That's like capacitor, it's better calling that device mechanical capacitor. ?

I think flywheels make a lot of sense to adress the intermittency of a renewable enercy mix, it is tried and tested over centuries unlike some odd gravitational bettry prototypes. The key IMHO is to think about energy density vs weight. In an electric car the sheer weight of a flywheel means it can't compete with a chemical battery. But for utility scale, decentralised energy storage it's perfect, isn't a problem if it is stationary.

The idle losses losses during storage is one of the biggest disadvantages of this tech, they lose energy to quickly to be used for long-term energy storage, and there is still a significant barrier that needs to be overcome before the flywheel technology can solve the task of storing renewable energy. This is why they are mostly used for short duration applications where they can operate a few minutes up to a maximum of an hour. Superconducting bearings will be a game changer as the reduction of friction losses is the main focus of research and development for flywheel systems, since it enables increased rotating speeds and decreases self-discharge rates. I hope this bit of info helps to answer your question :)

@@GeniusEngineering Thanks a lot for explanation!

You're welcome. Thank you for your comment!

@@GeniusEngineering Note that this is one side. In normal application the flywheels are constantly being powered with an efficiency of 95-98% when rotating at an equilibrium. They only spin down when the energy stored in them is actually needed.

@@GeniusEngineering it is already used a lot for grid systems and self-discharge have been already reduced a lot using magnetic levitation and vacuum to reduce all losses. I think BeaconPower said their flywheels only self-discharge for about 0.1% per month, which is more than perfect for homeowners and microgrids.

Thank you for your comment! Glad to hear it was informative.

Thank you for your comment! It means a lot

In the mid 50's there was a bus (Gyrobus) that operated on the very same principle.

@@GeniusEngineering the difference is Gyrobus was powered only by the the flywheel, recharging it on each bus stop. Just imagine having not only no air pollution, but also no electro-magnetic pollution from electricity as it required no electricity.

i read that many subway station uses that tech already

@@DreamingConcepts electromagnetic pollution isn't a real thing.

​@@mrtriathlondude ​Scientific studies says it is: pubmed.ncbi.nlm.nih.gov/27012122/ pubmed.ncbi.nlm.nih.gov/28414399/ www.ncbi.nlm.nih.gov/pmc/articles/PMC6685799/ www.ncbi.nlm.nih.gov/pmc/articles/PMC6025786/ pubmed.ncbi.nlm.nih.gov/14757715/ And these are just a few.

Magnetic bearings are subject to large demagnetization fields and break down. Electromagnets solve that problem but require energy use. Which is better? Depends on what your engineering requirements are.

I hope the video explained it good enough :)

I agree a 100% with you. Thank you so much for your comment, glad you enjoyed the video!

Glad you liked it :)

Glad you enjoyed the video!

Thank you so much for pointing it out, not sure how I looked past that. I appreciate your comment!

Thanks for you comment, it means a lot!

hybrids as well could recharge batteries or trickle charge …. could be part of braking inertia…

Size

Thanks for your answer @BI7L!

@BI7L Gravity? Sorry - I don't understand what kind of relation between rortation and gravity we are taking about?

Not in the case of my designs the axis of earth is orthogonal to the Gajjar Mechanical Battery

Earth's rotation is slow

Losses probably faster than the charge

That’s a good question, I’ll do a bit of research and maybe make a video on it. Thanks for your comment!

Thank you for your comment Steven, it means a lot!

Dankie vir die comment Carlo! Dit beteken baie.

Because bearings based only on permanent magnets can`t be stable. It is use some times complex bearings with permanents and active magnets. Then the electric consumption become less. Also can be used bearing on super conductor base, but then you will must to spend electric energy for super conductor cooling.

Thanks for the explanation!

@@Sol-En But they do exist, i assume the spin stabilizes it or diamagnetism perhaps.

@@DwAboutItManFr Yea that`s true. I think, that it is hard to do electric generator with spin stabilization, because you need quite little gap between rotor and stator for effective work. It is impossible to achive such little gap with only spin stabilization. Diamagnetic forces quite weak , so it is also difficult to do i think. Main general problem of passive sistem is no vibration supression, and as result big vibration :) So active element unfortunatly must be i suppose

​@@GeniusEngineering And thank you for video. Videos like that are very important for our civilisation, because they are enable beginner and advanced engeneers to learn faster and with more pleasure. And also for Russians like i am it`s very helpful for English learning :)

I'm not sure if there are any Flywheel batteries commercially available on the market yet.

You rock!

Yes I'm South African 😀