Testing If You Can Blow Your Own Sail
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- Опубліковано 1 бер 2024
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Estoy triste porque hoy es mi cumpleanos y no tuve ningun suscriptor.
I like this
E
Yooo
nice
seated for science class
I'm gonna copy your homework in science class
Actual youtube watches mark rober on UA-cam isnt that crazy
Where are the custom 20 million play buttons?
Nice
14 likes
As someone graduated in physics, I have never seen such a clear explanation of what the coriolis effect actually is. Amazing.
dayum
lol
Fact:air is a gas is not a fluid
Somewhat sadly, I feel that he should’ve credited Destin and Derrick since he explained it exactly as they did
@@HRR402VR physics major here, you are mistaking fluid for liquid. A fluid is just a substance that can freely move from force (in the case of air, turbulence or wind).
The leafblower bit actually could work with a specifically designed "sail". If the sail is efficient enough at redirecting the air from moving forwards to moving backwards, then it's essentially equivalent to the fan blowing into a U-shaped pipe, which would expel the air backwards, moving the vehicle forwards. Or, simplifying by removing the pipe altogether, just a fan blowing backwards.
I was thinking the same. My mental image being the clam-shell type thrust reversers, where two plates move into the jet blast forming a "V" which redirects it forward.
Yep.
Look up a "Target-type thrust reversal" for a version that was made by serious professional engineers.
Basically for some Jet Airplanes, turning around the engine is impossible, so they have a mechanism that can basically place an umbrella at the back to redirect thrust forward to help with slowing down a plane on landing.
Isn't a reversed fan what they use for those flat-bottomed air boats in the Florida Everglades?
@@flyingtigers3747 that depends on what you mean by reversed. The propeller on an airboat is simply pointed towards the rear of the boat just like in the video at 6:08
Yup, in fact, airplanes do this when they land.
If only school were as entertaining as Mark's videos...
Oh no it’s X they’re everywhere
OOGA booga
@@Landybryce berbagiwenas @rekaputri
@@Henyahyah baru kenal wenas @rekaputri
@@Wenas2005 yes
Regarding the backpack: when you study vibrations in engineering, you learn that there's a specific frequency in which you can vibrate a spring-mass system where it will not transfer that movement to the mass. That's why there's a "sweet spot", and all the people in the commercials were running with that sweet spot frequency, where the backpack barely moved even while they were running (i.e. the movement of the person was barely transfered to the backpack). This depends on the spring constant of the springs used, and on the mass of the system (the backpack and whatever's inside it). So if Mark were to put more weight in the backpack, he'd have to find a different running frequency in order to get the same effect.
Thanks for sharing all these cool experiments and knowledge with us, Mark! You're awesome!
Now I'm wondering if it was possible to adjust the stiffness of the spring on the fly. It might be completely impossible to do this to a degree where it can be controlled electronically in real time, but it's a fun thought to imagine the backpack changing its spring constant to stay in the sweet spot for any given mass and walking speed.
@@marzipancutter8144 You could probably leverage automotive engineering concepts for this rather than electronically. If you look at suspension, there are progressive springs which as the spring compresses changes the resonant frequency. You can also get dual rate springs, where you have a main spring of one size/rate, and another spring of another below it on the same strut. That would be ideal for riding on the main spring and retaining resonance over the flat, and the shorter stiffer spring for taking the big dips, and again should stop it from falling into another phase frequency. But of course you would still have the issue of the frequency being dependant on the weight of the pack.
I imagine this is exactly how birds can run with their head completely stationary. Their neck muscles are like a spring, and their head is actually bouncing up and down perfectly in sync with their legs.
Lovely reply
My question is how do hikers with long hair keep the hair out of the moving tracks?
I sooooo wish CrunchLabs were around when I was young! Massive respect for doing what your doing Mark!
I think he just released a new box, called the hack pack for teens and adults. You should check it out.
I love it when you wirelessly transfer juicy knowledge to me through a screen that i'm watching. Also my niece and I love crunch labs boxes.
That backpack reminded me, if you walk with your drink, the equal frequency of your steps is building up waves in the mug, so ultimately you spill it. I do my "silly walk" with unevenly distributed steps and it truly helps make my way without spillage. With that walk I basically create waves that go against the waves I already created in the mug, mimicking how active noise cancelling works in ANC headphones.
thanks for the tip!
