A FURTHER DEVELOPMENT OF THE G-FORCE SENSOR
RM 36-01 TOURBILLON SEBASTIEN LOEB
Composed of over 50 parts and measuring a mere 17 mm, the rotary g-sensor can be rotated manually to align in different directions, enabling drivers to view lateral deceleration as well as longitudinal forces, respectively experienced in corners, acceleration and braking on straights.
Directly connected to the bezel and sapphire glass, the sensor can indicate g-forces of up to 6 g’s. The scale indicates whether deceleration is safe (green zone) or if it reaches a critical threshold for the pilot (red zone).
This construction is a real technical breakthrough for watchmaking, requiring complex assembly and adjustment during construction, with part of the movement on the baseplate whilst other movement parts are attached to the bezel/sapphire glass construction, which is mobile, as it must turn, yet remains part of an exact timekeeping mechanism.
MODULAR TIME-SETTING MECHANISM FITTED AGAINST THE CASEBACK
Advantages for longevity and maintenance:
• Since the component is mounted outside the movement, the time-setting assembly can be changed without affecting the integrity of the baseplate in the event of a possible defect or during maintenance.
• The mounting and dismantling of this module from the back does not require removal of the hands or dial.
WINDING-BARREL TEETH AND THIRD-WHEEL PINION WITH CENTRAL INVOLUTE PROFILE
The central involute profile of the winding-barrel teeth provides an optimal pressure angle of 20°, which promotes effective rotary motion and compensates for possible variations in the operation of the going train. This, in turn, ensures excellent torque transmission and a distinct improvement in performance.
Movement diameter: 36.60 mm
Thickness: 4.59 mm
g-sensor module thickness: 10.25 mm
Tourbillon diameter: 12.30 mm
Balance wheel diameter: 10.00 mm
Number of jewels: 37
Balance: Glucydur®, 2 arms and 4 setting screws, moment of inertia 11.50 mg•cm2, angle of lift 53°
Frequency: 21,600 vph (3 Hz)
Balance spring: elinvar by Nivarox®
Shock protection: KIF Elastor KE 160 B28
Barrel arbour: nickel-free Chronifer® (DIN x 46 Cr 13 + S) with the following characteristics: stainless – antimagnetic – suitable for tempering
The three-part case of the RM 36-01 is composed of extremely advanced materials:
Rotating bezel: TZP brown ceramic, which requires a long and difficult machining and grinding process using special diamond tools.
Caseband: Made from an extremely strong polymer injected with carbon nanotubes. This combination produces a material that offers perfect protection for the tourbillon movement.
Caseback and fixed bezel : Grade 5 titanium, a biocompatible, highly corrosion-resistant and remarkably rigid alloy, composed of 90% titanium, 6% aluminium and 4% vanadium, a combination that further enhances the mechanical properties of the material.
A HOLISTIC APPROACH
The design and execution of the watch demonstrate a holistic approach to conception of the movement, case and dial. As a result, everything has been constructed according to extremely rigorous specifications, in the manner of the analytical engineering methods used in the design of Formula 1 racing cars, where the chassis and the engine are developed in complete harmony. The three-part case is water resistant to 30 metres, ensured by two Nitrile O-ring seals. The case is assembled with 12 spline screws in grade 5 titanium and abrasion-resistant washers in 316L stainless steel.