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Registered Member #340
Joined: Thu Mar 23 2006, 06:05PM
Location: NY
Posts: 5
I know that a "sphere" is the best shape, but I have seen ones (commercial) that are squashed on the bottom (sometimes the top too). What benifits does this offer?
What about the radius of curvature at the entrance to the hole on the bottom of the generator? Is there a size that would be better?
Does the flattened bottom allow for less of "turn" into the hole, making it better that way somehow?
Registered Member #49
Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
EastVoltResearch wrote ...
its not really better. the first shape is much easier to spin then the bottom shape. this is the reason it being shaped the way it is.
That suprises me. Given that it is assembled in halves, the top half demonstrates that sphereical hemispheres are very possible to manufacture. Putting a hole in it shouldn't have anything to do with the spinning process.
Why are we overlooking the fact that the radius of curvature is significantly smaller in the sphereical exmaple than in the one with the flattened bottom.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Geometrically, oblates (first example) do tend to focus charge towards the upper end where spheres will tend to distribute more evenly. This could be another reason, although I do remember speaking with the master over at Science First and he stated that the oblates are easier to spin than spheres.
Registered Member #340
Joined: Thu Mar 23 2006, 06:05PM
Location: NY
Posts: 5
I'm trying to figure out how to say this without sounding terse, bucause I don't mean to sound terse, but I'm not looking for manufacturing reasons, I'm looking at performance reasons.
i.e. If I wanted to get the least amount of leakage (i.e. the best product, longest spark), which would be better? and why?
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
I think i just stated why an oblate might be used performance wise. With an oblate, the charge gets focused towards the upper end of the oblate whereas a sphere, the charge tends to be uniformly distributed.
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Best shape for VDG collector?
