Is It Possible To Blow Your Own Sail?
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- Опубліковано 25 жов 2020
- In this video I check if it is possible to blow your own sail. This is based on the video that has been showing up about a janitor that used an umbrella and a leaf blower to propel himself forward. Let's see if it actually works!
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*Any experiment you try is at YOUR OWN RISK. The Action Lab assumes no responsibility for any injury if you attempt anything you see in this video or on The Action Lab channel. - Наука та технологія
Hey everyone, you will notice that on the scale with the "sail" on we got -3 grams. This means that some of the air bounces off the sail and gives a small amount of thrust in the forward direction. If you have a completely curved sail that directs all the wind backwards then you can redirect your thrust backwards and move forward. However, the point is that you will always get more thrust by just pointing your fan the other direction. And no, the guy with the umbrella is not creating enough thrust hitting the umbrella to move forward. The way he goes forward is called an electric skateboard:)
Makes sense
and those false videos gets millions of views, that goes to show the amount of fools.
I figured it was just within the margin of error
Oh, wow, an Electric Skateboard, that is cheating :P
Spoiler alert (don't read the comment before you see the video LOL)
"That's our neighbour going at it again"
Lol nice name
Had us in the first half ngl
...”but this time he’s seems like he’s out of it”
Dude doesn't own or know what an umbrella is? Lol
U almost got me with your name. 32 years
Neighbors: "Honey lock the doors that crazy freak is trying to fly now"
Fac
{]213
lol
Omg!!
LMAO
4:00 Captain James,
Pirates of the action lab😂❤️
Harry was right Vik owes him 50 quid
yea lol
No the action lab guy is wrong see his more recent video on same topic he corrected himself
Would have been cool to demonstrate what happens if your friend holds and blows the blower at your sail with the blower disconnected from the vehicle :)
Then both you and your friend would move because the force from your friend holding the leafblower would push you and the "recoil" force from the sail would also push him back.
This would create thrust but only for a short period of time since the source would be moving away just as fast (if we ignore friction and your friend skipped leg day and just flies away) as the object its propelling (the vehicle with the sail)
RIIIIGHT
As if he has friends (joke)
Your wish is granted... : 3:57 ... a pretty big blower with high volume and low velocity.
@@kekistan6762 the last time we ignored friction was in science class. Or was it math? I didn't pay much attention in school.
Could you try doing this with a curved sail, similar to the umbrella used in the original video? That way, I believe, it would become more streamlined and not negate all the force from the blower?
It wont work
still wont work.. look at the airline jet engines when they land they use similar air brakes . and they angle it to control the braking.
Just the opposite the airlines use it for reverse thrust so it %100 does work@@ARUNMANOJ86
Just bought the experiment book you wrote with your wife. Excited to do those experiments with my son! After watching your anti-bubble video I repeated it with him. We really enjoyed doing it together!
Seekng this........
"NEWTON'S THIRD LAW" - Crying in the dark corner 😂😂😂
R.I.P.
Same!
Beaten by the Mythbusters first.
Hahhaha
No bro, why?
,it follow 3rd law only.
If doubt the watch the video clearly!
Newton be like:
Hold up, wait a minute
I recall an episode of myth busters where they were able to blow their own sail. But the boat moved very slow, and it was a super-duper high powered fan
They used a mini jet engine.
I posted a reply of that clip.
Here's my thoughts on why it worked (and how Action Lab failed to show the bigger picture. His experiment is very important though. It demonstrates physics as accurately as the Mythbusters.)
I'll put this as simple and short as possible.
First, a flat sail with a air flow going directly at it will generally direct the air to the left and right equally. If you direct air on the left side of a flat sail, then it will push right. If you direct air on the right side of a flat sail it will push left. Action Lab used a vehicle that didn't want to go left of right because I believe the wheels were locked in place.
Second, his sail was flat so even when the air is directed to the left, right , or both; very little of that propulsion is pushing backwards. Using a heavily concaved sail doesn't force the air mostly to the left or right. It's mostly forced backwards.
So to maximize thrust forward you need to be able to turn. And you need a concave sail so that some of that the available airflow goes in the opposite direct as the fan.
