MT 17

[killemaces]

Have this drawing been discussed before?

The center is drawn in a peculiar way, and also what is the "drumstick" on the top ?
And why is it there????

Is Bessler saying that the shape of the center is the solution?


Rune

[nneba]

Rune,

The "drumstick" is the tension point of the inner string/elastic, when the ball reaches the begining of the drumstick (right) the elastic is fully extended, once the ball passes the left side, the elastic begins to slack off.

em...I think

nneba

[ovyyus]

The "drumstick" is the plan view of a curved pivot arm and weight.

[Lightwave]

but why is the "plan view " there? its not an important detail or shape, this added drawing has always confused me, does it matter that it is thicker at the axial. it would work the same as a curved pipe or flat square bar with weight at end.

[Tarsier79]

The "drumstick" shape can be seen in other MT drawings.... maybe you have to consider its application elsewhere. Look for example at MT15/MT16 page(original, not reproduction).

[Unbalanced]

I agree with the "drumstick" being the plane view of the individual weighted leaf spring arms. I have built five variations of MT17 to no avail but I still believe this and MT 18 will be found to be incorporated in the final solution.

What I don't get about MT 17 is the length - tension of the chain/cable/ rubber band etc that links these weighted leaf springs. The one linking the two between 12:00 and 8:00 shouldn't look like that, it should be taught.

[Unbalanced]

Hi lightwave, You wrote: "but why is the "plan view " there? its not an important detail or shape,"

This may well be true but there was a time I thought that perhaps it was of the utmost importance. One of the MT17s I have constructed used this tapered, weighted leaf spring design. I was unable to accurately measure the exact ratio of this taper (from Bessler's Illustration) and so I used the ratio of the Fibonacci number;
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 and bent my leaf springs into the shape of Fibonacci Spirals.

Needless to say my wheel which was a thing of beauty (like looking at a Nautilus shell that has been cut in half) had no tendency for continuous rotation.

I still wonder why Bessler has drawn MT17 with an incongruous linking mechanism.

[Unbalanced]

Hi lightwave, You wrote: "but why is the "plan view " there? its not an important detail or shape,"

This may well be true but there was a time I thought that perhaps it was of the utmost importance. One of the MT17s I have constructed used this tapered, weighted leaf spring design. I was unable to accurately measure the exact ratio of this taper (from Bessler's Illustration) and so I used the ratio of the Fibonacci number;
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 and bent my leaf springs into the shape of Fibonacci Spirals.

Needless to say my wheel which was a thing of beauty (like looking at a Nautilus shell that has been cut in half) had no tendency for continuous rotation.

I still wonder why Bessler has drawn MT17 with an incongruous linking mechanism.

[Unbalanced]

oops! sorry about the double post.

[rasselas]

Unbalanced... maybe it's not elastic/rope, but rather a pulley... just guessing as i've not worked much with this design... but it was always my understanding.