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OMEGA 1957 Trilogy Limited Editions – Railmaster, Seamaster 300, Speedmaster’57

Theognosis
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delta_dart delta_dart
I'm actually getting a good laugh out of this. You don't understand how pendulums work. The bob oscillates in arc because gravity acts as a restoring force. The bob cannot rotate in a full circle because thats not how the mechanism of a pendulum clock functions.

Everyone knows gravity pulls the ball downwards, that's literally why it keeps swinging back and forth. What eventually stops it is friction from air resistance and at the point of rotation. The energy of the ball is lost through friction and becomes heat, until the pendulum stops. Gravity does not stop the pendulum, because gravity is what moves the pendulum.

No argument there. I was particular about the UPSWING. i.e. gravity becomes a negative force at that particular phase.
 
delta_dart
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Gravity is always a negative force (points "downwards" on Earth). You don't understand how gravity works. These are your words:
"Actually, gravity becomes a detrimental factor (among many things) in the pendulum's upswing motion--and that's why it eventually stops."
Simply wrong. Gravity is not why the pendulum eventually stops.
 
delta_dart
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If gravity were the only force acting on a pendulum, it would swing forever. I can see why @Archer gave up on you.
 
Theognosis
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delta_dart delta_dart
Gravity is always a negative force (points "downwards" on Earth). You don't understand how gravity works. These are your words:
"Actually, gravity becomes a detrimental factor (among many things) in the pendulum's upswing motion--and that's why it eventually stops."
Simply wrong. Gravity is not why the pendulum eventually stops.

I think you misunderstood me. The pendulum stops on its way up and then goes down again.
 
delta_dart
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So what are you even saying? How is the fact that gravity stops the ball, and pulls it downwards to repeat the cycle a "detrimental" effect? To say that gravity is a "detrimental factor" (your exact words) implies that it negatively impacts the function of a pendulum, which is incorrect, because it is the literal only reason a pendulum works.
 
Theognosis
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https://blogs.bu.edu/ggarber/interlace/pendulum/energy-in-a-pendulum/

At its highest point (Point A) the pendulum is momentarily motionless. All of the energy in the pendulum is gravitational potential energy and there is no kinetic energy. At the lowest point (Point D) the pendulum has its greatest speed. All of the energy in the pendulum is kinetic energy and there is no gravitational potential energy. However, the total energy is constant as a function of time. You can observe this in the following BU Physlet on energy in a pendulum.
 
Theognosis
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delta_dart delta_dart
So what are you even saying? How is the fact that gravity stops the ball, and pulls it downwards to repeat the cycle a "detrimental" effect? To say that gravity is a "detrimental factor" (your exact words) implies that it negatively impacts the function of a pendulum, which is incorrect, because it is the literal only reason a pendulum works.

Again, I was particular on the UPSWING.
 
delta_dart
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Yes everyone knows that. Here is what you said:
"Actually, gravity becomes a detrimental factor (among many things) in the pendulum's upswing motion--and that's why it eventually stops."
This is wrong because gravity cannot be a detrimental factor if it is the primary mode of a pendulum's operation.
 
delta_dart
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Okay I actually get it now. You don't know what the word "detrimental" means.

det·ri·men·tal
/ˌdetrəˈmen(t)l/
adjective
  1. tending to cause harm.
    "releasing the documents would be detrimental to national security"
    synonyms: harmful, damaging, injurious, hurtful, inimical, deleterious, destructive, ruinous, disastrous, bad, malign, adverse, undesirable, unfavorable, unfortunate
 
Theognosis
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delta_dart delta_dart
Yes everyone knows that. Here is what you said:
"Actually, gravity becomes a detrimental factor (among many things) in the pendulum's upswing motion--and that's why it eventually stops."
This is wrong because gravity cannot be a detrimental factor if it is the primary mode of a pendulum's operation.

Well...

https://www.millersville.edu/physics/experiments/073/vocabulary.html

Kinetic Energy
When a pendulum bob is pulled back and released from rest, the force of gravity does positive work on the bob as it swings down. After the bob goes through the low point it swings back up, and during that upswing, the force of gravity does negative work, bringing it to rest at the top of the swing.
 
delta_dart
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Negative work is a physics term that has nothing to do with being a "detrimental factor." You either need to brush up on your physics terminology, or learn to write precisely (preferably both though).
 
orlis
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It's very interesting what you discuss but maybe you should create separate topic? It's totally off the subject of this thread.
 
sn0wman72
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Can we get back on topic??!?!?!?!?!?!

Lets talk about the the watch's not the physics of their function
 
Theognosis
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I need to make up. After more than a year, the bracelet of my RM hasn't been scratched by the clasp. I have this problem with the Moonwatch and the PO where the clasp would rub against the end links of the bracelet and leave undesirable marks that would need to be polished. Not so with the RM.

IMG_6929.JPG IMG_6930.JPG


Omega solved this problem by having the ends of the clasp look like the links of the bracelet but don't swivel at all, thus avoiding any rubbing issues. As shown in these pics, the "links" remain at an angle to eliminate any contact with the edges of the clasp.

IMG_6931.JPG IMG_6932.JPG
Edited:
 
Archer
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delta_dart delta_dart
If gravity were the only force acting on a pendulum, it would swing forever. I can see why @Archer gave up on you.

I don't give up on people easily. I'm always willing to take the time to explain things to people who will actually listen...

Actual knowledge and understanding trumps vaguely related references from quickly Googled information every time, but some people don't want to learn.

I hope that some here have a better understanding of some of the basic concepts of the factors that affect timekeeping that came out of this discussion.

Cheers, Al
 
M'Bob
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Personally, I'm not a fan of "thread killers." If a particular thread takes on an interesting tangent, in an unforced way, like this one did, why the need to comment that the discussion needs to get back on topic?
 
M'Bob
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delta_dart delta_dart
A pendulum stops because of air resistance and friction at the point of rotation. If we lived in an ideal, frictionless world, pendulums would run forever. You need to do basic research before saying these kinds of things.

If you were still referring to clocks here ( and my knowledge of this is admittedly sparse, hence the question), shouldn't it be mentioned that the spring that gets wound inside plays a role in the stoppage of the pendulum? In other words, the pendulum eventually stops because the spring no longer has the power to overcome the air resistance and friction you mention?
 
Y
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DIV DIV
My Railmaster was lonely so, I added the Seamaster 300.

Thanks for weighing them - any chance of weighing your Seamaster on bracelet? I'm thinking about picking one up second hand.
 
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