05-01-2016, 09:05 PM
Urmagerskolen skriver jo heller ikke, hvilken serie 2500 værk de har rodet med !
Jeg har sakset lidt fra WUS:
Can anyone shed some light on the differences in the various 2500 movements? B, C, D etc...
The 2500's escapement is simple, fully functional, but Omega found that they could still make a better one
The D version's escapement is almost identical to the 8500's but without the Si14 balance wheel.
It's heavily modified and more complicated than the 2500 (B, C) escapement and would be capable of running at higher beat rate in the future like the 93xx (anyway it won't happen with the 2500D).
Only the 2500 B, C and D are likely to be seen on WUS. The major differences between the three are:
The B revision had a beat rate of 28,800 and wouldn't always start from rest without a flick.
The C revision had a beat rate of 25,200 which put a little more torque into the escapement for the same strength of spring. This gave slightly lower wear, pretty well certain self starting and an extra four hours reserve for no significant loss of stability. In addition there were some minor changes to the shape of the lever, small variations in lift angle and so on.
The D revision split the coaxial wheel from two layers to three to separate the function of taking power from the intermediate wheel from the function of providing an impulse to the pallet. In the 2500C, the pinion wheel did both jobs. In the 2500D, the job of taking power from the intermediate wheel has been delegated to an ordinary cog. This leaves the pinion wheel free to do a single job well.
The C solution is the more elegant while the D solution simplifies the problem (powering the pinion wheel) to be solved. Which is the better solution is probably a matter of taste. Personally, I have two B revisions, which makes my opinion on the matter pretty clear.
I also do not believe any version of the 2500 apart from the A to be any less reliable than any equivalent movement. My reasons have been repeated so many times as to be easily found through search and so I will not bother rehearsing them here.
Allan
Jeg har sakset lidt fra WUS:
Can anyone shed some light on the differences in the various 2500 movements? B, C, D etc...
The 2500's escapement is simple, fully functional, but Omega found that they could still make a better one
The D version's escapement is almost identical to the 8500's but without the Si14 balance wheel.
It's heavily modified and more complicated than the 2500 (B, C) escapement and would be capable of running at higher beat rate in the future like the 93xx (anyway it won't happen with the 2500D).
Only the 2500 B, C and D are likely to be seen on WUS. The major differences between the three are:
The B revision had a beat rate of 28,800 and wouldn't always start from rest without a flick.
The C revision had a beat rate of 25,200 which put a little more torque into the escapement for the same strength of spring. This gave slightly lower wear, pretty well certain self starting and an extra four hours reserve for no significant loss of stability. In addition there were some minor changes to the shape of the lever, small variations in lift angle and so on.
The D revision split the coaxial wheel from two layers to three to separate the function of taking power from the intermediate wheel from the function of providing an impulse to the pallet. In the 2500C, the pinion wheel did both jobs. In the 2500D, the job of taking power from the intermediate wheel has been delegated to an ordinary cog. This leaves the pinion wheel free to do a single job well.
The C solution is the more elegant while the D solution simplifies the problem (powering the pinion wheel) to be solved. Which is the better solution is probably a matter of taste. Personally, I have two B revisions, which makes my opinion on the matter pretty clear.
I also do not believe any version of the 2500 apart from the A to be any less reliable than any equivalent movement. My reasons have been repeated so many times as to be easily found through search and so I will not bother rehearsing them here.
Allan
Never argue with an idiot.
They will only bring you down to their level and beat you with experience
They will only bring you down to their level and beat you with experience
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