Testing 15 Lego Propellers - Lego Technic
ฝัง
- เผยแพร่เมื่อ 4 พ.ค. 2024
- Join me as I explore the exciting world of Lego propellers, testing classic and custom designs for performance and durability. Witness toy engineering at its finest as I push the boundaries and unveil the secrets behind these innovative creations in action.
00:00 Let's make some noise!
00:20 Propeller 2 Blade 9 Diameter
01:20 Propeller 2 Blade 9 Diameter x2
01:59 Propeller 7 Blade 6 Diameter
02:14 Propeller 3 Blade 3 Diameter
02:32 Propeller 3 Blade 5 Diameter
02:54 Propeller 3 Blade 9 Diameter
03:29 Propeller 3 Blade 9 Diameter x2
04:02 Propeller 3 Blade 9 Diameter x4
04:39 Model "Cross"
05:01 Propeller 3 Blade 13 Diameter
05:36 Model "Wheel"
06:23 Model "WW"
06:44 Model "Saw"
07:12 Propeller 1 Blade 14L with Two Pin Holes x3
07:52 Propeller 1 Blade 14L with Two Pin Holes x6
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/ @drengine - วิทยาศาสตร์และเทคโนโลยี
I have been curious about how the size and shape of a propeller affect its efficiency for a long time. I tested some propellers that I found in my drawer. I hope you find my experiment interesting!
It was educational and fun! Thank you!👍👍👍
It was fun, but it felt like it lacked the basic understanding of aerodynamics. I suggest you try the same tests next using smoke, then you'll understand a lot of misconceptions about how these stuff works. Like why the ball did not move close to the propeller but was sped up at a distance, or why non wing like "propellers" did not work.
@DrEngine It was very interesting! Thank you!
4:40 As a building tip, though, when building custom-made propellers using LEGO Technic panels like this, try not to build perpendicular to the axis of rotation like you did in this video, as the centrifugal force acts outwards on the propeller blades. What I mean by that is, try using pairs of either the 3L Technic universal joints (for controllable and variable-pitch propellers) or the 3L Technic angled axle connectors to mount the blades parallel to the axle or axis of rotation, and reinforce the blade connections on both the bottom and top halves of the propeller hub. 3L Perpendicular Pin and Axle connectors can be used to mount the blades onto the hub. I've found that this design is much more resistant to centrifugal force and can hence spin at much higher speeds (even ludicrous BuWizz or buggy motor speeds) without breaking apart. I will provide links to the parts I am talking about below.
www.bricklink.com/v2/catalog/catalogitem.page?P=42003#T=S&O={%22iconly%22:0}
www.bricklink.com/v2/catalog/catalogitem.page?P=32016#T=S&O={%22iconly%22:0}
www.bricklink.com/v2/catalog/catalogitem.page?P=62520c01#T=S&O={%22iconly%22:0}
Hopefully this helps! :)
@@Sonnell The ball did not move closer to the propeller because thrust from the propeller was exerting a forward force on the ball until the force of gravity interrupted the ball's motion (on steeper inclines). And non-wing propellers can work as long as each blade is set an angle, they are just less efficient than propellers with more aerodynamic blade types. Moreover, the propeller failure at timestamp 4:40 resulted from a structural integrity issue directly related to the propeller's design, not its aerodynamic performance. Centrifugal force acted outwards on the blades and overcame the frictional forces that held those blades to the propeller hub.
Very funny Videos! 😊
You have been running some props in the wrong direction. Best test them in both directions
Also different amounts of power in each run.
go-go gagit pixel reducer 0:01
OH NO THE PIXELS! WHERE THEY'RE GOING?!
[screams in 8p]
The wind detector falling over was a task failed successfully
4:21 THAT COUNTS???? hahahha aah omg you got me good
Lmfao
I see several ways this test can be improved.
1) The tilted track means that at the higher levels, the propeller is no longer blowing along the axis of travel. A better setup would be if the track was attached directly to the motor frame, and the entire assembly was tilted.
