Richard Mille RM 027 Tourbillon part 2

MAIN FEATURES (MANY OF WHICH ARE MAJOR TECHNICAL INNOVATIONS) TITANIUM BASEPLATE WITH BRIDGES OF ALUMINUM LITHIUM
The movement of the RM 027 Tourbillon is made from titanium and LITAL® alloy, a high lithium content alloy containing aluminium, copper, magnesium and zirconium, possessing a density of 2.55 g cm3. The addition of Lithium provides to the mechanism more flexibility and greater shock resistance. This alloy is also applied in aerospace on the Airbus A380, helicopters, rockets, satellites as well as in Formula 1. POWER RESERVE 48 hours.

VARIABLE INERTIA, FREE SPRUNG BALANCE
The free-sprung balance gives better reliability in the event of shocks, movement assembly and disassembly, and also guarantees better chronometric results over an extended period of time. FAST ROTATING BARREL (6 hours per revolution instead of 7,5) This type of barrel provides the following advantages: - the phenomenon of periodic internal mainspring adhesion is significantly diminished, thereby increasing performance; - provision of an excellent mainspring delta curve with an ideal power reserve/performance and regularity ratio. BARREL PAWL WITH PROGRESSIVE RECOIL This device permits an appreciable winding gain (circa 20 %), especially during the start of winding. It also promotes the even distribution of the mainspring’s internal tension.

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 therefore unaffected by physical manipulation during assembly or disassembly and age well.

WINDING BARREL TEETH AND THIRD-WHEEL PINION WITH CENTRAL INVOLUTE PROFILE
The central involute profile of the winding barrel teeth and pinion provide an optimal pressure angle of 20°. This promotes effective rotary motion and allows for compensation of possible variations in the engagement of the going train, thus insuring excellent torque transmission with a distinct improvement in performance.