_________________________________________
It's also worth noting thaton a flat sail it's applying a force on the left side of the vehicle in the front. This will make the back end rotate to the right and thus turn to the left. (and vice versa). BUT with a concave sail aiming to the left most of the air wraps around the sail and shoots of to right and backwards. This cause the vehicle to be pushed forwards and to the left (and vice versa).
I am not a physicist. Don't take my word for any of this. I am just a guy that thinks Action Lab focused on a sliver of physics because it was important aspect of it. But he didn't delve into how these simple physics can be manipulated into doing unexpected things.
4:06 *the best pirate you'll ever see.*
Meanwhile his neighbor: Oh its him going at it again
I knew the answer from the theoretical point of view, but it is always nice to see that the experimental data matches with our models.
Your sail was a different shape from the one in the video. The curve of the umbrella sends the air backwards instead of to the side. This can provide a small amount of thrust. It's very inefficient, but it can be done.
That's what I was wondering about. I wish he'd done the experiment using the umbrella shape.
@@crc9564 That's what I said. "It would be very inefficient."
Yeah, I'm quite unhappy about that. Annoyed to say the least. If you are gonna go myth-busting, missing details like this destroys your own credibility. He's not wrong about why the flat sail doesn't work, but that isn't the point. With the flat sail, all the wind is being diverted evenly to both sides as well. All in all bad video this.
The guy is on a electric skateboard imo
@@the.littlest.toaster That's possible, but it still doesn't excuse the sloppy testing. If you want to disprove something, you can't change the variables like that. If he tries it out and it doesn't work, I'll accept that, but considering the Mythbusters tried it and succeeded (albeit with boats instead of skateboards), I have my doubts.
MOMMY! THE CREEPY MAN NEXT DOOR IS TRYING TO FLY. . .
90s kids - "Haha cool. Look at that man. He's making stuff, maybe he can make us a go-kart if we offer to mow his lawn."
Kids today - "Thats too scary and creepy. I'm going to stay indoors instead."
...Such a depressing world we live in now. Everyone's scared of everything. We're going to be in the dark ages again if this attitude doesn't change soon.
I agree with you,@@HelloKittyFanMan.
Great video! Short, sweet, and to the point.
Mythbusters actually tested this and they DID get forwards, if they just had enough big and curved sail.
*I READ THAT VIDEO TITLE VERRRY DIFFERENTLY LOL*
I read it snail
Your defo too young to understand what he was talking bout
SLiT
I’m 14 year old and I didn’t understand
@@dhiegosegundo2303 I'm 15 and I understood it
But what about the thrust reversers in Aircraft engines, Always puzzled about that...
its not a flat wall being acted upon like in this video, its curved contraption that redirects the the force in a different direction.
@@Black70Fastback like an umbrella?
@@cosmicrider5898 lol, yes, somewhat
Captain Joe does a good explanation of how the TR's work ua-cam.com/video/cfFZ2-Am-Zk/v-deo.html
Running the TR's from a mechanics perspective. ua-cam.com/video/Npd5F80FNXA/v-deo.html
Saw a video like that and that's how I ended up here. Thanks for testing it, was very confused for a second there!
This was a question at one of my physics test when i was in highschool. Your content is so cool! Amazing channel
Nah, I tried once but I couldn't bend far enou- Oh, sail.
Wtf lol 😂
@@vedantawasthi5410 ha ha ah
Didn't get it
@@seven4280 It's alright, OP didn't either.
R/holup
you need the sail to be bent so that the air get's thrown towards the back instead of towards the side, then it works. try it again with an umbrella
or.. you can just point the leaf-blower to the back and enjoy a better efficiency
The way reversers work on jet engines (or on jet boats).
@@PronteCo Agreed, but you're not going to get a million hits these days using that technique :)
Thank you you even said just like in the video this was nothing like in the video
Thats not going to make a difference. There is a principle that allows a body to blow on its own specially shaped sail and produce movement, but for a given power source its always mote efficient to just directly use the power source to produce direct thrust. The man in the mop bucket had a scheme going on.
That's the greatest pirate I've ever seen.
So it may seem.
4:00 *pirates of the Caribbean theme plays*
You are the best Man, thanks for making it clear for us!
