====== IWC 5011 ======
**Cal. 5011** is an oversized [[in-house]] [[eight day]] movement in the [[IWC 50000|Cal. 50000 family]] produced by [[IWC]] since [[2002]].

===== History =====
On its release in [[2000]] in the limited-edition [[IWC Portugieser 2000]], [[IWC]]'s [[IWC 5000|Cal. 5000]] was lauded by the brand's followers. It marked the restart of completely-[[in-house]] watch movement development for the company and brought back the legendary [[Pellaton winding]] system. The movement was seen as a landmark in other ways, with 8-day power reserve, automatic winding, and a massive 16.75 [[ligne]] (38.2 mm) diameter.

In [[2002]], IWC introduced the [[IWC Big Pilot's Watch 5002|Big Pilot's Watch, Ref. 5002]] with a new version of the Cal. 5000. The new **Cal. 5011** brings [[central seconds]] and a [[date window]] to the movement family for the first time. The circular [[power reserve indicator]] dial at 3 00 remains, giving watches using this movement a unique appearance. Cal. 5011 was updated in [[2006]] with faster 21,600 A/h operation to become **Cal. 51110**, and was used in the new [[IWC Big Pilot's Watch 5004|Big Pilot's Watch, Ref. 5004]]. This was further updated in [[2008]] as **Cal. 51111**, which continued in Ref. 5004 and was also used in [[IWC Big Pilot's Watch 5009|Ref. 5009]] after [[2012]].

The fact that Cal. 5000 uses a single mainspring and barrel has impacted the reputation of this movement. As admitted by [[Richard Habring]] and other IWC staff, the watch was meant for "weekend wear" and is thus tuned to keep time accurately over a week. But the single mainspring does not deliver power consistently, so the movement runs quite fast for the first two days, more predictably for the next few, and slows down at the end. This causes issues for timing, maintenance, and daily wear. The next-generation [[IWC 52000|Cal. 52000 family]] used [[double barrel]] construction to deliver more consistent torque and timing throughout the week.

===== Applications =====
  * Cal. 5011 (2002-2006) 18,000 A/h
    * [[IWC Big Pilot's Watch 5002]] (2002-2006)
  * Cal. 51110 (2006-2008) 21,600 A/h
    * [[IWC Big Pilot's Watch 5004]] (2006-2008)
  * Cal. 51111 (2008-present) 21,600 A/h
    * [[IWC Big Pilot's Watch 5004]] (2008-2014)
    * [[IWC Big Pilot's Watch 5009]] (2012-present)
    * [[IWC Big Pilot's Watch 5019]] (2012-2015)
    * [[IWC Big Pilot's Watch 5020]] (2016-2018)
  * Cal. 51113 (2007-2011) 21,600 A/h
    * [[IWC Big Ingenieur 5005]] (2007-2012)


<WRAP ud ud_mov>

**Description:**
  * [[Automatic]] movement
  * Bi-directional winding ([[Pellaton winding system]]) on spring-mounted [[rotor]], cam disc, ruby wheels and 2 latches on ratchet wheel, gear reduction 175 1
  * [[Escapement]] stone lever
  * [[Yoke winding system]]
  * [[Breguet hairspring]]
  * [[Incabloc]] [[shock protection]]
  * Two-armed [[screw balance]] with 16 weight srews and 2 adjustment eccentrics on the escapement arms
  * [[Hairspring]] Nivarox 1 with Breguet bending
  * IWC [[precision adjustment]] hairspring stud and regulator adjustable with eccentric
  * [[Bridge]]s and plate nickel coated, engravings gilded, decoration of type "Côtes circulaires"
  * [[Weight segment]] IWC-style (without gold medaillon) with gilded Probus-Scafusia engraving, plate wheel, crown wheels, [[ratchet]], barrel lid and [[differential gear]] with [[solar grinding]]

**Functions:**
  * Hours, minutes, [[central seconds]]
  * [[Hacking seconds]]
  * [[Power reserve]] indicator at 3 00
  * [[Date window]] at 6 00 with [[Quickset date feature]]

**Data:**
  * 16,75 [[ligne]]s
  * Ø 37.8 mm
  * Height 7.6 mm
  * 42 [[jewels]]
  * 18,000 or 21,600 A/h
  * [[Power reserve]] [[8-day|204 h]], limited to 168 h

**Production period:**
  * Production [[2002]]-Present
  * Successor [[IWC 52110]]
</WRAP>
===== Weblinks =====
  * [[http://www.iwcforum.com/Articles/2002/5011text.html|IWC's New Calibre 5011]], iwcforum.com, Michael Friedberg, April 2002
  * [[https://www.iwc.com/forum/en/discussion/4084/|IWC Forum: Calibre 5000 & 5011]], iwcforum.com, Richard Habring, January 29, 2003
  * [[http://www.thepurists.net/patrons/members/jackforster/iwc/iwc_reve.htm|IWC Reference 5001]]


{{tag>Movements Automatic_movements IWC_calibres}}