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Damn it all do your research its INERTIA, not weight…the weight remains the same unless you acclerate the object…What in effect this piece of fluff is a gryo, and a tiny whimpy one at that….here read a bit before you render.
http://en.wikipedia.org/wiki/Inertia

Is it worth mentioning that the law of conservation of mass makes this impossible? No? Ok. The only way to “generate” weight would be to increase the pull of gravity on a mass. I don’t think these dumbbells do that. Spinning up a mass will certainly generate rotational inertia, but that won’t increase resistance for weightlifting movements.

I guess this is why engineers shouldn’t read design blogs.

theirs a gyro thing called a powerball that has the same concept they are quite addictive.

Is this supposed to be some sort of gyroscopic exercise tool? As the previous comment correctly states: you cant generate mass with this, but can generate momentum.
As the owner of a powerball myself, im not sure how this would be a joy to use when there are two at the end of the handle, while you try to keep it under control.

It will also be an engineering marvel to keep both of the gyroscopes within phase of each other.

As an engineer and designer, I can say that while cool looking, this is totally physically impossible.

I been following YD for the last 2-3 years ever since it started and it’s interesting how the site has grown and attracts a large demographic of people. We got engineers visiting a design site and giving their expertise! This is very useful information for me.

it doesn’t make any sense. If you’ve already known that something is impossible and even against existing physical rules, is your dessign still a design? I think it is just bullshit.

Hmm. I agree that you arent able to “add weight” this way. But I like the idea of a digitally controlled and motorized “powerball-like” device. As previous commenters mentioned the powerball creates a gyroscopic effect which offers resistance to motion. I think it helps with tennis elbow? also it is pretty cool to feel. And it is infact an exercise tool. If you move your arm or wave your hand you do feel resistance and are in fact excercizing, but you have to be rotating it, not just using it as a dumbbell.
see a quote from powerball.com
“NSD Powerball generates between 1 - 40lbs of resistance depending on rotor speed ..”

So I suggest the designer drops the dumbell weight lifting idea, keep the shape and style, and keep the motor. but I dont think you need little ball bearings. A spinning weight does just fine. If you had two seperately controlled spinning masses at each end and they were not matching speed you would have a weird effect which may or may not be comfortable. But you can always just lock the two spinning weights so that they are spun by one motor at the same speed.

and to prove the point that it does “add weight”, if you hold a power drill in your hand, does it feel heavier when to press the trigger? no, you just feel a quick jerk due to the inertia of the spinning mass.

As usual I like fantastical designs, even if they dont work in the real world. I would still like to see this turned into some product even if its just a digitally contolled cylindrical powerball.

Wow can you believe this “Engineers” are using the word IMP*SSIBLE and C*N’T, a real Engineer should not use those words…they are limiting. I agree with prodmod “As usual I like fantastical designs, even if they dont work in the real world. I would still like to see this turned into some product even if its just a digitally contolled cylindrical powerball.”

Free your mind.

ps..respect to my Engineer brothers

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@Greg
Don’t be a moron

Also, don’t tell me that I CAN’T telepathically control objects. I don’t want you to say that’s it’s IMPOSSIBLE. Because, obviously, if I dream hard enough, I will eventually be able to move things with my mind.

Greg, I think you might be confusing engineering with magic. Completely understandable since you are obviously a halfwit.

Wow… this is stupid

Emphasize the “Dumb” in dumbbells in this case.

I studied industrial design, and I also studied engineering. Why do designers think they can whip any product into a “design” by making it 1) digital, and 2) unnecessarily complicated? (in this case, by invoking non-existent or wrong science?) That is not the point of design. Any fool can say “poof! It’s digital!”. Any infomercial will show you how to make something unnecessarily complicated.

I’m shocked this designer’s instructors didn’t call him out on this. Shame on them.

even if it does increase the mass (which i don’t see how that can happen), it isn’t practical.. this is just a simple design which is only useful for a very limited work out..

the design does look cool, but that is all there is to it…

I’M AN ENGINEER AND I CAN TELL YOU THAT THIS IS TOTALLY IMPOSSIBLE!!!

Ironically I did ask many people about this concept, and they (all non-engineers, just product designers) said it made sense!

What you would get with this is similar to a POWERBALL. Like a Powerball, it won’t increase in weight but create a rotational force.

This design is cool, but impossible. You guys have to remember that product designers may be artistic, but have no real intelligence.