When I was a child I used to wonder if I could row a toy boat in a tub from outside and it would go forwards. Childhood innocence haha
Lmao me too
Must have been nice.. when I was a child I had 2 jobs, 3 kids, a girlfriend and a wife on the side...
@@randyman78596 and two lambos. I made a billion dollars an hour, I also helped Apple get out of financial ruin. And here's how you can do it : BuY mY bOoK aNd OnLiNe CoUrSe (no refunds)
For some reason I'm having a hard time picturing what you mean. Could you try to explain it more? Lol, I swear I'm not dumb, but I'm really curious what you mean?
Yes, please explain
Instead of a plane board of it was curved then the kart would move, depending on curvature. Jet planes use that for reverse thrusters.
Exactly what I first thoughts where parabolic shape like the umbrella
Doesn't matter
The point is that the force of the leaf blower is accelerating backwards, and any air dispersed from the umbrella would have less force than the leaf blower. The guy with the umbrella just had a motorized board
The whole point of thrust reversal is to negate the propulsion thrust by applying opposite force which is what exactly happening in the small prototype, the thing is that the cart is already at rest or say equilibrium
Mechanical Thrust reversal deploy just in front of nozzle and make use of hot jet Impulse to achieve this
Aerodynamic Thrust reversal are extended around the periphery of jet engine and make the use of cold Secondary air reaction to achieve this
End result is same but the Mode of reversal is different
However thrust reversal are generally not recommend to use by FAA and generally Spoilers, wheel friction and disk brakes are used to achieve necessary braking
Under severe circumstances the use of thrust reversal is done
@@cakeyeater7392 The leafblower sucks in air from below, not behind, so ideally there is no thrust backwards, only really inefficient thrust forwards.
Thank you for answering this question. I always wondered if you put a fan on a toy sail boat if it could push itself. So i guess the answer would be whatever pushes the sail needs to be off the boat.
Great idea for a video!! Thank you
james: "now only if i could steer"
ominous voice: "goodbye james"
I think that when he shoots the air to the umbrella with the air blower , due to the shape of a parabola ,the air is deflected to the back and it pushes the vehicle forward.And it didn't work because you were using a flat sail
Indeed exactly my thoughts, the thrust was sideways and equal.
You should try it and I think you will figure out pretty fast if that works, lol
I respect the man and the channel.
Well done Sir.
Hey man ... do a SECOND round of experiments with this, where you use TWO leaf blowers blowing in opposite directions, and place a large sail in front of only ONE leaf blower. THEN you'll be legitimately propelled by sail power, but I suspect that you might have to have a really powerful leaf blower or multiple leaf blowers forward and multiple backward.
What you might find really fascinating is that with neutrino and/or sub-neutrino emitters we should be able to do this exact same experiment with a starship and be simulating gravity for propulsion. Gravity is, after all, nothing more than asymmetrical permeative particle fields ... dramatically stronger downward permeative particles fields around celestial objects. And while the neutrino/sub-neutrino emitters might have to be EXTREMELY high-power ... this really might suffice for interstellar propulsion. All we need is a free-energy device to power the emitters and we're as good as escaped from Sol.
The Law Of Physics is this: Continuous immersion in approximately isometric permeative particle fields automatically causes a gravitational effect. [12-13-2020]
Those are basic physics, but your videos are entertaining. Its pretty funny to actually see someone trying this😂
You should have used some type of curved surface to have the air travel in a reverse direction (if that makes sense). I thought that because the sail you used is flat, all that energy got wasted because the air was traveling no where. Shifting all the air into one direction would push you forward, backward, or any direction you'd like. My reasoning is horrible and I don't know too much about this but that is what I was thinking...
someone please clarify what I am trying to say please 😭
Inner force, pseudoforces, google it...(its not what you said..)
Yes, that's how reverse thrusters work. You are redirecting the direction of the air flow. If you can redirect all of the air to flow 180 degrees, it's essentially pointing the leaf blower backwards. Equal and opposite reaction will do the rest. There are energy loses due to friction, but that's not the point here.
Neighbors all watching out the window, "what is he doing now?"
Good content bro! Keep up!
