The summary of my latest studies

[Richard]

Dear Path finder

You've done a wonderful job of harnessing the horse in front here.

It seems clear to me that the eccentered posistioning method you employ is superior to Besslers mt 20

I wish you all good look and good speed.

richard

[path_finder]

Dear Richard,

It's a long way... says the song...
My intend now is to experiment different kinds of primemover.
There are a lot in my album (http://www.besslerwheel.com/forum/download.php?u=1323)
per example these:
http://www.besslerwheel.com/forum/viewt ... 8218#58218
http://www.besslerwheel.com/forum/viewt ... 2241#62241
http://www.besslerwheel.com/forum/viewt ... 1527#71527

But IMHO the most efficient (and successful) could be for sure finally this one:
http://www.besslerwheel.com/forum/viewt ... 6725#56725

I have only one fear: the not large enough size of my wheel.

[Richard]

Dear path_finder

This link that you,ve included


But IMHO the most efficient (and successful) could be for sure finally this one:
http://www.besslerwheel.com/forum/viewt ... 6725#56725

I am in agreement with what is your hope..

Thank you very much..

It is a measure and a degree of control, in your design, that puts a smile on my face.

I continue to hope in your success.

richard

[Timothy]

path_finder:

In agreement with Richard, good design in that link.

May GOD guide you.

[Grimer]

May GOD guide you.

Amen

[path_finder]

During my latest experiments I discovered an important rule for the 'hamster design': the circular path of the hamster must be greater than the outer rim of the main wheel
This point could be dark for a lot of people, so far the purpose of the drawing below is for clarify the rule.
In red is the inner rim of the wheel (radius R), and in green is the virtual circle (radius 2xR) where the hamster is virtually climbing.

If the hamster is rolling along the inner rim of the main wheel (in red), the resultant force is almost radial, and the torque is about null.
Instead if the path of the hamster is a greater circle (in green), the radial resultant force is able to generate an usable torque.
This is the reason why any linkage with the central axis will give no result at all (this point being already suspected before and discussed in an old thread).

On a practical way, and as result of this important rule, we can now say: obviously the hamster must rotate on the inner rim of a circle, but not on a centered circle.
This circle must be obtained from the outer rim.
We must use a mechanism able to locate the center of this circular path above the main wheel axis.
I understand now why the mechanism of the flowerbowl was so fundamental, allowing the suspension of a primemover from the outer rim and NOT from any linkage with the main axis: the hamster rotates with no physical contact with the rim of this circular path, and its eccentricity is now able to generate an usable torque.

[Richard]

Dear Path_finder

Thank you much..as I continue to appreciate you sharing in the progress.

May we assume that you'll continue to employ the prime mover (with-out change)..as only the radius changes?

As I've understood ( or perhaps did not), it was the ecentered orbit of the primemover which is to prove the sustained motion?

forgive my ignorance...I'll search for references to this " Flowerbowl" which you mention.

If history proves that , only pass through the axle area...makes the PM possible...Then Besslers statement of...."I could not get the vision of the roasting spit out of my mind" is of greater importance perhaps.

richard

[path_finder]

Dear Richard,
Many thanks for your attention,

My reference for the flowerbowl is in relation to the mechanism allowing a centered rotation without a central axle neither radial spokes, like explained earlier here:
http://www.besslerwheel.com/forum/viewt ... 8476#58476
For a better understanding, see also (gain): http://www.besslerwheel.com/forum/viewt ... 3848#63848

My intend is to replace the four small rods furnishing today the eccentricity (see the previous shots), by a mechanism similar to this one above but of 'order four' (instead order three), in view to oblige the center of the circular path to be above the center of the main wheel.

[Richard]

Path...

did you see the irony of the link you directed me to?

LOL...the link is two years old , to the very day...ha!

[path_finder]

For the builders I share here my new mechanical feature: an easy and cheap gravity ratchet
The purpose of this very simple gimmick is to save the path excursion of the impacted weight (a very famous question)...
The shot below shows how a simple jigsaw blade can be used in view to do the job.
The teeth are oriented in that way when the weight B is impacted by the A weight (going up quickly from the bottom and accumulating a kinetic energy under the centrifugal force given by the spring) and moved to the right side (for a clockwise rotation), the return of this pendulum to the center is temporarily forbidden, assuming the continuity of the unbalance.
This is true so long the wheel has not terminated his half turn, the reset of the ratchet being automatically made by its reversed position.
At the time of the shot only one ratchet was installed. By chance I had in stock four blades from Bosch.

[jim_mich]

Hmmm... looks like your ratchet might end up sawing off the long leg of the ell bracket. :))

[path_finder]

Dear Jim_Mich,
You are absolutely right. But the time could be sufficient for the verification of the cinematics.
Then we can replace the blade by a more conventional rotational clutch on the axle of the weight. We recognize here the good experienced observer!...

[Grimer]

We recognize here the good experienced observer!...

He certainly is that.

[path_finder]

The previous topic is perhaps not significant for most of the readers.
The reason is simple: first you must have the appropriated carriage in relation with the purpose of the device.
The animation below shows how the principle of the 'impact gravity wheel' can be implemented. This is a personal suggestion, and I don't pretend it is the design used by Bessler, even if surprisingly some clues are assumed. The weights are working by pair, one impacted becoming later the impacter (alternatively). Each must be reversed, like the top in MT138, and the impact occurs at the top like the hammer in the toy.


The spring (in violet) is the link between two opposite arms.
The arm color indicates the logical position of the associated ratchet (see the topis above): green if free, red if 'reverse forbidden'.
When impacted the weight at 12:00 is ejected to the right, and the ratchet locks it at the maximum excursion, converting and keeping the kinetic energy into potential energy. At 2:00 the excursion is extended by the gravity.
The ratchet is supposed to be suppressed after a certain rotation of the wheel (see above), allowing the impact at 7:00 under the acceleration given by the spring.

This principle seems correct but shall perhaps be improved:
Indeed there are a lot of parameters:
- the length of the arm supporting the weight
- the length and the force of the spring
- the position of the axles for the spring attachment
- the nature, the size and the mass of the weights
- the size of the wheel , etc.
Only the building can fix the best values of these parameters for the maximum of efficiency.
Even if this principle has been confirmed excellent by the experiments, the values in the animation are not the best ones.
In my final version this mechanical sub-assembly has been doubled (four weights) and there is an additional feature improving the swing.

This 'impact based design' is the first of my four personal valid principles.
IMHO it is not very useful for an industrial use (lack of reliability, to much shocks, etc.)
But it allowed me to better understand how the other principles: I know today how the flowerbowl works (much more clever and simpler).
I will also publish soon a possible explanation of the Buzzsaw/Keenie wheel, in relation with the same principle.

[Grimer]

I will also publish soon a possible explanation of the Buzzsaw/Keenie wheel, in relation with the same principle.

I look forward to it.