I guess the "maths" is just not interesting.
Hi there The chronometric refers to reference to a clock. The clock - escapement movement is powered by the drive cable. The purpose of the clock movement is to time the movement of a meshing gear which mates with another gear driven in relation to the speed of the drive cable. The meshing gear is in contact with the drive gear for 0.6 of a second. Thus the pointer moves in increments of 0.6s. The faster the speed the further the pointer moves in the 0.6s it is engaged. This all means that the pointer jumps to a new reading every 0.6s. The movement in these speedos is a masterpiece of engineering. These speedos contain 100s of parts in comparison with the modern magnetic ones.Hope this is clear enough?Stu
Just for the record, this is mine in action: http://www.youtube.com/watch?v=c1dqq2Kt2ko (ftp://http://www.youtube.com/watch?v=c1dqq2Kt2ko)
Right i`ll try again: http://www.youtube.com/watch?v=c1dqq2Kt2ko I think i`ve cracked it this time (should have done it before a beer!)