Lol at first I thought the title was "Is it possible to blow your own mind" lol 😂 🤣
Edit: Omg I actually thought he said snail until I watched the vid lollllll 🤣 😂
Notice: i watched it day after I commented cuz I had to sleep and there wasn't enough time to watch.
You got to have a couple ribs removed
"Is it possible to blow your own job?"
And i thought "is it possible to blow your own _deck_ "
My old neighbor did it, wasn't pretty
@@HK-sw3vi A friend of mine did that too!
I think if you bend the glass plate like an umbrella,so that the force of air only direct on one direction instead of making it flat as in this case(flat glass is making the air scattered in every direction)...
I guess then it should work..i don't know..you tell me....
No, because you'd still have to overcome the force of the fan.
@@caodesignworks2407 The how do you explain jet reverse thrusters? Magic?
@@OmegaF77 yes
@CAO designworks but then also what about how if you hold your umbrella in the direction of the wind during a storm its gonna pull like crazy, thats basically what the leaf blower simulates
@@billgeannaris8919 The wind isn't attached to you, so the force wouldn't be pushing against at the same time.
The only way this would work to a measured degree is of the umbrella could direct the entire flow of air backward making a retro reflector. Err, retro engine? I forget what it is called. It basically redirects the air behind it. Kinda useless on such a small scale with those weights though. Which is why this guy is using an electric skate board
imagine taking a jog outside your house then seeing a guy just vibin like that
The action is strong with this one. 🧙♂️
*Random Fact* :
You are more likely to be killed by a champagne cork than by a poisonous spider !!
Not you though, I dumped a whole bucketload of spiders i n your house. 8-D
@@user-ellievator rip him i guess
Individual odds may vary.
Unless you work in the poisonous spider enclosure at the zoo.
You're right as spiders are not poisonous. They're venomous 8)
Jet reverse be like "Am I a joke to you?"
“Dad whats that sound?”
“Thats our neighbour doing weird stuff again”
why did i get an ad of a man stepping on a lego and spilling tea everywhere
me: I wanna ship.
mom: We have one at home
one at home: 3:59
My _cartoon_ childhood was a lie when I saw, I think, Daffy blowing his own sail. Later, I propagated the lie when, showing my children _Veggie Tales_ , Larry was blowing his own sail away from Bob ... :(
Thanks, mean ol' Action Lab! :D :D :D
It is possible. Watch other videos on this topic. Mythbusters is a good starting point. It confused them at first too
Somehow I feel smarter after watching this video. Thumbs up Action Lab.
I guess people could make a living redoing all the myth buster experiments.
Well ...
Forces involved in this experiment : never gonna give you up.
Not a rick roll : ua-cam.com/video/clwgJ_T2cdQ/v-deo.html
@@rheo2342 there's no video of it so it technically isn't a rickroll
@@_abk_3251 That’s what right! I am truth full. ( I do not even lie in among us )
@@_abk_3251 ua-cam.com/video/rq-G6XwwgDs/v-deo.html oh so you are a hacker?
Imagine what neighbours are thinking while these episodes are being filmed. "That damn lunatic is doing it again. We gotta sell this house."
Thank you!!!! Omg ive been pondering this since I was a kid watching the old road runner cartoons lol I knew it wouldnt work
Please also try it holding the sail in your hand without fixating it to the vehicle itself, because then I think it will bounce off the sail and be able to move, just like a rocket thrusts against the earth surface and move upwards, this is also an interesting aspect of it to think about, I think. Stupendous video as always. ☺
His hand would still be attached to his body, and his body is attached to the blower and the vehicle. The result would still be the same. A rocket isn’t attached to the ground.
Ahem he had an umbrella which propelled him more the curve acts as a redireter for the wind causing it to move more
Yea but the wind is still hitting it
he had an electric skateboard underneath the mop jawn... that’s actually why it worked
Let me guess...
1:38 is how your grandparents went to school when they were young, right?!
YOU DIDN'T SETTLE MY CURIOSITYYYY! THERE ARE STILL SO MANY FRIKKIN QUESTIONS!!! And this is something that I've been thinking for a long timeeee
Some fool doing some shenanigans outside during pandemic.
Him: *epic cinematic background music.