You should apply to the Ministry of Silly Walks
Deja vu intensifies
I heard that if you grab the mug from the top, it won't slosh as much
I know of the walk you speak of and have had to use it in certain circumstances, but I've had more luck trying to act like a gimble and it's more satisfying when you don't spill XD.
"Does it work when I pour the water?"
LMAO. That guy's reaction was priceless and translated perfectly into 'Ah, crap, you noticed what I was doing.'
I went there with my kids and it looked legit. Thanks Mark for showing the real science.
Hi 😮😂
This has got to be my favourite Mark Rober video ever. such simple explanations on complex subjects.
Mr. Mark, you could definitely become a physics teacher.
You can explain everything a lot simpler than my current professor.
The only problem with this video is that he's wrong about the blowing your own sail thing. You can do that.
@@eggs4561 He's not wrong. There is such a thing as a thrust mechanism that can transfer energy into movement going the same way that the thrust is ejected but it's essentially just a funnel that redirects the flow of air... behind you, which is already what a fan would do if it is pointed behind you without any sail at all. It's also disingenuous to call a funnel a "sail" and that funnel has to be like a pipe, taking the vast majority of energy and looping it around behind the fan to create the same effect as turning the fan around.
These types of designs are called "Target-type thrust reversal systems", which are simply not possible with a traditional sail or umbrella and fan, so no, Mark is correct.
@@DiffYT An umbrella shape redirected enough air backwards to propel you, provided the thrust is enough to push your weight.
@@eggs4561 According to what science? That logically makes no sense. Most of the air would escape sideways and the force of the thrust is pushing equally against the system generating the force as it is pushing opposite against the umbrella. This literally does not work, it is scientifically proven, the only way it would work is if you could funnel ALL of the air being pushed, back behind the thing creating thrust, which in turn, has the exact same effect as just turning the thing generating thrust 180 degrees and ditching the funnel completely. An umbrella is not concave enough to push air backwards, therefore that does not work.
Mark's videos always make me feel smarter after watching them.
First
This video will be 1 on Trending
Did you buy subscribers?
no same
Youre talking to a literal robot @@bexiexz
Mark would be a great science teacher really enthusiastic and explains things great
He is basically Sid the Science Kid in real life
*Mark Rober inspires me... My parents said if I get 25k foIIowers, they'd buy me a professionaI camera for recording... literally begging you guys...* ❤️🍓
@@叵stop begging and it will come
Estoy triste porque hoy es mi cumpleanos y no tuve ningun suscriptor.
Yes, but he reaches more people this way.
Love the way you make sure your contents are educative and fun.
Love you mark . Great work
Thank you Mark! Teaching kids a love of discovery is the most amazing thing in the world!
-high school math teacher.
0:48 "Not just what, but why" is the mantra of every good educator! Thank You Mark!
❤
Unfortunately I don't understand the rope thing as I have dyscalculia. I can do basic maths but even then I struggle with 7 times tables and above (10 and 11 is easy though). I can't do algebra nor trigonometry. Physics is also an issue due to that, biology is the best.
In very simple terms, how does the rope thing work?
@@liliowen2132by rope thing, I assume you mean number five, the belt around the Earth. That's actually simple math, the problem is that we imagine it takes a lot more length to do a thing that actually requires very little. You can simulate this for yourself, take a length of rope or string, hold it against a wall with both thumbs. Take a look at how very little you need to move your thumbs towards each other to make a significant bend in the rope.
"because I'm the teacher and I said so", as (unfortunately) many teachers would say.
After a busy, busy week of school, a Mark Rober video is just the thing I need
@LRmssK4 get a life
smae
Underrated comment
I make better content
Couldn't agree more
I could never fully understand the balloon density illusion till now. The visual effects and explanations are wonderful
I can see why this video has 34 million views to date. Fascinating, easy to watch with interesting facts
Mark is such a treasure for humanity. Imagine how many kids are getting interested in science because of this gem of a human. What a role model!
cant agree more , im 28 and he gets me interested in science XD
Or adults
Only that is speaking so fast that it gives you anxiety in this video 😅
He’s like a new Vsauce
im 16 and this just helps me with science
When I watch Mark's video, I discover more about science.!!. Love your videos, Mark!!
Estoy triste porque hoy es mi cumpleanos y no tuve ningun suscriptor..
But the earth is flat, I saw it !
@@LuCkySlither porque me voy a suscribir si no tienes contenido
@@LuCkySlitherentonces talvez compleanos solo son algo comercial. Lo que passa cuando tu madre ace parear con un multiplo de 365 dias? Nadie.
