3d printed one?
Yes definitely I am going to compare it with the actual prototype.
I have ordered it and will soon upload the video.
But I need your help....You need to subscribe my channel for it...and press the bell icon....😊😊😊😊
So thanks for watching
@@MechNinja Edfs from factories are usually made with PLA,but they are somehow stronger than 3d printed PLA Edfs
Yes definitely they are stronger because though they are also made up of PLA but they are injection molded that means they don't have seperate layers like 3D printed. But good thing is that even the 3D printed propeller can't destruct from the centrifugal force by spinning.
😊😊😊😊😊
You should try using just two blades
Thanks for your suggestion...😊😊
But two blade propeller won't work in this design.
It will only work when the propeller dia is about 5 inch or 6 inch.
But since our dia is 3 inch then we need more number of blades because the Rpm will be higher.
And thanks for watching the video and don't forget to subscribe 😊😊😊😊
But,why there are too many blades in aeroplane jet engines ????? Are they generates more thrust??
Please make sphere robot with pendulum and camera
Higher power output motor will give you more thrust
Can u share stl?
You can download it from the site....☺️
You make lilium like jet 7 seater
I want you to heat up the air, using heating element,
Let's see how much thrust we get..
Good work. The files are chargible...
Yes it is chargible because currently I am not in the phase for giving it for free because I have to invest lot of time, knowledge and effort to make these videos and youtube doesn't pay me enough to overcome that. But once I get paid enough from youtube than all my files will be free.
But notice one thing that my charges are so low as I provide design as well as knowledge about it.
Hope you get my point bro...
So thanks for watching and don't forget to subscribe 😊😊😊😊
@@MechNinja I completely agree with you. Never throw away the knowledge for free :)
@@MechNinja yes. Right
You had mistake in begin of a static blades, behind the impeller. Cose it stops the flow after impeller like a wall. It must redirect flow, for it the static blades must meeting a flow by sharp edge, after that reflow and rectify a vortex to laminate flow on outlet.
for it you can change the direct blades of impeller or static blades
The test is incorrect. One thing is clear from these tests - 6 blades of this diameter - the maximum that can be pulled on this engine. Then he just shuts up and turns it slowly. This does not mean that 12 blades give less thrust AT EQUAL SPEEDS. ONLY by measuring at equal RPM, you can understand the meaning of adding blades and the real difference in efficiency.
Неверный тест. Из этих тестов видно одно - 6 лопастей этого диаметра - максимум что можно вытянуть на этом двигателе. Дальше он просто затыкается и медленно крутит. Это вовсе не значит, что 12 лопастей меньше дают тяги ПРИ РАВНЫХ ОБОРОТАХ. ТОЛЬКО измеряя на равных оборотах, можно понять смысл добавления лопастей и реальную разницу в кпд.
Hi i also have design 71mm edf have good result on 4S edf approx 1020 grams of thrust my post is available on rc india.
너도 참 말이 많구나. 그래서 비추 하나넣어줌, 내가 10번째구나