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Updated Daily: January 2009

 
  Columns > Ron DeCorte > Double Tourbillon 30º

   Published in: Pilot Issue
 
Text Size: GR | GR | GR
(Drawing courtesy of Greubel Forsey)
The GREUBEL FORSEY tourbillon uses two mainsprings to ensure a stable and long power reserve (72+ hours). The mainsprings are manually wound via the winding/setting crown. From the mainspring barrels the power is transferred to the tourbillon via two spoked wheels. The smaller spoked wheel drives the tourbillon directly at its perimeter allowing the tourbillons to be easily viewed. It also creaties a more efficient operation than most typical tourbillons.
 
 
The outer tourbillon cage rotates clockwise in a parallel plane with the movement, one revolution every four minutes…
…while the inner (inclined) tourbillon cage rotates clockwise within the outer cage one revolution every minute, and is inclined at 30 degrees.
 
 
And now for the question that has been burning your brain since you started reading, why did they do it?

Well let me say that there is good reason for the GREUBEL FORSEY design, and it wasn’t just another exercise in micro mechanical showmanship.

     
 
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