Cresce
No . Just no.
Short answer, nope. And I applaud this channel for bringing basic physics to the world and our youth. Fantastic channel!
This is incredibly well done. Also, I'm glad someone else appreciates New Shoes!
Bro Mark Rober is the GOAT of science because of how simple he makes science so that everyone can understand.
Thank you Mark Rober!
نقدم فيدهات short قصيرة لحلول اكثر المشاكل شيوعًا في المنزل لايفوتكم باللغة العربية والإنجليزية ❤
Also, see NASA Publication 1207 from 1988.
Specifically, the "Summary", "Introduction" and the "Concluding Remarks" sections, and get back to us on Mark being whatever it is you think he is. Thanks :)
Now if only someone can explain all math, just as simple
I just love the reaction of the sink-tour-guide when he realised that his trick has been uncovered.. 😁
I'm from Vietnam and I really enjoy watching your useful videos
The balloon in the car example is a classic homework problem in my college atmospheric science class! Very happy to see you explaining fluid dynamics in a fun and easy manner, keep up the great work!
True
I’m confused cause the skin of the balloon is denser than the air. I guess it’s the ability of the balloon to move as a lighter “fluid” than air? If the balloons were filled with standard air, we wouldn’t see that counter intuitive movement.
@cbjewelz the balloon doesn't have enough mass to overcome the boyant force produced by the helium because the densitity distance from helium to air is so large, like how a boat filled with air can float on water even though the boat itself weighs a hundred tons because water is so much more dense than air, just on a way smaller scale
Lovely reply
@@cbjewelz yup , if it was regular air then the balloon would move forward
What's more exciting is when people explain science in a practical way without causing headaches, greetings from Indonesia ❤
@michaelsambhi4331 I don't know and don't let it happen
@michaelsambhi4331what a random question. It's not great.
@michaelsambhi4331 I don't have to. It's not fun.
Hello, Indonesia. Still beautiful? Still diverse?
I think it is still nice that the equator demo teaches the concept that is true on a larger scale, even if its just a sham on a lower scale
I feel like a chiild each tie i see one of your video, and i can imagine how a real child will be amazed by it, thank you for your work :) :)
I tried the blowing-your-own-sail thing once when I was a kid with a small engineering set, and it failed. After thinking about it all these years and now seeing this video, I can see and understand why, as cool as that concept is in theory, it's never going to work. Thanks for making this video! I learned a lot of new things that I never knew about math and physics before!
I'm no engineer but the whole time I was wondering...what if a system to divert the intake from the sides? Would that work?
@@waltersmith5293 As long as the fan and sail are mounted on the same boat they pull against each other. If the sail didn’t catch all the air or pushed the air one way or the other the object would move, BUT would the fan be moving the boat or the sail 😂
Only thing is he is completely incorrect about it. It totally is possible, and the concept is used thousands of times every single day in the form of thrust reversers. Any engineer who took a basic fluids course should be able to work out how it work using fairly simple conservations of momentum control volumes.
Interestingly enough, it does actually work sometimes. If the sail is curved then it redirects the airflow from the fan backwards which creates forward momentum. At this point though you may as well just point the fan backwards (like he says in the video). The reason Mark's doesn't work in the video is that the sail he used is flat. So it's directing all the air to the sides so the forces cancel out and doesn't move the boat at all. If he used a curved sail he may have actually seen an effect.
I did this experiment in high school and managed to get a model boat to move.
Edit:
I just saw he used a curved sail in the life size boat.
He probably didn't see a noticeable effect because the fan is too small and the boat has too much mass. Also there was probably wind that was impacting the boat more than the fan.
@@elitravis1619 He needs a whomper
1st time learning the difference between a Cyclone and a Hurricane. I thought one is air, the other is water based.
I thought it was called a typhoon.
me aswell.
You're thinking of tornadoes and hurricanes. Cyclones and hurricanes are both water based, tornadoes not. I had the same confusion for a moment!
Hurricanes and typhoons are both tropical cyclones. The only difference is which side of the international date line the storm was named.
@ELPATO136 And hopefully it stays that way for another few birthdays until you grow up and away from begging.
I was literally about to comment that capital fact about the sound when I saw you already had it in there. I’ve stood in that spot and the tour guide walked across the room and started barely talking and we heard every single word she said. It’s incredible.
4:51 Graze the roof. It is one of my favorite music
Mark and MrBeast and Mark collab in the same day??
