Questions tagged [flywheels]

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Could this flywheel assembly have been safely built in 1960-62?

Reference: This question from Worldbuilding. I'm writing a time travel story set in 1962 and I'm in need of an analogue to Doc Brown's plutonium (or bolt of lightning!). What I settled on for my ...
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-2 votes
0 answers
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Maximum rotational speed of steel flywheel allowed by material mechanical strength [closed]

Given a cave cylinder flywheel made of steel (the most stiff and mechanical resistant on the market), with external radius of 0.5m, internal radius 0.25m (heigth if does matter 0,5m): How do I ...
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0 votes
0 answers
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Flywheel design equation (angular speed)

What value of average angular speed (ω avg) should we take while designing the flywheel out of the varying speeds of engine depending on its acceleration. And should we just assume Cf(co-eff. of speed ...
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-1 votes
3 answers
78 views

Flywheel effect on Engine speed

Do crankshaft rotate at constant speed in an IC engine for a given RPM after application of flywheel? If not, then how do we get constant speed at vehicle wheel?
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0 votes
3 answers
104 views

Why no big and slow flywheels for utility-scale energy storage?

The flywheel research I see usually focuses on small, high-speed (thousands of RPM) flywheels, often with an emphasis on transportation-related applications. The largest rotating building in the world ...
0 votes
1 answer
95 views

MSC Adams: “angular kinetic energy” vs “angular momentum about a center of mass”: which is the most relevant measure of the flywheel's storage?

MSC Adams produces several different measures of a rotating body. In a flywheel, what is the difference between 'angular kinetic energy' (in newton-mm) vs 'angular momentum about the center of mass' (...
2 votes
0 answers
96 views

Optimum spoke shape for wheels made of solid material

Currently I am designing a bicycle sprocket to be laser-cut out of 3mm steel. Steel is heavy, so I want to make some lightening cut-outs, and I want to optimize the shape of the cutouts. I will ...
6 votes
3 answers
2k views

What do you call a mechanism where rotation is transfered in one direction only?

I have the following to wheels that rotate on the same axis: Assuming that they are stuck together, if I rotate the green one the red one rotates at the same speed and when I stop the green one the ...
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5 votes
1 answer
1k views

Calculate Forces on a Flywheel

I am working on a flywheel currently, and I was wondering what is the force needed to recenter the flywheel when it is spinning and it is nudged slightly off axis? Is it related to gyroscopic ...
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5 votes
1 answer
234 views

Balancing flywheel and coupling shaft at home

I am rebuilding a mini soil compactor roller. I replaced the old 8 hp Kubota diesel engine unit with a new Dongfeng unit. I want to weld the coupling shaft, which is built from 2" pipe with rubber ...
6 votes
4 answers
1k views

What are the technical obstacles for using flywheel-based regenerative braking on bicycles?

Is it possible to convert the energy you would normally lose when braking your bicycle to rotational energy by attaching an extra wheel which would start to rotate once you use your brakes? E.g., when ...
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