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Home > Technical Chat > Flywheel Materials, FAO any material scientists out there.

Vegard

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7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

15th Jul, 2007 at 08:29:37pm

There are several pros and cons of stealing if that's what you mean! If you're thinking of stealing alloy, and the pros and cons of that, aske the Pikeys!

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

Hedgemonkey

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591 Posts
Member #: 360
Stu from Corwall aka Mr Jazz Piano, Love_Machine, kneegrow

23rd Jul, 2007 at 09:09:33pm



There's my ally wheel ^^^^

and the backplate vvvv

Beautiful.....

Snag is, I have big scruples about it exploding. It is a BMC ST jobby which has been modified quite a lot. The ring gear and the bit outside the holes weighs nothing and if it came adrift, is unlikely to get into the cabin. The middle bit is quite sturdy and probably wouldn't come to bits.

I like the idea of light flywheels, I can really appreciate the physics involved.

I can't remember what the actual equation is for what actually happens but it depends on the radius of gyration, which is something to do with where the centre of weight+some gyroscopic stuff is. Weight at the edge lost behaves differently due to inertia than stuff in the middle.

Making a flywheel and getting it balanced is not too difficult, provided you have access to the kit. Calculating the lilihood of it flying apart is another. There is the approach of using A++++ material and taking a load off and then there is the mathematical approach. Actually estimating the safety of an old wheel with god knows what flaws and material attributes is difficult. I would have thought magnesium would have been a good idea. But sparks from the associated paddle clutch could make it interesting. I suppose you could have a load of copper carbonate in there and when it warmed up, it would sit in a CO2 atmosphere *happy*

I'd like to know more about Ti and it's cost and availability.

Bugger off, I'm getting there.

Rob H

4314 Posts
Member #: 700
Formerly British Open Classic

The West Country

28th Jul, 2007 at 08:09:23am

Nice wheel & back plate

On 23rd of Jul, 2007 at 09:09pm Hedgemonkey said:
I can't remember what the actual equation is for what actually happens but it depends on the radius of gyration, which is something to do with where the centre of weight+some gyroscopic stuff is. Weight at the edge lost behaves differently due to inertia than stuff in the middle.


Having studied electronics you're allready one step ahead of me. I'm guessing that the other part of the flywheel is moving faster and therefore experiances greater G force, whilst the inner is under greater tension due to the mass of the outer.

On 23rd of Jul, 2007 at 09:09pm Hedgemonkey said:
Making a flywheel and getting it balanced is not too difficult, provided you have access to the kit. Calculating the lilihood of it flying apart is another.


I think you hit the nail on the head there, and that is what I'm failing to get to grips with. Alot of the info I come across is along the lines of "xyz" works for me.

[quote=Hedgemonkey,23rd of Jul, 2007 at 09:09pm]
I'd like to know more about Ti and it's cost and availability./quote]

Mr Austin is the man to talk to about these:

http://www.foxwebsitedesign.co.uk/index.html

Isambard Kingdom Brunel said:
Nothing is impossible if you are an Engineer
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