Horological Meandering

AP on board as well ? Audemars Pigurt Millenary Minute Repeater Escapement

 

Opinions on the below ?

The new Audemars Pigurt Millenary Minute Repeater Escapement also uses a similar 'Double Hairspring'

Have pasted two articles from two watch reporters i follow and respect.

If one of the big three have put their faith behind it, must be something to it ?

Article 1



The intriguing large balance wheel beats with 21.600 half beats per hour and has an even more impressive power reserve of 168 hours!  

Double hairspring design of Cabinet Piece Nr.5.

Also introduced with Cabinet piece No.5 is a double hairspring. One on top of the other and attached to the studs 180° opposed as this was found to cancel out the imperfections known to affect flat hairsprings. Pretty much like a conventional overcoil hairspring, commonly called a Breguet hairspring. Reportedly this solution was born by necessity; having already chosen a large high inertia balance wheel, it was found that a matching hairspring was not readily available.

Reportedly this solution was born by necessity; having already chosen a large high inertia balance wheel, it was found that a matching hairspring was not readily available. To start right away, with height not being an issue in this specific design, the watchmakers at Renaud & Papi simply assembled two weaker but available hairsprings one on the top of the other. Instead of being a poor replacement for the 'real thing' it worked extremely well and eventually was chosen for the final design!

Source : www.tp178.com m


Article 2

Here in the Millenary Minute Repeater, the movement has slower 21,600 bpm movement, but AP uses one of those trendy new "double balance spring." These are pretty neat and are supposed to help cancel out error making the movement more accurate. Basically the balance spring attaches at two points (versus the older Breguet over-coil style attachment). If I had larger images I would show you a closeup of the escapement so that you could see what I am talking about.

Double balance springs (also called "double flat spiral here) work pretty well I hear, but I don't have a quantifiable number as to how much better they are. It is part of a brand new movement which is the Caliber 2910

Source :  www.ablogtoread.com /