GearHeads Corner

short video of my ticker

https://www.youtube.com/watch?v=KYhEp9Qu70E

Would like to get more spins per flick !
Are these possible solutions to this ?

1 increase the weight ( would rather not do, feel 2lbs is enough)
2 reduce number of teeth on chrono ratchet ( make the flick last longer )
3 increase size of chrono pallet (flick will have more effect as it will be further from the shaft ?)
4 reduce the gearing of the gear train (at present about 10:1)
5 increase size of the drum that the weight is wound on (will produce more power but not last as long. Double diameter twice the power?))

could someone confirm above statements are true
which is the best option ?
combination of all except 1 ?

feel I need to do something as spins will reduce when I add pattern arms ?



Any thoughts from those somewhat more experienced than myself would be appreciated, before next prototype is embarked upon.

Many thanks

Ian

Hi Ian:

  Great work. Fun isnt it?

>>1 increase the weight ( would rather not do, feel 2lbs is enough)

  Nope, its not really about weight, in fact the lighter the better in many ways..

2 reduce number of teeth on chrono ratchet ( make the flick last longer )

  This can help, the fewer teeth the more push....

3 increase size of chrono pallet (flick will have more effect as it will be further from the shaft ?)

  No, not really, the energy of the push will be pretty much the same due to stroke distance change.

4 reduce the gearing of the gear train (at present about 10:1)

  Can help..but then you get less wind...

5 increase size of the drum that the weight is wound on (will produce more power but not last as long. Double diameter twice the power?))

  Same deal, less time.

    Your facing the same issue all clock makers face. You really need to consider the flywheel
as a pendulum. Clockmakers get lots of time by making the pendulum longer,
this slows it down. When you add arms it will get slower, simply as
a result of the radius growing.. ( pendulum gets longer..).
Make that wheel the same weight but 3 foot round, and it will go much slower..
    Weight matters, but not like radius. Your flywheels resistance to
directional change , or length of time is really a funciton of its rotational
inertia, which is the mass times the radius squared. I = MR^2;

  This formula tells you weight , while important, is subservient to radius
which has an exponential effect as its squared to the mass. So generally
you add weight to a pendulum to keep it from being too flimsy,and add length
to make it slow. OR, if the length is as long as you can have it, you then add weight..

Leastways...thats what I do...

Art

Thanks for all that Art

Know you are busy with Webcam stuff so thanks for taking the time



Ian

anytime.. :)

still having fun  I think
added some simple arms

https://www.youtube.com/watch?v=RTWIHosYgN0

as you can see only get about 90 deg swing from each impulse !!

still think I need more power from each impulse

No sure which of options 1-5 to try first maybe a mixture of them all


Ian

Ian:

Bit more weight maybe?

Art