Kick starters and flywheel technology

[russ]

If one ever comes apart (and any device rotating at high speed can) it would make a mess of the family and neighborhood.

[Alisobob]

Just what I want, sitting in my side yard.

[russ]

If Velkess has found the holy grail of energy storage you would have very big investors running for the chance to be part of a revolutionary technology. Even someone like Bill Gates who has invested in a number of RE technology system hasn't given 1 penny to Velkess.

Right - the VC bunch would be all over it. They would also bring name to the venture - this is a bunch of clowns.

[Alisobob]

The speed of sound is about 340 meters/sec.

So it has something in common with the jet: both are supersonic

The speed of sound in a vacuum , where this thing is supposed to operate.... is... zero.

Again, more cliche's , no facts.

[russ]

So buy them - they are constantly looking for suckers that believe the BS line they are spreading.

[SunEagle]

The Velkess prototype demonstrated an efficiency that was a little greater than 80%. I said "demonstrated" Russ. The design is proven and pre-production units have been built. The only thing that remains is whether these devices can be profitably mass produced at the given price point.

I agree that the Velkess flywheel technology is a cut above some of the older types and may actually find a place (at a cost) to be an effective energy storage unit.

I still don't like the idea of asking for funds through "kick start" which IMO is for people trying to build something that has limited market share.

If Velkess has found the holy grail of energy storage you would have very big investors running for the chance to be part of a revolutionary technology. Even someone like Bill Gates who has invested in a number of RE technology system hasn't given 1 penny to Velkess.

[SunEagle]

"So it has something in common with the jet: both are supersonic"

uh, what is the speed of sound in a vacuum ?

If a tree falls in the woods and .... never mind.

[kwilcox]

...A battery has a power efficiency of roughly 80%. When fully charged it requires almost no power to stay charged up. Flywheel efficiency is single digits. At very best is if you spool up a Flywheel, and then immediately dump the energy efficiency is roughly 50 to 60% due to 3 energy conversions . Want to use that energy a few hours later and efficiency is single digits.

The Velkess prototype demonstrated an efficiency that was a little greater than 80%. I said "demonstrated" Russ. The design is proven and pre-production units have been built. The only thing that remains is whether these devices can be profitably mass produced at the given price point.

[kwilcox]

...An efficient flywheel design with a limited size concentrates the mass at the rim to the extent that it can be done without compromising structural integrity.

That's how mass is distributed in the velkess flywheel design too. Kevlar rope forms a flexible spinning loop which is where most of the 40" cube's 750 lb weight lies.

[russ]

No. That is the difference between linear and angular momentum and the corresponding kinetic energy for translational and rotational motion.

Double the mass in either and you double the energy.
Double the speed (linear or angular) in either of them and you quadruple the energy.
But double the radius of the flywheel, keeping the total mass the same and you also quadruple the energy for the same angular velocity (i.e. RPM).
An efficient flywheel design with a limited size concentrates the mass at the rim to the extent that it can be done without compromising structural integrity.

Oh gee!

[Mike90250]

Was my last post inaccurate?

"So it has something in common with the jet: both are supersonic"

uh, what is the speed of sound in a vacuum ?

[inetdog]

amount of rotating mass - or weight in simple terms

No. That is the difference between linear and angular momentum and the corresponding kinetic energy for translational and rotational motion.

Double the mass in either and you double the energy.
Double the speed (linear or angular) in either of them and you quadruple the energy.
But double the radius of the flywheel, keeping the total mass the same and you also quadruple the energy for the same angular velocity (i.e. RPM).
An efficient flywheel design with a limited size concentrates the mass at the rim to the extent that it can be done without compromising structural integrity.

[russ]

No!
Diameter counts too (actually the details of weight distribution from axle to circumference.)

amount of rotating mass - or weight in simple terms

[inetdog]

Your last post and all posts on the flywheel are like a teenager it seems.

The only two things that count wit a flywheel are rpm and weight.

No!
Diameter counts too (actually the details of weight distribution from axle to circumference.)

[russ]

Your last post and all posts on the flywheel are like a teenager it seems.

The only two things that count wit a flywheel are rpm and weight.