2) Not all of the tests were at the same distance from the axis of rotation. A better setup would be three tracks, one at the bottom edge of the propeller, one at the center, and one at the top. The bottom one would trap air against the track, while the top would not, allowing comparison.
3) There are no really useful metrics. For an apples to apples comparison, make the track(s) longer, tilt them at 30 or 45 degrees, and attach a scale to the tracks. The propeller pushes the balls up the track, but it is long enough that the ball(s) 7:43 eventually stalls before reaching the end of the track. Measure the distance to get a comparable metric.
Amazing tips, thank you!
also have the same amount of power behind each of the fans instead of changing it. that really messes it up when available power is changing (some of the earlier fans would have benefitted from more power but you didn't give them it then you gave later ones more power) unless you did keep the same number moters
Your design choice to put the 3 flags along the ramp really drew me in: Flag 1, Flag 2, Flag 3, The Box!!! Loved it ~ thank you 😊
Glad you like them!
hi
+1 for the Hot Wheels track! Such a bummer to spend the time build up something like the 'wheel' only to find it completely ineffective. All AFOLs know this pain. Thank you!
You have to tilt the rotor as much as the slope to keep the force and it's vector constant
Many of the props you have running in reverse. Take note of the aerofoil. The rounded edge leads the way. NOT the sharp edge.
Had you used a snail scroll blower, you'd have sent that ping pong ball vertical.
It’d be cool to compare ducted designs! Or maybe even multi-stage setups with progressive RPM on the addition fan stages? Or additional vanes after the fan to create laminar flow, which would increase the distance the air travels?
the effort put into these videos is amazing
Another amazing feat of LEGO engineering!
Absolutely loved this video since I always wanted to know which propeller worked best
Great to hear!
greate video bro!👍👍
Thanks! 👍
More blades doesn't equal more wind. It's actually negatively affecting the amount of moved air by decreasing the efficiency of the vortex. Same reason boats or wind turbines usually only have 3 blades on a propeller. It's a fascinating science actually. I recommend looking it up.
So, What makes more blades?
bro had such a good first try that it took a redesign and 9 other tries to beat it lmao
For some runs with small propellers, especially where they do not hit ~70% of max RPM, it would be good to test to remove the last reductor stage, for more torque & less friction
今学校で歯車使った学習してるからこのすごさがすごくわかる😊
4:37 cool
Thank you so much for the informative video! The video quality is incredibly high! I am impressed!!!
Glad you enjoyed it!
Hey the flaps on the fan you maid is reversed that's why it didn't work@@DrEngine
It's a bit of a flawed test, not only because the ball will just let the air flow around it and/or leave the air current as it ascends.
Perhaps try propeller designs on a vehicle on rails, then you can measure both the weight and speed the designs can move?
I found this video very interesting.
Thanks
You might want to try one (or more) of your propellers with a single motor and different gear ratios.
There will be a 'sweet spot' where
'matching' the propeller to the motor is best.
Just a thought
Thanks for the tips!
I'm gonna use the Propeller 3 blade 13 diameter as my fan
If RPM's drops from maximum and wind speed stays almost same going to different propeller, than it tels you, you have not enought power. First few tests is not valid due to motor not being powerfull enought to drive all attached propellers at 11k rpm's. At that point you are not testing propellers, but motor.
or shows the influence of the propeller on the engine ;)
He needs to use a brushless motor or put more motors
1:01
One must imagine Sisyphus happy
There is a maximum power for the first half of the tests. A more effective prop takes more power so you end up with nothing but the 2 blade getting past 5 until the ducted fans.
There’s official Leto rotor pieces, many from Lego city helicopters, would be cool to see them
7:55 that "flop" made my day! 😂 so unexpected, yet so incredibly funny!!😂😂
Everybody do the flop
Great propeller invention
The wheel is pretty much just a large centrifugal fan which pulls air through the middle and flings it to the outside. You usually see them inside a cowling with one outlet for directing all that airflow to one area (usually inside someplace that needs cooling)
Thanks for the info!
