... or does it.
As I struggled against gravity to hoist myself out of bed this morning, it got me to thinking about what the challenges are (if any) to using a mechanical watch in space. Obviously positional variation would go away as gravity would no longer interact with the balance, but how would a watch maker compensate for that? Even a watch with perfect isochronism, the balance is being impeded by gravity. Held back, friction against the jewels increased.
I'm also thinking the hairspring has to be "weakened" because it's not oscillating against gravity. In my mind without gravity the watch would run fast and this would need to be compensated for and that probably applies to the rest of the train as well. Would the pivots float in the jewels reducing friction and causing a speed increase or would the surface tension of the oil maintain a consistent resistance.
And lastly how would engineers compensate if any or all of my theories are correct. How do you adjust/regulate a movement when you can't be in the same environment and physical conditions you are trying to counteract.
Or maybe it runs normally