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The mechanical bettery
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The mechanical bettery
On 22/08/2020 17:27, harry wrote:
https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. -- Max Demian |
The mechanical bettery
On Saturday, 22 August 2020 17:27:53 UTC+1, harry wrote:
https://www.youtube.com/watch?v=_QLEERYS5C8 A single flywheel would surely equate to a cell, not a battery? (And certainly not a bettery. We have far too many gambling ads already.) The very term "mechanical battery" looks like a lame way of making a well-known, long-established and understood technology, with many good uses, sound like it is a new competitor. |
The mechanical bettery
On Sat, 22 Aug 2020 11:42:47 -0700 (PDT), polygonum_on_google
wrote: On Saturday, 22 August 2020 17:27:53 UTC+1, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 A single flywheel would surely equate to a cell, not a battery? (And certainly not a bettery. We have far too many gambling ads already.) The very term "mechanical battery" looks like a lame way of making a well-known, long-established and understood technology, with many good uses, sound like it is a new competitor. Yup, like storing energy in a 'battery' of railway trucks on a slope (ARES). Cheers, T i m |
The mechanical bettery
On 22/08/2020 19:52, Chris Hogg wrote:
On Sat, 22 Aug 2020 18:39:31 +0100, Max Demian wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. Many years ago I read an article on flywheel-powered shunting engines. I think it was in 'The Eagle' comic, circa 1955, estimated from where we were living at the time. This may have been for use in chemical plants where there could be explosive vapours. IIRC it's also been used in urban trams or buses. Not that many new ideas around apart from some of the genuine quantum stuff. |
The mechanical bettery
On 22/08/2020 17:27, harry wrote:
https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bill |
The mechanical bettery
williamwright wrote
harry wrote https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bull**** https://en.wikipedia.org/wiki/Flywheel#Physics |
The mechanical bettery
On 22/08/2020 18:39, Max Demian wrote:
On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. And clockwork springs. Brian -- Brian -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
The mechanical bettery
On 23/08/2020 02:19, williamwright wrote:
On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bill Hmmm... there's a flywheel on my car engine that is not storing any energy. Ah, it's not spinning! Maybe it's something to do with moment of inertia and angular velocity. That seemed to explain it simply when I was at school. |
The mechanical bettery
On 23/08/2020 08:55, mm0fmf wrote:
On 23/08/2020 02:19, williamwright wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bill Hmmm... there's a flywheel on my car engine that is not storing any energy. Ah, it's not spinning! Maybe it's something to do with moment of inertia and angular velocity. That seemed to explain it simply when I was at school. bloody dual mass flywheels...don't touch them...in fact don't touch a small engine in a big car and you won't need one |
The mechanical bettery
On 22/08/2020 19:42, polygonum_on_google wrote:
On Saturday, 22 August 2020 17:27:53 UTC+1, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 A single flywheel would surely equate to a cell, not a battery? (And certainly not a bettery. We have far too many gambling ads already.) The very term "mechanical battery" looks like a lame way of making a well-known, long-established and understood technology, with many good uses, sound like it is a new competitor. Exactly. Years ago on a flight in an aircraft packed with electronics, I asked what the whining under the floor was: 'rotary converter: generates all the power for the racks from the aircraft batteries' 'why not an inverter?''Ever seen what happens to the battery voltage when you raise the undercarriage?' The spinning mass of turbines and generators on the grid is the only form of short term storage it has. -- The theory of Communism may be summed up in one sentence: Abolish all private property. Karl Marx |
The mechanical bettery
On 22/08/2020 18:39, Max Demian wrote:
On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. Or maybe not... https://www.bbc.co.uk/news/uk-england-london-53877433 -- Jeff |
The mechanical bettery
On 22/08/2020 21:34, newshound wrote:
On 22/08/2020 19:52, Chris Hogg wrote: On Sat, 22 Aug 2020 18:39:31 +0100, Max Demian wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. Many years ago I read an article on flywheel-powered shunting engines. I think it was in 'The Eagle' comic, circa 1955, estimated from where we were living at the time. Flywheels have been tried as an energy storage device in modern hybrid diesel locomotives. They resulted in a reduction in fuel consumption as compared to a pure diesel, but not as much as a diesel/battery hybrid. This may have been for use in chemical plants where there could be explosive vapours. IIRC it's also been used in urban trams or buses. Not that many new ideas around apart from some of the genuine quantum stuff. Chemical plants often used fireless locomotives to avoid the explosion risk: https://en.wikipedia.org/wiki/Fireless_locomotive -- Colin Bignell |
The mechanical bettery
On Sat, 22 Aug 2020 21:34:03 +0100, newshound
wrote: On 22/08/2020 19:52, Chris Hogg wrote: On Sat, 22 Aug 2020 18:39:31 +0100, Max Demian wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. Many years ago I read an article on flywheel-powered shunting engines. I think it was in 'The Eagle' comic, circa 1955, estimated from where we were living at the time. This may have been for use in chemical plants where there could be explosive vapours. IIRC it's also been used in urban trams or buses. Not that many new ideas around apart from some of the genuine quantum stuff. http://www.parrypeoplemovers.com/ then look at the technology page (don't seem to be able to link directly). |
The mechanical bettery
Bettery?
