The architecture of the revolving satellite complication of the UR-110 has three levels of complexity: a central carousel providing the mechanism with stability and equilibrium; planetary gearing assuring the parallel rotation of the three hour satellites as they orbit the dial; and three counter-rotating hour modules - each comprising an hour satellite, minute hand and counter balance - mounted on a planetary gear. These three modules are in constant counter-rotation to counteract the direction of rotation of the central carousel. Small seconds, a Day/Night indicator and an Oil Change indicator complete the complications.
The automatic winding system of the UR-110 is regulated by fluid dynamics of dual air turbines. As long ago as the 18th century, clockmakers were using air friction to regulate the speed of chiming clocks, and their techniques evolved to become
the preferred method of regulating the rate of chimes on minute-repeaters. With the UR-110, URWERK use the two turbines to minimize shocks when the uni- direction winding system is winding and minimize wear when the winding rotor is freewheeling in the opposite direction.
Model : UR-110 ZrN Torpedo
Case : Titanium with bezel in 316L sandblasted stainless steel treated with *Zirconium Nitride (ZrN); caseback in titanium; surface finishes micro-sandblasted
Movement : calibre UR 9.01 self-winding, unidirectional winding rotor coupled to twin turbines
Indications : Revolving satellite complication with rotating hour/minute modules mounted on planetary gears. Control board: day/night indicator, "oil change" indicator and running seconds
Dimensions : 47mm x 51mm x 16mm
*Please note that ZrN (Zirconium Nitride) is an industrial treatment that can result in variations in and the colour/hue on the bezel and between individual models.