Today UA-cam popped up:
"Is it possible to blow your own..."
The Action Lab.
Oh right, duh, "the action lab". This is educational.
Actually you can, with enough thrust. I think Mythbusters did it. Its absurdly inefficient of course.
They did, I think it was on water. So less friction.
Remember that every action has an equal and opposite reaction. So if you have a jet fan pushing against the sail, while the jetfan is on the boat, there is also a jetfan of force wanting to push it in the opposite direction therefore making the net force 0 and it stays stationary.
Hope this Helps!
-Austin
Let's say the umbrella is md-80's nozzle..
@@jrekur If he blows into the one side of the umbrella, its possible the airflow is redirecting. Sails don't normally work totally facing the wind either.
@@TheAustinHewlettOfficial Technically speaking it CAN indeed be done. True its beyond stupid inefficient but, with enough thrust the force vectors won't exactly cancel, they can scatter enough as to become unbalanced. & thats even regardless of the shape of the sail. Such conditions could of course probably occur more easily with cone shapes. Real world physics typically aren't so Ideal. & engineering is often about assuring things become as Ideal as practical. Even in this situation the net force was most likely not exactly ZERO, Just not nearly enough to get going.
When a jet airplane lands it deploys a deflector in the jet stream to reverse thrust. Similarly a jet drive on a boat or jetski deflects the power stream with a cupped shield to achieve reverse thrust. Would that not more resemble an umbrella than a flat, "sail"?
....After I made this comment I looked up the janitors rig and agree. Wheels are different when bucket is empty vs in motion and motion is too fast to be reverse thrust on that scale. Proof in concept how ever, although I have not tested this; I believe your kart would propel forward with an umbrella shape sail although not efficiently. I am a subscriber and a big fan of your work and methods of illustration.
thats gotta be the best scientist i ve ever saw hahah
peace be upon u
They tested this on Mythbusters (I am currently rewatching it), and they found that they could get it to work with a powerful enough fan. I was hard to control and they would have been faster with the fan facing the other direction, but it did move.
Im disappointed that you dont see the issue with your video. The curvature allows the wind to blow behind where the straight sail only lets the wind blow to the sides. Please figure out where your math went wrong here before posting a new video from all the negative comments.
Also try and figure out what angle gives it the best speed.
Inner forces, pseudoforces, google it...
I have been watching your channel for about a year and it led me to take AP Physics. Now I think I already know a lot about physics and I am really excelling in that class.
You look like The Master & Commander sailing on that board 🎩🕵🏻⛵️
Everyone is first,but until then when they refresh the comments🤣🤣
How to do that
@@brohith1722 u slide up like
Up 👆
3:58
"That's the best pirate I've ever seen."
*Pirate of the Carribbean theme intensifies*
I figured it out ... good job 👍🏻
You are crushing dreams with this video, I hope you are happy with yourself
Some reason my brain likes to see this title at a glance as: “Is it possible to blow yourself?” Which we all know is a resounding “yes but only with a week or two of intense yoga”
Myth not busted, come on that's a poor effort. The umbrella doesn't block the air, it redirects it into a funnel that blows air backwards around him. Think of it like if you attached two tubes to your leaf blower and pointed them behind you by bending them around while pointing the leaf blower forward - he's doing that.
I tried the exact set up and yeah you keep the umbrella tilted up so the air hits the ground, I got up to 88 mph on the highway and got stopped by the highway state police and they gave me a ticket for being awesome, now I’m a felon.
Pirate Brownbeard! I like the sound of it!😋👌🏼
Most interesting channel.. keep it up bro. 😁
Alright @Action Lab, this has probably already been mentioned but I'll say it anyway. The madlad in that video used an umbrella, not a flat sail or board. What happens in your case with the motorized sail contraption is the force vector of the wind created by the prop/leaf blower is redirected to the sides, producing two equal (or not) component forces perpendicular to the main flow of air. With that said, the air from the leaf blower in that video was directed towards the center, turned around due to the half spherical, somewhat parabolical shape of the umbrella, and deflected in the reverse direction, thus producing rearward thrust. So just like @Black70Fastback mentioned, the concept is very similar to the thrust reversers of an airplane, not the sails of a ship. Hope that makes the slightest bit of sense.