Yoo
Why did you put mark twice
And Ryan Trahan.
and ryan trahan
Hi
Mark is the best because he always teaches you WHY. Which arguably more important than knowing WHAT because it allows to use those theories in multiple areas!
I know you're an amazing engineer but the work you are doing here is truly incredible and what will define our future
Thanks Mark! I'll have something to show to my kinds in the future
Thanks for coming by In-N-Out , I was the gentleman that took a picture with you and your family... I was calling out the numbers😁
@@envycollar sowwy :3
@@swabla240No he shook his hand!!!! it was cool
@@swabla240 Why would you make such a pessimistic comment? I've heard Mark loves his fans.
@@mitchtalmadge ye but im probs his favorite fan anyway!!
@@swabla240lol you’re a troll
Came here for one clip, stayed for the whole video.
Same here
It’s like mark knows how to grab audience ha
Came for Mark Rober... Wait
Realllll
Same
I haven't been this mind blown by a video in a while, just WOW
I felt so proud of myself when I realized the pi thing...This guy's just an incredible teacher.
The Sheer disappointment in his looks after saying "As we all know the earth is... A sphere ಠ_ಠ" Too hilarious. I appreciate your videos Mark
Flat earthers: And I took that personally
@@danti2563 I don't understand why he'd say that. As a former NASA engineer he should obviously know the Earth is shaped like a doughnut
@@chaks2432 You misspelled "Cube" pal.
@@user-zl1vf4me1p i think you meant "Triangle"
@@bananapeel908velociraptor*
Mark helped shape my childhood and my big brothers childhood, you are one of the best UA-camrs on this platform
This video will be #2 on Trending
Why is my comments keep getting removed every time I tried to post on this video?
I completely agree with this
facto
Ok
This video is not for flat earthers.
Mark single handedly has educated more kids in America in the last year than the entire American educational system combined. 👍👍
He taught me more
Nah the whole world
日本にも技術届いてます😊
Of course this is what happens when you put most of your time into watching yt videos, rather than focusing on your study.
@@JebbyVRlol not Europe
This guy made me understand the coriolis effect in a minute rather than 2 whole months of my aviation degree
Came here too comment that😂
I've heard of the Coriolis effect before but never understood what it was suppose to mean
You must have really awful professors then, or maybe you need to re-evaluate your choice of degree
@@rbesfe well an aviation professor vs a literal ex nasa scientist, who do you think the better teacher will be the guy who teaches about planes and aviation or the guy that literally helped with parts to spacecraft
@@randykeith1203 Coriolis effect generally refers to how Earth's axial rotation affects various phenomenas around us
You've made more imporatnt videos, but this one is just so juicy!!!! love it!
17 minutes of my life well spent. This is content worthy to be on UA-cam, not social media type BS that poisons our mind.
You not sigma
You very sigma
I learned so many new things just by watching this UA-cam video. That hasn't happened in a long while.
didn't you go to school? everything he tells, schoolchildren in my country study in the first 5 grades of education (they learn this before the age of 12)
@@que5646 Yeah, sure, I am pretty sure people in your country (like everyone else in the world) would still be tricked by some phenomena mentioned in the video, especially the balloon in the car or the rope around the earth because people do not spend enough time to really think about it. Sometimes, the answer is counter-intuitive and people generally go with their intuitions, even when it is wrong.
Anyway, there was no need to be obnoxious but hey, maybe you learned to be like that before the age of 12.
@@que5646 Wish our education system was this interesting, nothing in our curriculum was remotely like this. Some of it like the balloon, I guessed corrected what would happen, but nope our education system is terrible.
@@que5646 That's great for you! Too bad not everyone in the world is given equal starting points in education.
I'm also curious how much of that information you think you can recall, say, 20 years down the road?
I love how the bigger your lab gets, the simpler phenomenon you make in the show. And that's the beauty of getting big. You can make things that's already simple even simpler, which is harder than simplifying complicated stuffs.
Thanks for always teaching us something new
Excellent work, Mark!
That was a sinking pour performance on their part.
*Laughs in aristocratic Leonardo DiCaprio meme*
An OG educational video! My favourite type and part of the reason I'm in mechanical engineering school now. Thanks, Mark!
Thanks for the challenge of dredging back through my memory to 50yrs ago when learning about physics in school, and surprisingly I did figure out correctly the answers to all those questions you asked!
Your enthusiasm for sharing your knowledge with youngsters is absolutely commendable and a great example for those considering educational careers!
I don't know how much longer smiling Jimmy is going to be smiling.
