Re: MORE/Opps, almost forgot one...


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Posted by MrTim (152.163.188.5) on March 21, 2003 at 22:10:55:

In Reply to: MORE/Opps, almost forgot one... posted by David on March 21, 2003 at 17:26:32:

: Besslers first statement of his clues,

: >let him ponder the rich pageant of words
: which I now cause to shower down upon him!

: SHOWER! Again, water.

: I was a bit rushed so I realize my very first posting on hydralics may have been a bit convoluted, so in case I'm not fully understood.

: 1. A wheel with an inner pressurized chamber (positive or vacuum), extending outwards from this in spoke like protrubances towards the outer rim are hollow tubes, inside of which are pistons.

: 2. When the paired weights are at the 9 and 3 oclock position a lever is engaged which releases a small amount of pressure, causing these weights to move to the side, where one is closer to the rim, one is further away. Gravity causes the wheel to move, disengaging the lever. A spring is used to pull the lever to close off the pressure.

: 3. The torque generated by the movement of the wheel is used to run a pump to feed some energy "pressure" back into the "heart" ei. pressurized chamber, of the wheel.

: 4. Possibly an ideal arrangement of weights and their movement was employed so very little energy was used to move them.

Ok, not to be too critical here, but I'd like to see how you would pull off #3 above, as the wheel was a self-contained system (ie 'nothing from without the wheel in the least contributes to it's motion' - Gravesande) For instance, would you use a chain-drive and weights to run your pump WITHIN the wheel?
And also, where do you release the pressure to? If you release it to outside the mechanism, you increase the chance of a leak in the system (as even a minute pinhole leak will bleed out your pressure. The same goes for a vacuum, in which case atmospheric pressure will bleed in...Sure, it'll take time, but it will happen.)
And as to the pistons, how would you minimise leakage between the cylinders and the tube walls? Using 18th century materials? (Early steam engine pistons were notorious for their inefficiency.)
If you don't have a perfect seal (and/or are releasing the pressure back into the system), how long would it take for the pressure differential to equalize? AND what would this do for FRICTION within the system? It would tend to increase it, right? Add weights and your inefficiency would increase even more...
No, sorry, I don't buy the hydraulic theory of operation of Bessler's wheel. Especially as Karl said it was simple enough for a carpenter's boy to build. What you are positing would require a well-stocked machine shop to build. And that means a LOT of close-tolerance work. (And that's not simple...)
MrTim


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