RM 39-01 AUTOMATIC
AUTOMATIC WINDING FLYBACK CHRONOGRAPH AVIATION
A DIRECT DESCENDANT OF THE RM 039
The complexity of the tourbillon model, which took at least seven years to develop—four years longer than planned—enabled us to address many issues in terms of the functions. Directly based on the RM 039 Tourbillon, this automatic model has many of the functions and complexities of its big brother.
The RM39-01’s movement is designed as a flight navigation instrument. This highly technical and extremely sophisticated watch is a modern interpretation of a device that is essential for any experienced pilot: the E6-B slide rule.
Automatic winding movement with hours, minutes, seconds at 3 o’clock, oversize date, month, flyback chronograph with central seconds counter, minutes and countdown counters at 9 o’clock, hour counter at 6 o’clock, UTC function and variable-geometry rotor.
Actual power reserve results will depend on how much the chronograph features are utilised.
BASEPLATE AND BRIDGES MADE OF GRADE 5 TITANIUM
This combination further enhances the material’s mechanical properties, which explains its frequent use in the aerospace, aeronautics and automobile industries.
The baseplate of the RMAC2 calibre has been optimised to achieve an extremely low weight/resistance ratio.
The skeletonised baseplate and bridges have been subjected to intensive and complete validation tests to optimise their resistance capacities.
This was originally developed for pilots, to avoid wasting time (and therefore accuracy) by stopping, resetting and starting the chronograph whilst crossing a navigational point.
OVERSIZE DATE DISPLAY
By adjusting the placement of the rib, the rotor’s inertia is modified to either speed up the winding process in the case of leisurely arm movements, or to slow it down during sporting activities.
• Central flange in grade 5 titanium
• 18K white gold weight segment
• Weight segment with 6 possible positions adjusted
by screws in grade 5 titanium
• 18K white gold wings
• Ceramic ball bearings
• Unidirectional anti-clockwise winding
Thickness: 9.00 mm
Number of jewels: 68
Balance: Glucydur®, 4 arms, moment of inertia 4.8 mg•cm2, angle of lift 53°
Frequency: 28,800 vph (4 Hz)
Balance spring: elinvar by Nivarox®
Shock protection: INCABLOC 908.22.211.100 (transparent)
Escapement wheel jewels: Rubifix (transparent)
Three-position stem: Manual winding, date adjustment, time setting
CASE IN CARBON TPT ® AND ORANGE QUARTZ TPT ®
After a turning operation lasting 1 hour and 40 minutes, no fewer than 800 milling operations taking several hours are required. Machining demands nearly 11 hours of separate operations. This is followed by a meticulous quality control procedure that occupies a full day for each case.
The 3 pushers, their components and the crown of the RM 39-01 require 10 days of machining, during which they undergo numerous tests for water-resistance and quality control, followed by hand brushing and polishing of the entire case. All of these stages are vital in producing the characteristic ergonomic quality of Richard Mille watches.
BIDIRECTIONAL BEZEL WITH E6-B SILDER RULE
The E6B slide rule requires no power supply, making it an extremely safe-flight instrument for pilots, even today.
The E6-B slide rule features a fixed bezel and a bi-directional rotating bezel, both marked with several complex indications. It can be used to read and calculate fuel consumption, flight times, ground speed, density altitude and wind influence, and to convert units of measurement (knots/km/gallons/ litres/ft/kgs/lbs) quickly. During flight preparation, the E6B slide rule therefore remains the most accurate device for determining fuel load and density altitude (essential for take-off and landing).
Read off is facilitated by the addition of a movable pointer incorporated into the case that pops-up when a release button is pressed, thus ensuring a more accurate readout.
• Burnished pivots
• Diamond-polished sinks on the bridge side
• Pinions with undercuts
• Screw slot and screws bevelled and polished with rounded and polished tip
• Minimal corrections applied to the wheels in order to preserve geometry and performance
FREE-SPRUNG BALANCE WITH VARIABLE INERTIA
SPLINE SCREWS IN GRADE 5 TITANIUM FOR THE BRIDGES AND CASE
This permits better control of the torque applied to the screws during assembly. These screws are unaffected by physical manipulation during assembly or disassembly and age well.