Jumping robot leaps to record heights 

I'm glad someone else noticed, they have intermeshing leg notches that synchronize their legs when they jump, also pistol shrimp cock their claws back with a ratchet-like mechanism, lots of examples.

Also literally the grasshoppers the video described use a kind of spring mechanism

@@MrAlziepen yes and trap jaw ants have a similar mechanism for aligning their jaws as well.

Those geared mechanisms don't use gear ratios to multiply power though, they only synchronize the legs

I mean mantis shrimp have a naturally occurring single tooth ratcheting mechanism which is why the have the ability to punch so hard and with such force

Probably talking about the use of gears in order to get very large trade-offs between force and distance, allowing for creating more tension than would otherwise be possible? Basically, nature almost never makes gears. (Though iirc there might be few cases of gear-ish things in nature?)

@@drdca8263 I think the topic is the following: Similar to an animal, the robot can jump multiple times using an onboard motor. The motor has limited power output, but for a jump you need a lot of power released in a blink of an eye. So the robot has a wind up mechanism and stores the energy using rubber bands, increasing the power output for a short time frame after release. Crickets do something similar with their legs and muscles.

@@jojojo9240 sure, but crickets do this in a lever-y way, while this does it in a gear-using way, which allows doing it much more (without needing a very very long lever)

@@drdca8263 I might wanna look into how crickets do it more, do you know some source you can give me?

@@drdca8263 mantis shrimp is also crazy

At University the contest was who could throw an egg the longest distance without it breaking. So, you had to design a 'crack' landing device (judged on weight( and throwing machine judged on distance. You had a maximum spend of $100, and you couldn't buy a completed off the shelf item. The winner used a very dangerous looking home made slingshot. I can't remember about the landing material

@@wakelamp Highest farthest fastest ...

sounds easy, low angle powerful slingshot to shoot a spherical holder so there isnt much energy transfer upon landing, just centrifugal force. Faster it spins the better. There, I win.

Probably the motor with the spinning axle is what he was referring to

@@diggoran That is also what Matthias was referring to. There are mechanisms that use muscles as motors to store up energy to be released, like the grasshopper with the elastic rods.

And that shrimp thing if i remember right, the one using gears

@@serbanandrei7532 mantis shrimp. Good call

@@CliffSherlock also the pistol shrimp and chameleon tongue

modify it to eject projectiles, like arrows or something

Yes definitely

@@fitrianhidayat So, make a Bow?

Ok that's a cool image

Wow, that was really cool

Maybe for Mars?

Same problem NASA has. You add more energy (legs) but at the same time you add more mass that has to be accalerated. This jumper is close to the optimal mass energy ratio for best accelaration. To improve it you have to store more energy without adding more mass, what can only be done be new (jet unknown) materials.

im pretty sure Ben Dova wrote that book

psychopath

@@parallellink it's only business, don't be mad.

You could probably build a refined version of this that can alter it's trajectory, take high quality pictures and minor sensor readings, and have the ability to charge itself, and you could release swarms of them with an unsophisticated AI coordination program that has to move away from other jumpers, to cover as much land as possible. The nice thing about this design is aside from the control mechanisms, the winch that puts the legs in tension can be made in a bunch of different novel ways to where it would consume almost no power. I would say a set of microservos with filaments to slightly adjust the tension or release on some of the legs work give you a decent way to control direction. You could use all kind of weird rotation and release mechanisms like thermal actuators.

Read the paper

@@williamchamberlain2263 You want me to spend $32 to download a paper, and furthermore, you want me to believe that inside the paper there will be a zoomed out video of this robot jumping? Why isn't that video... in this video? Why would it be in a paper?

@@diggoran you deserve a 3 story house for pointing that out

Literally at the beginning of the video?

About 30 meters, thank me later

There are indeed biological ratcheting mechanisms, and they're used in jumping

Not a robot

To pad-out the video's length.

Anger, fear, elastic bands ... these are the paths to the dark side.

This is only 24 joules. Let's say we use a carbon fiber leaf spring, it extends at 55 mph with 1700 pounds of strength. Use gears to covert that to 440 mph with 212.5 pounds of strength moving long bent legs to increase the contact time and reduce Gforce inefficiency. I'd say that both breaks the record here and makes for good scalable murder muscles for a terminator. It could punch through you like a bullet and change gears so that it can carry a car while using normal collections of motors to power slower precision movements. Become rich and make this immediately.

Cope

@@williamchamberlain2263 Educate yourself.

It would be difficult to capture useable footage of it through the whole trajectory. If you frame in 35 meters, the device will be hard to resolve. If you try to follow it, the footage will be blurred and jerky. It seems likely they have more video than we have seen. They might have single shot coverage, but feel it was not great in a RU-vid video.

I'd say not even 50-50. If it lands flat then it's on its side. Then it reels in, toward a ball-shape (initially approx. 90deg out of alignment)....CoG takes over, looks to be heavy "on top" when in correct position. So the second time around it'll roll in the wrong direction and fail to align for #2.

@@gordonthomson7533 The clip at 2:10 seems to show it self correcting. I wonder how it would work on an uneven sandy/rocky surface, though.

Yes, but these improvements would make it heavier, so the maximum height would be a lot lower.

@@willempaternotte4071 I don’t think it would be that much heavier, as all you would need to recapture the impact would be a ratchet, and the wings could just be very lightweight foam.

@@macrumpton well, if the wings stuck out at all, then their gonna break or deform into uselessness on landing... but the ratchets a great idea.

@@BeauZoe I actually did some preliminary work on a device like this about a decade ago, and my idea was that the wings/fins would act to steer the device to come down at a good angle for “recharging “. The way this would happen is the fins/wings would move from the middle of the device (when flying) then move to the back of the device when diving for guidance like an arrow. On impact the fins would flip to the other end to stabilize/steer (like an arrow) the device in its upward trajectory. If you’re really curious, send me a message and I will send you a sketch.

@@macrumpton that's true, but even light foam could be considered heavy for such a light vehicle, you could use expensive materials like aerogel, but that's very brittle, i don't know if it'd survive the landing. It would also be heavy, because you would want some kind of steering mechanism and they should probably be able to fold in and out, for a aerodynamic launch. This all would add weight. Although the folding in and out could just work like a parachute, the wings would catch a little air and lift themselves up, steering seems difficult to make aero and light.

Build it, show me

For one, they're not using rubber band, they're using the extreme tension being built up in the material as it bends. Second, an explosive charge immediately stops delivering its maximum potential impact the instant there's no longer a seal in place, while this thing doesn't seem to leave the ground proper until it's almost fully extended. And third, making something like this durable enough to handle an explosive charge would likely mean it'd have to be significantly heavier. Plus, at least in theory, this can launch itself multiple times in the right circumstances. Using an explosive charge would eliminate that potential benefit.

Apparently (based on another comment I saw) there is MATLAB code available, so, it seems likely that yes? But not sure

That's one of their main kinks.

You butchered the quote, ma dude

125 meters, according to the video.

125 meters, 410 feet

I guess you didn’t listen to the video, then.

It was slipped in the last few seconds, he could have been distracted. And thank you for the conversion to feet, it's late here, too late for math, not up to doing it myself. It's a fascinating device, I'm curious what payload it can carry. And of course, how much bigger will they get?