Brian -- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "harry" wrote in message ... https://www.youtube.com/watch?v=_QLEERYS5C8 |
The mechanical bettery
What about the ones where you pump water to the top of a hill? The lift on
the cliffs at various places around England were operated by counterbalances witch were filled or drained of water. Brian -- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "Max Demian" wrote in message o.uk... On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. -- Max Demian |
The mechanical bettery
On 23/08/2020 09:38, nightjar wrote:
On 22/08/2020 21:34, newshound wrote: On 22/08/2020 19:52, Chris Hogg wrote: On Sat, 22 Aug 2020 18:39:31 +0100, Max Demian wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. Many years ago I read an article on flywheel-powered shunting engines. I think it was in 'The Eagle' comic, circa 1955, estimated from where we were living at the time. Flywheels have been tried as an energy storage device in modern hybrid diesel locomotives. They resulted in a reduction in fuel consumption as compared to a pure diesel, but not as much as a diesel/battery hybrid. This may have been for use in chemical plants where there could be explosive vapours. IIRC it's also been used in urban trams or buses. Not that many new ideas around apart from some of the genuine quantum stuff. Chemical plants often used fireless locomotives to avoid the explosion risk: https://en.wikipedia.org/wiki/Fireless_locomotive Don't know about locomotives , but for road transport ,they came to an abrupt abondonment. All is fine until there is an accident. The flywheel dislodges and continues like a much more energetic panjanderam, demolishing everyone and everything in its very long path. -- Global sea level rise to 2100 from curve-fitted existing altimetry data http://diverse.4mg.com/slr.htm |
The mechanical bettery
On 23/08/2020 12:13, N_Cook wrote:
snip https://en.wikipedia.org/wiki/Fireless_locomotive Don't know about locomotives , but for road transport ,they came to an abrupt abondonment. All is fine until there is an accident. The flywheel dislodges and continues like a much more energetic panjanderam, demolishing everyone and everything in its very long path. These never caught on either... https://en.wikipedia.org/wiki/Gyro_monorail ....but it doesn't con men trying... https://www.litmotors.com/ -- Cheers Clive |
The mechanical bettery
On 23/08/2020 12:34, Clive Arthur wrote:
On 23/08/2020 12:13, N_Cook wrote: snip https://en.wikipedia.org/wiki/Fireless_locomotive Don't know about locomotives , but for road transport ,they came to an abrupt abondonment. All is fine until there is an accident. The flywheel dislodges and continues like a much more energetic panjanderam, demolishing everyone and everything in its very long path. These never caught on either... https://en.wikipedia.org/wiki/Gyro_monorail ...but it doesn't con men trying... https://www.litmotors.com/ ...but it doesn't _stop_ con men trying.. |
The mechanical bettery
On Sun, 23 Aug 2020 12:06:13 +0100, Brian Gaff \(Sofa\) wrote:
Bettery? Brian It's a South African electrical storage device. -- My posts are my copyright and if @diy_forums or Home Owners' Hub wish to copy them they can pay me £1 a message. Use the BIG mirror service in the UK: http://www.mirrorservice.org *lightning surge protection* - a w_tom conductor |
The mechanical bettery
On 23/08/2020 05:15, Rod Speed wrote:
williamwright wrote harry wrote https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bull**** https://en.wikipedia.org/wiki/Flywheel#Physics Now you see, in your haste to be rude, you've missed my point. Why does a moving object have energy to give away? Moving relative to what? I personally am travelling very very fast indeed relative to certain other bodies in the universe, but I'm stationary relative to the Earth. Bill |
The mechanical bettery
On 23/08/2020 14:45, williamwright wrote:
On 23/08/2020 05:15, Rod Speed wrote: williamwright wrote harry wrote https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bull**** https://en.wikipedia.org/wiki/Flywheel#Physics Now you see, in your haste to be rude, you've missed my point. Why does a moving object have energy to give away? Moving relative to what? I personally am travelling very very fast indeed relative to certain other bodies in the universe, but I'm stationary relative to the Earth. That's the essence of the "twin paradox" (often misstated). If motion is relative, why is it the twin in the spaceship who ages less fast? -- Max Demian |
The mechanical bettery
On 23/08/2020 17:20, Chris Hogg wrote:
