The summary of my latest studies

[Richard]

...a very good point ruggero...

...can a lesser pivoted application work..? A "V" where the pivot is also the weight?

a descending, collapsing "V" weighted at pivot, would pull down on descending wheel and axle

an ascending" ^ "weighted at pivot would convert the falling weight to a "Force" as it spread in an inverted collapse, causing a torque at the axle.

richard

[path_finder]

The secret of Bessler: a 'flywheel-yoyo'?...
Many toys are usable on the street.
But regarding the previously suggested design here:
http://www.besslerwheel.com/forum/download.php?id=10058
it's obvious the cross shall be sticked to an important flywheel (the yoyo).
Although in my design I found a mechanism for the eccentrical path of the hamster, I'm sure the hamster is a yoyo
Even starting at the keeling position, if you obtain a small rotation, the CF (centrifugal force) will oblige the hamster (the yoyo) to climb, by the way contributing to the rotation, increasing the speed until the torque reaches a maximum (at 3:00).
So smaller is the central axle of the yoyo, so quicker will be rotation speed, and so stronger will be the CF.
IMHO Bessler used some rope and pulleys to do that.
This can also explain why sometime (resting by accident at 6:00) he has to reverse a little bit the wheel, allowing the yoyo to get the starting rotation speed for the climbing on the right side.
IMHO The Bessler's mechanical assembly (pulleys and ropes) did NOT support to be reversed to much, the ropes becoming a gordian knote.
At the contrary my design can support a reversal position, then left free will be much more quicker active when passing at 6:00.
Returned back now to France, and after few days of intensive reporting, I will start the building, including the 'flywheel-yoyo'...

[eccentrically1]

Didn't someone say there weren't pulleys, the translation was "pull(s)" or "pullrods"?
Anyway, good luck with your new idea.

[spacejam]

PF , wise of you to present your claims with question marks attached .

[jimmyjj]

i really like your quad pedalist Pathfinder. I keep looking at it wondering how you could build it while keeping everything mobile. Quite impressive.

[path_finder]

Many thanks for all members keeping attention to my step by step crazy quest.

After ten days of hard reporting, I had finally the opportunity to start the building of the above 'revolving cross' (quad pedalist) design.
The shot below shows the wheel with only a couple of Watt linkages.
The first tests do confirm the truth of the path shown in the previous animation.
In fact the cross is virtual because included inside the central disk acting as a flywheel (see the eight weights around).

[Fletcher]

We follow you P_F, even if we're not 'Gravity Only' advocates - your builds are inspiring - they are small, precise & of quality & remind me to get off my lazy chuff & away from a sim program occasionally - you will one day have quite a collection to look back on & quite a few valuable lessons learned along the way I'll wager.

[Jon J Hutton]

Hey Path,

Looks great....too bad there isn't a like button on here like FB. I too am trying a last ditch effort to prove to myself once and for all that a pure gravity wheel can or can't work, before siding with my friend Bob Kostoff. It looks like you have really found your nitch with plexiglass.

[KAS]

Path,

This remainds me of an attempt I made a while ago.

I had major problems with the huge friction involved.

It also appeared to to want to step during rotation.

Needless to say, I gave up on this concept and moved on.

Kas

[path_finder]

Dear KAS,
In a starwheel design like your's consisting of six linear bearings rails, the primemover cannot be otherwise than a tripod with a size of half the main wheel (a geometrical requirement). In addition the end of the arms must be left free (without any link with the outer rim)
Remember here: http://www.besslerwheel.com/forum/viewt ... 5966#55966

[murilo]

Path,

This remainds me of an attempt I made a while ago.

I had major problems with the huge friction involved.

It also appeared to to want to step during rotation.

Needless to say, I gave up on this concept and moved on.

Kas

KAS,
I liked this nice building!

The position showed in the photo is the same it stopped?

OR did the displaced star come down to 6h?

What if you give a force by hand?

Best!
M.

[path_finder]

For the builders,
I have been obliged to implement some important mechanical improvements on the flywheel disk ('revolving cross'), because the rigidity of the links were not strong enough in the last shot.
Remember the forces supported by the pedalier of a bike, and in particular the rigidity needed for the pedals axles.
It is exactly the same problem here, we have two orthogonal linkages which must keep the flywheel in a vertical plane during the rotation.
To solve this problem I installed two couples of bearings, allowing the pass-through of a strong shaft fixed to the opposite middle bar.
I made also some other improvements into the three bars 'Watt linkage'.
Now I have just to adjust the clearance for obtaining a free rotation (without shocks every turn).
Tomorrow will be another day (the last one?)

[path_finder]

just a shot showing the above depicted enforcement mechanical changes made inside the wheel.

[Jon J Hutton]

Just a question,

Has anyone ever tried a systematic approach to Besslers mt drawings.....
For example what mech did he repeat the most in his drawings.

How many times did he use a weighted arm bob as in mt 40
How many times did he use a graduated scissor
How many times did he use....

in code breaking this is a critical practice....not sure if it would work here but it is worth a try.

[Timothy]

And is he heading anywhere with them?

If so, where?