Everything is always on point. Can't get enough!
As a Mechanical engineer my self your videos are bringing joy to my heart and soul. Keep it up buddy! Love your squirrel park.
Господин инженер-механик... А что вы думаете насчёт проблемы паруса и вентилятора? Поплывет лодка? Я просто юрист, но мы, юристы, дотошные и доскональные.
2:48 that was so funny because I actually got a tour of my brother on the capital and he knew about this and I was able to hear him clearly when he was whispering. It was pretty cool!
12:18 Having been to that exact place in Quito, I can confirm it flows different ways, and even on the Equator, it flows straight down
You can also balance an egg on the equator
You must have broken physical reality then. 🤔
His videos have such a clear explanation a toddler can even understand it
Marks videos inspire so many kids and makes learning science so much fun! Love the videos!
He is such an awesome influence
WOW
Science is a religion for goons. Leave those kids alone!
😂😂@@kwimms
❤❤❤❤❤
Im 13(14 this year) and never been interested in physics, but a few years ago when i found Mark's yt channel i remember when he was making the squirrel series and now my dream job is to be an engineer! Im bummed that i cant get hi monthly kits, bc i live in a small country called Latvia, which is completely on the other side of the world, so shipping would cost a lot. i just think that Mark is an amazing human being and his videos are one of the few actually useful and educating videos on youtube! 4 years ago i didn't know anything about physics, but now my main monthly event that i can't wait for is watching mark's new video!
I found another science based channel as well! It's called kursgesagt.
noob
That is so cool! You will be a great engineer some day!
okay, im gonna go cry to sleep now and tell my mommy abt you😢@@blurry2246
Nice! Keep learning, stay curious and resilient!
This is how I get my My daily science, this is pretty awesome thank you for these videos Mark Rober keep making science videos
If this is how science is taught in schools, unironically more kids will want to become scientists
Loved the video. The physics stuff was cool, but what I really enjoyed was your enthusiasm. Love the energy.
hello
I am a second year middle school student in Korea and a student who participates in the sunpla hanging exercise.
Mark ROBER
Thank you for always uploading interesting science videos and providing a wealth of knowledge.
Always upload interesting videos and work hard.
Hi Korean dude
Another thing related to relative density is
BiConvex(primarily converging) lenses when put in medium denser than the lens itself, diverges light. And biconcave lenses converge light in denser mediums than lens
That's the best explanation of the Coriolis effect I have ever seen
Your explanation of Coriolis effect is really clear. I cannot explain like you even I am a physicist. Thank you.
Impressive dedication and thoroughness with which the myths were debunked. Learning was made even more interesting by not just revealing the answers, but demonstrating how they were acquired.
Estoy triste porque hoy es mi cumpleanos y no tuve ningun.
Suscriptor.
Dont Like This
what is this chatgpt comment
Estoy triste porgue hoy es mi
cumlpeanos y no tuve ningun
Suscriptor
But he got blowing your own sail part wrong. Blowing your own sail does work, just not efficient. We have reverse thrusters on planes that use that principal. It's not like pulling yourself up by pulling on your hair. The energy is contained within the system. Blowing your own sail has energy escaping the system, just that most are going sideways with a little going backwards, hence the inefficiency.
I love the way you make your videos. Great Work!❤
I always love the way you explain science!
Mark Rober is really just out here being the new Science Guy. Getting a whole bunch of people interested and passionate about science. What a legend.
new??? mark rober has been here almost since the beginning of youtube
FYI - New "Science Guy" as in Bill Nuy, not new to the Internet@@autistacat
@sarzidev9487 Bill Nye the science guy is the science guy before UA-cam even launched
@@gabrielperez1199BILL NYE THE SCIENCE GUY! BIIIILLLLL NYYYYEEEEE THE SCIENCE GUYYY! BILL BILL BILL BILL BILL BILL, BILL NYE THE SCIENCE GUY! He will FOREVER be the ORIGINAL science guy! I don’t think I’ll ever forget that legendary theme song.
Not to take away from how awesome and legendary Mark Rober is, he just wasn’t the first.
i like how i actually know and studied all this stuff and still like watching the whole video because of how you explain stuff. :D
I like the Albert Einstein quote that goes “Genius is making complex ideas simple, not making simple ideas complex.” I feel like this perfectly encapsulates Mark and his videos.
The way i screamed when i saw the horse's I LOVE HORSE'S ❤❤❤❤❤and mark is my favorite person to watch if it involves experiments
I loved this type of video! Learned a bunch of random scientific knowledge is a super interesting and fun way
As always, such a great video!