Oh, a believer!
Man: You can clearly see a skaboard under the bucket. No, those are not the bucket wheels. No, the umbrella will create a lot of turbulence, it's better to just use the leaf blower alone, and even better to just ride the electric skate board.
@@Ktulu789 What, lol? 😂
@@contagiousingenuityagency5273 I thought you spoke English 😅
Sorry, my bad.
@@Ktulu789 I thought you spoke it too - talking to the wrong person then, I guess... 🤦
I must have been living under a rock all these years to not know what a skaboard is. 😂
I'm second, because everyone else is first. 🤣🤣
My neighbors are like, "look, it's the 'adult' who plays films myself playing with Lego.
I can see that the neighbours won't ever have a boring day in the neighbourhood with you as the mad scientist.
but your sail aint a sail. it must be secured at the sides. when your sail moves to the sides, so does the air.
His sail is a studio light reflector. LOL!
So you think it would work if he had an actual sail? Lol
@@notlewisz3713 ua-cam.com/video/n9cdfUYkrLY/v-deo.html
No. Newton's third law. Action/Reaction.
That's what I thought
But then concave boi go brrrrrr
Amazing how much you cover and still manage to put out interesting content. Love what your doing mate keep it up 🙂
That's got to be the best pirate I have ever seen.
Fastest first comment of my life
What??
let's get his first comment ever to 300 likes or more
Wait but when i click your channel it said you commented 2 times already on this channel.
lets go chimp...
@@wiz-healedbykfp624 first one to comment/comment befor nobody comment on a video. not first comment
First off the sail you used is to big for the amount if air you were blowing on it, that's why the janitor used an umbrella and it works
Jikes I've been fooled, thanks for not letting that bs go further deep into my mind.
4:06 that has got to be the best pirate ive ever seen...
Hi, this has got to do with the shape of the sail. Since a flat sail was used here, the air just distributed laterally to the direction of the mini car. I'm saying this because I've done this thing when I was a kid. The difference was that I used a sail made of plastic sheet that had a lot of curvature, sort of like the umbrella. I did it on a boat and it moved forward. The moment I removed the sail, the boat started moving in the opposite direction.
So, I will suggest you try the same thing with an umbrella and a trolley with low friction wheels. It might really work.
This person is the full body manifestation of " I don't need sleep I need answers"
I’ve explained this to a friend a few times! I immediately debunked the video and he was unhappy. The best comparison I could think of was putting a parachute behind an air-boat... 🤷🏻♂️
As a kid I saw a Looney Toons skit where Coyote used a propeller engine in a bathtub to move, and since then I have always had it in my head of "Would that work?" Now I know, after years, it would not XD
Finally my childhood questions answered
A crucial difference between your experimental setup and the video clip you showed is that he was "tacking" with the umbrella: it was not directly in front of him, but off directly forward by some angle. To faithfully reproduce his set up, you should (if you haven't already) try positioning the "sail" off the direction of travel.
Yeah it definitely works. It depends on the circumference and depth of the sail. Turning the sail, with maneuverable wheels and arming bars for parallelism, the sail should work with the leaf blower. Whether if the leaf blower was 5 feet from the sail or 15ft. Sometimes making a directory box for the airflow actually carries quite impact on ratios. This in deed works. Because the sails do work if worked properly. Like putting a slim sail on a rip stick. That's something that seems impossible but imagine your body becomes the sail, having something flat in front of you is just applying forces against the motion in which the frame can only be directed.
The video about the guy with the umbrella just got in my recommended and I immediately searched for this video.
03:56 That's exactly how Jack Sparrow started his career as pirate
Alternative title "Madman makes self-propelled sail on ground"
the question which was stuck inside my head since childhood
I am also not saying the video is true, but... Sail on the boat is not flat and move it mainly not because wind pushes the boat but because under/over pressure is created around the sail. That's why boat can move almost against the wind. Try it with curved sail and let see then. Good work and nice videos. Thanks.
3:58 - That's got to be the best pirate I've ever seen
4:03 Thats got to be the best pirate I've ever seen.
That's gotta be the best pirate i've ever seen
Great work.