On Sun, 23 Aug 2020 15:12:20 -0000 (UTC), Jethro_uk wrote: The spinning mass of turbines and generators on the grid is the only form of short term storage it has. Don't planes also spin up their wheels before landing ? I don't think so. I once read that it's the commonest suggestion made to aircraft mfrs, but they don't adopt it for some reason. The fact that there's always a pronounced shriek when the tyres hit the tarmac, and that the first 100 ft or so of landing runway are a mass of rubber streaks, also suggests they don't spin up the wheels. They definitely don't. As you say, it has been suggested; I think the problem is you have to carry the motor all the time, but only ever use it for a few seconds. On an aircraft extra weight means more fuel consumption. fx googles https://aviation.stackexchange.com/questions/3702/why-are-aircraft-tires-not-pre-spun-prior-to-landing-to-preserve-them suggests that one of the problems is the gyroscopic effect on handling. And that at least one aircraft does do it on the nose wheel. Andy |
The mechanical bettery
Max Demian wrote:
That's the essence of the "twin paradox" (often misstated). If motion is relative, why is it the twin in the spaceship who ages less fast? ASPOI, the twin in the spaceship accelerates to change direction and return, the stay-at-home does not. #Paul |
The mechanical bettery
On Sunday, 23 August 2020 11:03:20 UTC+1, Graham Harrison wrote:
On Sat, 22 Aug 2020 21:34:03 +0100, newshound wrote: On 22/08/2020 19:52, Chris Hogg wrote: On Sat, 22 Aug 2020 18:39:31 +0100, Max Demian wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. Many years ago I read an article on flywheel-powered shunting engines. I think it was in 'The Eagle' comic, circa 1955, estimated from where we were living at the time. This may have been for use in chemical plants where there could be explosive vapours. IIRC it's also been used in urban trams or buses. Not that many new ideas around apart from some of the genuine quantum stuff. http://www.parrypeoplemovers.com/ then look at the technology page (don't seem to be able to link directly). 2k5 rpm is unusually low. Buses use 50k rpm NT |
The mechanical bettery
On Sunday, 23 August 2020 12:13:37 UTC+1, N_Cook wrote:
Don't know about locomotives , but for road transport ,they came to an abrupt abondonment. All is fine until there is an accident. The flywheel dislodges and continues like a much more energetic panjanderam, demolishing everyone and everything in its very long path. Yes, though that's mostly solvable. 2 counterrotating flywheels in one casing with a mechanism to jam them together on impact. NT |
The mechanical bettery
On 23/08/2020 19:40, Max Demian wrote:
That's the essence of the "twin paradox" (often misstated). If motion is relative, why is it the twin in the spaceship who ages less fast? Ever thought I have these days seem to end in a cul de sac, and I have to call it a paradox. Is all of life an unanswerable mystery? Bill |
The mechanical bettery
On Sunday, 23 August 2020 12:34:19 UTC+1, Clive Arthur wrote:
On 23/08/2020 12:13, N_Cook wrote: snip https://en.wikipedia.org/wiki/Fireless_locomotive Don't know about locomotives , but for road transport ,they came to an abrupt abondonment. All is fine until there is an accident. The flywheel dislodges and continues like a much more energetic panjanderam, demolishing everyone and everything in its very long path. These never caught on either... https://en.wikipedia.org/wiki/Gyro_monorail too many errors ...but it doesn't con men trying... https://www.litmotors.com/ what's con about that? The big issue people have with gyro balancing is that if things go wrong, stability is lost & carnage results. And IRL things go wrong & lawyers get greedy. NT |
The mechanical bettery
On Sunday, 23 August 2020 22:00:35 UTC+1, Vir Campestris wrote:
On 23/08/2020 17:20, Chris Hogg wrote: On Sun, 23 Aug 2020 15:12:20 -0000 (UTC), Jethro_uk wrote: The spinning mass of turbines and generators on the grid is the only form of short term storage it has. Don't planes also spin up their wheels before landing ? I don't think so. I once read that it's the commonest suggestion made to aircraft mfrs, but they don't adopt it for some reason. The fact that there's always a pronounced shriek when the tyres hit the tarmac, and that the first 100 ft or so of landing runway are a mass of rubber streaks, also suggests they don't spin up the wheels. They definitely don't. As you say, it has been suggested; I think the problem is you have to carry the motor all the time, but only ever use it for a few seconds. On an aircraft extra weight means more fuel consumption. fx googles https://aviation.stackexchange.com/questions/3702/why-are-aircraft-tires-not-pre-spun-prior-to-landing-to-preserve-them suggests that one of the problems is the gyroscopic effect on handling. And that at least one aircraft does do it on the nose wheel. Andy There's no upside to prespinning the wheels, other than less tyre wear, which is trivial compared to the other differences. No pre-spin means a lighter cheaper mechanism, a little free braking on contact, and a brief period of reduced friction which helps with landing stability in crosswinds. NT |