Loved watching your channel!
raw asf
rip grant
Berbagi wenas @rekaputri
@@MrFoxStories dekat Aqiss ft Rafi @rekaputri
I started studying about an ellipse after watching this video and i have to say, an ellipse is now my favourite geometric shape too
Finally someone does the experiment! My inner child is happy
I come from Vietnam🇻🇳🇻🇳🇻🇳. And I've been waiting for your videos forever, I've watched all of your videos, they're really interesting, smart and erudite . I wish you could make more videos. I have shared your videos with everyone in Vietnam. Your videos are amazing!!!!. Mark Rober, good job 👍💪💪
Me too bro, me tooo. Please ship those boxes to vietnam please!
This is the best video yet! Getting back to basics. Making science interesting again!
thk you for putting so much time and energy it to making more young scientist.
This might be the best channel on UA-cam
This is the best video yet!
first
second
7:20
only, if you change the shape of the sail a little bit, it suddenly does work. because then it funnels all that air backwards around the fan.
target thrust reverse?
Still better pointing it backwards since you'll inevitably lose some energy to friction as it redirects 180
@@chaoswraiththat's not the point. It's not about whether it's better or not, it's about if it works at all and this was misrepresented in the example with the umbrella.
This would totally work even without and electric skateboard if you do it correctly
@@stefan514 i feel like the testing should have been focused on whether the "thrust reverser" in the form of the umbrella would actually be enough to overcome the friction to actually get the whole thing to move.
Well, yes, just like a simple U-shaped pipe would make it work.
Ah dang it, you got me again! Taught me stuff while I was distracted!
I'm Chinese, your videos are very wonderful and meaningful! Thank you!
I love this guy. Mark Rober gives us so much fantastic energy from his presentations, yeah actually gets me Jazzed like a little kid! You earned a dedicated viewer Mark!!!
This is one of the coolest videos I’ve watched in a long time. Physics is just so cool
RIP Globe
_ 2015_ we have 200 Proof ON Every Platform!
LOL @ coriolus force tourist trap... I'll have to do that at a party someday.
Great demos - I dunno, aleays thought a fan would move a sailboat, dunno why....😊
there is a much better experiment with a leaves blower. It inhales the air from the side and exhales it into the sails, so the boat moves quite nicely.
I'm from Ecuador and it fills me with joy to see that you came to my country. You're the best.
Guayaquil here
Quito herw
Loja is here
Cuenca y Ambato here
Not Nate messing up the watermelon catch again 😭 6:25
bruh
Hello! This is the first video that I watch from this channel and I loved the content. I normally prefer wathing videos or movies with original audio. But as a Turk and a Dubbing Enthusiast, I would like to say that Turkish Dubbing in this video is perfect! Thanks to all who worked on this.
Mark rober is the science teacher we all need
Blowing your own sail, while wildly inefficient, does actually work with a traditional CURVED sail. The curve captures the air from the fan and redirects some of it backwards, which provides a small amount of net thrust in the opposite direction of the fan. Love the channel, but I would really appreciate Mark revisiting and clarifying this
He should have mentioned the reverse thrust on a jet engine
Yeah exactly, with thrust reversers being a nice example.
He literally did it on a real boat with curved sails and nothing happened?
@@MrGamelover23Might be because of the positioning of the fan and its size. The fan was much lower than the sail, so the air would be redirected more upward, and perhaps the since the fan was close in size to the sail the air flow from the fan would disrupt the redirected air from the sail.
does that mean that the leafblower & umbrella might work without the motorised skateboard?@@cuddlestsq2730
The demonstrating practical experiences makes the video pure gold.❤
Indonesiaku wenas @rekaputri
🙂Я просто хочу получать удовольствие от жизни! Я не хочу хамить, скандалить и что-то кому-то доказывать, не хочу тратить время на общение с теми, кто мне неприятен, с людьми, которые меня не понимают, и пытаться достучаться до них. Не хочу пытаться вмещать свои мысли в чужую голову. Мне некогда! Я хочу жить своим настоящим. Я просто хочу ЖИТЬ! Радоваться каждому моменту, каждой улыбке прохожего, каждому дню, в независимости от того, солнечный он или дождливый. И очень не хочется разменивать эту потрясающую жизнь на пустоту, мелочи и бессмыслицу….
@@showpavelraevsky4971 Indonesiaku wenas @rekaputri