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'Underwater bicycle' propels swimmers forward at superhuman speed

newatlas.com

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Re: 'Underwater bicycle' propels swimmers forward at superhuman speed

#111
post #104
post #93

Earlier quoted context omitted.

Interesting that the CIA conclusion for a device very similar to the article is "Not recommended for operational use due to its discomfort and very slight gain in speed over that of a swimmer equipped with fins."

Yeah I think for most uses I would still prefer fins for their agility. Cool idea though, and we probably haven't seen peak efficiency here.

Peak efficiency probably looks like this:

https://newatlas.com/marine/jetcycle-hydrofoil-pedal-bike/

Re: 'Underwater bicycle' propels swimmers forward at superhuman speed

#112
post #51

I swim because I enjoy it, not because I'm trying to get somewhere fast. This seems awkward and I bet you have to use your arms just to counterbalance the twist you'd get on each 'stroke' of the leg. So even though I think it's goofy, I bet I'd like whoever came up with this. Someone who put a ton of effort into building something they thought would be interesting despite a thousand people telling them it's goofy. Go…

> I swim because I enjoy it, not because I'm trying to get somewhere fast. I run because I enjoy it, not because I’m trying to get somewhere fast. But I also bike because I enjoy it, not because I’m trying to get somewhere fast. You seem to assume that because this thing is faster, it must automatically be less enjoyable. That’s not the case for bikes, why should it be the case here? In my opinion it sounds fun, and…

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Re: 'Underwater bicycle' propels swimmers forward at superhuman speed

#113
post #16

Earlier quoted context omitted.

Anything you choose will be cumbersome because you can't create friction on the water (well...), your ability to move is based on your ability to move water around you. There are solutions that leverage a pair of catamarans and a track system, or a prop. These tend to move very slowly, much slower than a canoe or kayak. The water wheel style systems seem to move faster, but you can just get a pedal kayak and will be…

I've always wondered why nobody has created something that looks like a catamaran with two rowing shells and a road bike on top directly connected to a prop. That would have minimal drag, an optimal body positioning for using leg muscle strength, and would be fun and intuitive to pilot (facing forwards, feels like biking, etc). The obvious downside is that height above water may be an issue so the catamaran would hav…

I believe an ocean crossing was even done with this kind of vehicle.

Re: 'Underwater bicycle' propels swimmers forward at superhuman speed

#114
post #10

I wish we could find a good way to bike over the surface of the water. I haven’t seen anything that’s not slow and cumbersome.

Hydrofoil bike: https://manta5.com/ https://www.youtube.com/watch?v=heSPbLHftKw

That's battery powered though, and looks pretty heavy. I think I'd sooner go for one of these https://liftfoils.com/

Re: 'Underwater bicycle' propels swimmers forward at superhuman speed

#116

If it’s powered exclusively by a human then whatever the results, they’re not “superhuman”.

Super == above, over, beyond. If it augments the human's capabilities, it's definitely super!

Super, sure, superhuman, no… someone running in shoes isn’t superhuman compared to someone in bare feet, anymore than someone using a block and tackle to lift or a wheelbarrow to transport is engaging in superhuman acts just because they’ve used their very human brain to leverage a simple machine.

Something like this expands the envelope of what is, definitionally, the realm of natural human capacity… it pushes what qualifies as superhuman further away, but it doesn’t mean you’ve done something superhuman.

Re: 'Underwater bicycle' propels swimmers forward at superhuman speed

#118
post #115

From the looks of the scuba diving video, it looks worse. There's way more leg movement and it looks less controlled (and more likely to damage corals/kick up sand from the bottom) than slow finning.

I'm inclined to agree with you.

That said this certainly has its place. There are lots of use cases for wanting to swim more quickly through the water, where precise control is less important and where you aren't right next to fragile life.

Re: 'Underwater bicycle' propels swimmers forward at superhuman speed

#119
post #85

If it’s powered exclusively by a human then whatever the results, they’re not “superhuman”.

with my bike I can easily outrun any 100m dasher on the earth.

Sure… and, notwithstanding the apples to oranges comparison — since I can outswim or out stair climb you when you’re on a bike any day of the week — that means you’re demonstrating how fast a human can turn a crank that a human has connected to a wheel that a human has realized will transfer traction into forward momentum; nothing remotely superhuman has occurred, your maximum speed with that implement is still entirely limited by your very normal human capabilities.
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