The mechanical bettery
On Monday, 24 August 2020 02:25:09 UTC+1, williamwright wrote:
On 23/08/2020 19:40, Max Demian wrote: That's the essence of the "twin paradox" (often misstated). If motion is relative, why is it the twin in the spaceship who ages less fast? Ever thought I have these days seem to end in a cul de sac, and I have to call it a paradox. Is all of life an unanswerable mystery? Bill Sorry, that question is an unanswerable mystery NT |
The mechanical bettery
On Sunday, August 23, 2020 at 10:00:35 PM UTC+1, Vir Campestris wrote:
On 23/08/2020 17:20, Chris Hogg wrote: On Sun, 23 Aug 2020 15:12:20 -0000 (UTC), Jethro_uk wrote: The spinning mass of turbines and generators on the grid is the only form of short term storage it has. Don't planes also spin up their wheels before landing ? I don't think so. I once read that it's the commonest suggestion made to aircraft mfrs, but they don't adopt it for some reason. The fact that there's always a pronounced shriek when the tyres hit the tarmac, and that the first 100 ft or so of landing runway are a mass of rubber streaks, also suggests they don't spin up the wheels. They definitely don't. As you say, it has been suggested; I think the problem is you have to carry the motor all the time, but only ever use it for a few seconds. On an aircraft extra weight means more fuel consumption. Some aircraft had curved fins on the wheel that spun it up when it was lowered into the airflow. |
The mechanical bettery
On 23/08/2020 16:12, Jethro_uk wrote:
On Sun, 23 Aug 2020 09:31:48 +0100, The Natural Philosopher wrote: On 22/08/2020 19:42, polygonum_on_google wrote: On Saturday, 22 August 2020 17:27:53 UTC+1, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 A single flywheel would surely equate to a cell, not a battery? (And certainly not a bettery. We have far too many gambling ads already.) The very term "mechanical battery" looks like a lame way of making a well-known, long-established and understood technology, with many good uses, sound like it is a new competitor. Exactly. Years ago on a flight in an aircraft packed with electronics, I asked what the whining under the floor was: 'rotary converter: generates all the power for the racks from the aircraft batteries' 'why not an inverter?''Ever seen what happens to the battery voltage when you raise the undercarriage?' The spinning mass of turbines and generators on the grid is the only form of short term storage it has. Don't planes also spin up their wheels before landing ? I have no idea. Not sure that this one did. -- In a Time of Universal Deceit, Telling the Truth Is a Revolutionary Act. - George Orwell |
The mechanical bettery
On 23/08/2020 19:40, Max Demian wrote:
Now you see, in your haste to be rude, you've missed my point. Why does a moving object have energy to give away? Moving relative to what? I personally am travelling very very fast indeed relative to certain other bodies in the universe, but I'm stationary relative to the Earth. That's the essence of the "twin paradox" (often misstated). If motion is relative, why is it the twin in the spaceship who ages less fast? The energy expresses what needs to be removed or added to make two objects stationary *with respect to each other*. -- In a Time of Universal Deceit, Telling the Truth Is a Revolutionary Act. - George Orwell |
The mechanical bettery
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The mechanical bettery
On 24/08/2020 10:02, Dave Liquorice wrote:
On Sun, 23 Aug 2020 18:23:40 -0700 (PDT), wrote: All is fine until there is an accident. The flywheel dislodges and continues like a much more energetic panjanderam, demolishing everyone and everything in its very long path. Yes, though that's mostly solvable. 2 counterrotating flywheels in one casing with a mechanism to jam them together on impact. Er, Where does all the kinetic energy go? OK in theory you have equal an opposite amounts so they "cancel out". But two identical cars traveling at the same speed in opposite directions into each other end up a right mess disspiating their kinetic energy, I think you'd get a big BANG, the desruction of the flywheels and generation of lots of high speed shrapnel. The latter might be possible to contain, they manage it with blade failures on jet engines. Yes.The problem of energy storage and safety is simple. If it all gets out at once - BIG trouble! That is why coal and uranium are so good. Its bloody hard to get it all out at once. diesel level hydrocarbons are a decent compromise as is petrol hydrogen and batteries and flywheels are plain dangerous. As is water-up-a-hill. To an extent large fixed installations can be remote and built strong, but transport needs low weight and that means compromising safety -- "The most difficult subjects can be explained to the most slow witted man if he has not formed any idea of them already; but the simplest thing cannot be made clear to the most intelligent man if he is firmly persuaded that he knows already, without a shadow of doubt, what is laid before him." - Leo Tolstoy |
The mechanical bettery
Chris Hogg wrote:
On Sat, 22 Aug 2020 18:39:31 +0100, Max Demian wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 Flywheels aren't the only mechanical batteries available. There are gravity based batteries like the "accumulators" used to work the bascules of Tower bridge. Many years ago I read an article on flywheel-powered shunting engines. I think it was in 'The Eagle' comic, circa 1955, estimated from where we were living at the time. Turning corners must be interesting if the wheel is vertical. |
The mechanical bettery
williamwright wrote:
On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bill Angular momentum. |
The mechanical bettery
On 24/08/2020 10:05, Clive Arthur wrote:
On 24/08/2020 02:36, wrote: On Sunday, 23 August 2020 12:34:19 UTC+1, Clive Arthur wrote: On 23/08/2020 12:13, N_Cook wrote: snip https://en.wikipedia.org/wiki/Fireless_locomotive Don't know about locomotives , but for road transport ,they came to an abrupt abondonment. All is fine until there is an accident. The flywheel dislodges and continues like a much more energetic panjanderam, demolishing everyone and everything in its very long path. These never caught on either... https://en.wikipedia.org/wiki/Gyro_monorail too many errors ...but it doesn't con men trying... https://www.litmotors.com/ what's con about that? The big issue people have with gyro balancing is that if things go wrong, stability is lost & carnage results. And IRL things go wrong & lawyers get greedy. NT The con is that, while it can balance, it can only be an impractical novelty, and I'm sure that Daniel Kim (Lit Motors owner) knows that. All these years and you just get a few seconds of video, usually without sound and without tripod. It's noisy - maybe that could be overcome - but it's constantly rocking about it's balance point, which can't be. The gyros can only supply one-way torque for a limited time (newton-metre-seconds?) before they hit their 'end-stops', no way round that, so to balance, the thing has to actively push against a side force so that its weight counteracts it. In the large Brennan prototype for example, as the passengers move to one side, the car tips sideways the other way to maintain balance. If you push on it with a finger, it will actively push you back, I mean actually move you back so that its weight balances against your finger. Of course, that's how it automatically leans into a curve. Imagine that in traffic with constant changing blustery side winds. Imagine one stationary near a solid object and trying to squeeze past - it would crush you. I think Kim revived the idea with a view to getting lots of investment and advance orders, he seems to have disappeared. An interesting subject though. There have been a few prototype vehicles, mostly very old, and Ford experimented with their 'Gyron'. There are some youtube videos of home made toys using the idea, I think a properly made say OO scale monorail would be fun, and maybe some sort of fairground ride - the idea of using a wire rope as a bridge is appealing. https://en.wikipedia.org/wiki/Ford_Gyron https://en.wikipedia.org/wiki/Gyrocar Wasn't there a totally above the rail (no counterweights below) gyro-stabilised monorail system somewhere, Ireland ISTR? -- Global sea level rise to 2100 from curve-fitted existing altimetry data http://diverse.4mg.com/slr.htm |
The mechanical bettery
On 24/08/2020 10:59, Radio Man wrote:
williamwright wrote: On 22/08/2020 17:27, harry wrote: https://www.youtube.com/watch?v=_QLEERYS5C8 No-one seems to know why flywheels store energy. Not really. Bill Angular momentum. That's just words. Bill |
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