Great video! However, like all your previous ones👍🔥
Glad you like them!
I enjoyed this video, but I would also like if you performed the tests again with more scientific rigor, using some of the comment suggestions like testing all the blades flipped around too, aligning the fan direction with the incline, and testing different gearing for the fans to see which gearing works best for each one.
love your channel
Maybe try to make a cilinder around some of them to funnel the wind?
Nice suggestion!
That one Propeller just ripped apart
I noticed(as some others have also stated) that some of the propellers seemed to have been spun backwards
Wouldnt the Propeller 3 Blade 13 Diameter work better flipped around? Im just judging by the shape of the blades. Wouldnt it also be able to take in more air because of the curve?
Lego x HotWheels x White Ball, never expected such a collab!
6:10 bro just want to move near the ball 💀
now make a flying plane built out of lego using this knowledge... It's probably impossible but with enough wing span and really light build, maybe the body just made out of cross axle rods and some fabric or vinyl for wings, and using a small non-lego motor with small battery it could be possible. Or maybe a rubber band plane? Would be cool Lego achievement nonetheless.
The lego one is like a sounds like helicopter propeller broking
The first level five edged me so bad bro
Most ships used three blades, because the drag lower the rpm and use more fuel
I know this might be extremely hard to do but what if you tried Contra-rotating props? The Antonov an70 has them
8:19 Why don't the levels fit with the wind speeds?
6:42 turning OSHA into OSHI-
How does that work?
Is the Model "WW" model a "Water Wheel" ?
You should have angled the fans with the ramp
I like the idea but you really should’ve made a stronger structure for the big heavy propellers and held them down to use them most effectively
What camera are you using?
my fyp be like! he woill watch anything
adding more blades increases the drag
can you do a drone next??
i am a big fan of your woke kip it up😁
Now build a plane that can fly
The more complicated propellers cause more turbulence than airflow
Amazing ❤❤
Thank you! Cheers!
Planetary gearbox/gearset when?
Amazing video ❤
Part 2 with counter rotating blades
Noted!
I think a small propeller might've done it too if it had a cowl around it.
2 of those are boat propellers, not aircraft.
Wouldn't it make sense to tilt the propellor in line to the desired direction of travel of the ball?
You might have a propellor capable of lifting the ball vertically, but if you put the rail perpendicular, the ball won't move...
Nahw, you forgot to turn the white rotor blades by 90° - it will push much more are (and also creating much more resistance :D)
Besides that little miss it isnice content, thanks ♥
Thanks for the tip!
Why didn't you use counter-rotating propellers?
6:12 i think your spinning the "wheel" the wrong way
Wow! You’re doing great work and I hope you are able to best! 😊
Thank you so much!
The truth is that having many blades does not mean the wind will be strong
Nice!
4:20 - Screw it
go-go gadget pixel reducer
very cool
Cool
For some reason the white ones seem to work best
Model wheel = Model washing machine
Increasing the number of blades does not always lead to better results... 🤔
Algumas helices foram montadas ao contrario. Helice tem lado e isso influencia drasticamente no resultado. O lado da pá que é convexo deve ficar virado pra onde entra o ar na hélice, o lado concavo deve ficar virado pra onde o ar sai.
Have you tried combining solar panel with Lego?😎👍
looks like size really does matter
try to use a toroidal propeller it is way more efficient
And now, we know. 😂
He will be hired by pratt & withney and lego
nice
2:14 that use for water
7:56 bro make an whole tornado
No measurement of thrust force as well as velocity
4:22 cheating
Use a regular fan
Steell blade more effective
Nuevo suscriptor
I just saw this and wanted to comment
1 : 12.6
now test them on water
Nice suggestion! Thank you ☺️
@@DrEngine your welcome
omg😆😁😄
9 inch diameter. Def not
I don't think it was diameter in inches, I think it was diameter in lego studs.
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video is kind of anti climatic
i see what you did there
Cool
nice
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