Highest Boat Launch Ever!

Watch our boat fly haha

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[humantheguy]

My first commtest submission as a physics student!!

The water has an insane amount of kinetic (moving) energy as it reaches the blob. As it hits the inflated side of the blob, it transfers its kinetic energy into potential energy. This potential energy travels across the blob from the inflated to the deflated side, and the object on the deflated side is propelled upward with equal energy to the bag of water as it fell, quickly turning back into kinetic energy.

Now, this is only in an ideal world. Due to the laws of thermodynamics, energy is lost during the transfer to friction, sound, etc.

Therefore, the ideal length of the blob is probably even shorter than the one used for the boat, I would say roughly twice the width of the bag of water. If you look at the “slowie” at the end of the video, you can see the bit of inflated blob between the water and the boat. In that distance between the falling water and the object, a small amount of energy is being lost.
That being said, if the object is too close, or the blob too short (less than half the water bag’s width), then the water bag will either hit the object or the blob will not have enough space inside to re-inflate the other half of it, immediately compromising the spring force of the blob that makes watermelons fly to outer space.

Hope that sounds smart enough :)

[aaroncameron]

So the blob works on something called impeadance matching. In this case it has to do with how effectively the mechanical shock of the water bucket can be transfered to the air inside the blob. Then the compression wave of the air has to match up with the fabric on the other side to launch the items. The interface from impact to air to launch is an impeadance matching problem. The best way to find out the proper impeadance matched air fill is 3d modeling. This modeling is like what Mark Rober did for the trampoline.

[MarkWallaceVideos]

Hey! Thanks for the shout-out to all of us Marks!

[QuitoQueso]

Y'all need to launch a piano. I can't wait to hear what it sounds like when it hits the ground.

[rbgilbert]

Need to get Mark Rober to design ya'll a high energy, high velocity capable blob. Since those are technically designed for humans. Need like a kevlar ultra tough stitching Super Blob. Challenge initiated!

[meeksian]

That boat flip was insane! The bag acts as a see-saw, a weight pushes one side down forcing the other side up. The main difference is the air. The smaller bag should send items higher as there's less space for the forced air to travel to making it more efficient, though there's more of a risk of it popping. Using the principle of conservation of energy you can roughly predict how high the object will go, though you can't predict how cool it will look in slo-mo!

Also, would it be ridiculous to play noughts and crossed with the blob, basketball or javelin style?

[raymarshall]

I have to say, I stumbled across HR a few years back, and I have been here since. No matter how long or bad of a day it has been, these videos get me back into a good mood, laughing and having a good time! Thank you guys!

[BlissBatch]

The Statue of Liberty is 305 feet tall, _including the massive base._ These absolute madlads launched a rubber ball 40 feet higher.

[laurahenderson]

Was it higher than the trampoline launch? Looked incredible boys! Thank you so much as always you bring such joy!

[waynasfamilyadventures]

In sted of sitting object on top, push the end inside itself and put objects in the pocket. They will shoot out like a cannon

[phasm]

Crane operator: "this is the weirdest jobsite I've been on." 😅

[wyattloehr]

I happen to go to the camp where the blob was invented, so here’s a little story about it’s creation!

The camp’s founder, Tex Robertson, needed a temporary roof for the archery shack, but didn’t have much of a budget, so he bought a tarp container from the government’s war surplus. I’m not sure, but I think it used to store gasoline. Anyways, to move the blob over to the archery shack, he pumped it up with air so he could pull it. While he was pulling it, his friend (I forgot his name, but I think it was Patrick) jumped on it and found the bouncing it did was pretty fun! They started experimenting with the blob, and found that it worked best on a lake, so they put it on the lake and made a little diving platform to jump onto it, and later put a “sock” over the black rubber blob, since it got very hot in summer. Some changes have been made over the years, but it’s remained about the same since it’s beginning.

[JevinJohnson-CloudShift]

The smaller blob can hold less air in it than the big blob. However, the size of the water bag is the same. What this means is that, proportionally, the small blob can move more air over to the other side of the blob quicker and harder. This also means that the water bag cannot push out all of the air underneath it without fully inflating the other end. This gives the smaller blob a much more forceful launch; however, it also causes the small blob to burst pretty much every time.

As for the Big Blob, you can see in the slo-mos (2:14, 4:40 and 12:42) that the water compresses the blob, then the air has to travel across the length, which allows energy to dissipate before it reaches the projectile. The larger volume also allows for the air to adjust and compress to the sudden 1, 000 kg of force. Overall, this happens in a fraction of a second and does not dissipate a lot of energy, but the compressibility of air allows it to absorb the impact like a spring. This heats up the air, which is a loss of energy. Again, this loss in energy is very small, which is why the Big Blob still performs spectacularly.

Edit: TL:DR More air can absorb more energy, so smol blob is better. The air absorbs a small amount of energy, so the difference is small.

[Marktol]

I MARK my territory as a Mark. Never felt so much attention from a YouTube video before. I feel so wanted. Good job guys. Love your content.

[mehbiss]

Finally some recognition for us Marks!

[TheNoteblockLizard]

Hmmm ... I'd love to see a washing machine, a dish washer and a fridge each launched with the Blob :D

[TheLivingBlobfish]

"Why would anyone else... do this?"
That pretty much sums up HR right there.

[Marchelthegreat]

The blob is full of something, and things when dropped on it make other things go high. - My only form of education is Science with Gaunson

[JontysCorner]

I feel like I have to suggest this:
Can you Line-X the blob and launch a car with a van? 🤔

[BurkesBucknFirewood]

Destroy things with the HAMMER! BEST videos yet