RM 50-27-01
RM 50-27-01
RM 50-27-01

RM 50-27-01

NTPT

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USA LIMITED EDITION

Inspired by the forces at play during high-level tennis matches, this tourbillon in the collection represents a new development in the creation of tourbillon watches for the world of sports. Designed with all the implemented experience gained during the construction of its predecessor, this new timekeeper represents another milestone in the history of horological development.

Main characteristics

The whole of its mechanical architecture, weighting just 3.8 grams, was skillfully designed and constructed in taut suspension on a network of shock absorbers anchored in the thickness of the NTPT case.

Limited edition exclusively available at Richard Mille Boutiques USA.

01
CALIBER RM 027-01
Manual winding tourbillon movement with hours and minutes.

WEIGHT OF THE WATCH WITHOUT STRAP 19 g

02
CALIBER RM 027-01
Manual winding tourbillon movement with hours and minutes.

POWER RESERVE 45 hours (±10%)

03
CALIBER RM 027-01
Manual winding tourbillon movement with hours and minutes.

WEIGHT OF THE MOVEMENT circa 3.5 g

04
CALIBER RM 027-01
Manual winding tourbillon movement with hours and minutes.

CALIBER RM 027-01 Manual winding tourbillon movement with hours and minutes.

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Approximate scale 1 : 1

Main characteristics

The whole of its mechanical architecture, weighting just 3.8 grams, was skillfully designed and constructed in taut suspension on a network of shock absorbers anchored in the thickness of the NTPT case.

Limited edition exclusively available at Richard Mille Boutiques USA.

CABLE-SUSPENSION MECHANISM

The baseplate is attached to the case by 4 braided steel cables, each with a diameter of just 0.35 mm. These cables are held taut by an ingenious mechanism of tensioners (located at 3 and 9 o’clock) and pulleys, which act like pylons positioned at the four corners of the movement. Designed to stay in suspension inside its case, the caliber can withstand accelerations of over 5,000 G.

CABLE-SUSPENSION MECHANISM

The baseplate is attached to the case by 4 braided steel cables, each with a diameter of just 0.35 mm. These cables are held taut by an ingenious mechanism of tensioners (located at 3 and 9 o’clock) and pulleys, which act like pylons positioned at the four corners of the movement. Designed to stay in suspension inside its case, the caliber can withstand accelerations of over 5,000 G.

NTPT CASE

An exclusive material with a unique appearance. Its remarkable surface displays extremely regular undulations, as NTPT carbon is composed of multiple layers of parallel filaments obtained by dividing carbon fibers. Heated to 120°C at a pressure of 6 bars, the NTPT is then ready to be processed on a CNC machine in Richard Mille’s Proart case factory. When compared to composite materials, whose exceptional physical properties are already well known, NTPT carbon improves the rate of occurrence of breaking stresses by 25% and of micro-cracks by 200%.

BASEPLATE IN GRADE 5 TITANIUM AND BRIDGES IN ALUMINUM-LITHIUM

The movement of the RM 50-27-01 is made of titanium and LITAL®, a lithium alloy containing aluminium, copper, magnesium and zirconium, with a density of 2.55. 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. The skeletonised baseplate and the bridges have been subjected to intensive and complete validation tests to optimise their resistance capacities.

BASEPLATE IN GRADE 5 TITANIUM AND BRIDGES IN ALUMINUM-LITHIUM

The movement of the RM 50-27-01 is made of titanium and LITAL®, a lithium alloy containing aluminium, copper, magnesium and zirconium, with a density of 2.55. 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. The skeletonised baseplate and the bridges have been subjected to intensive and complete validation tests to optimise their resistance capacities.

Characteristics

FAST ROTATING BARREL (6 hours per revolution instead of 7.5 hours)
This type of barrel has the following advantages:
- The phenomenon of periodic internal mainspring adhesion is significantly diminished and performance is thus enhanced, - It provides an excellent delta of the mainspring curve. The choice is determined by the ideal power-reserve/performance/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.

WINDING BARREL TEETH AND CENTRE-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.

OTHER FEATURES
- Movement dimensions: 27.20 mm x 21.72 mm
- Thickness: 5.04 mm

- Tourbillon diameter: 12.30 mm

- Balance diameter: 10.00 mm
- Number of jewels: 19

- Balance: in Glucydur, with 2 arms and 4 setting screws

- Moment of inertia: 11.50 mg.cm2, angle of lift 53°

- Frequency: 3 Hz (21,600 vph)

- Balance spring: in ELINVAR by Nivarox®

- Shock absorbers: Kif Elastor by KE 160 B28

- Barrel shafts: in nickel-free Chronifer (DIN x 46 Cr13 + S), with the following characteristics:
stainless, non-magnetic, tempered.

FINISHING

MOVEMENT
- Hand-polished bevelling
- Shot-blasted milled sections - Stretched upper surfaces

STEEL PARTS
- Shot-blasted surfaces
- Satin-brushed surfaces
- Hand-polished bevelling
- Long strokes
- Matt “brouillé” strokes
- Long strokes on the sides - Polished sinks

PROFILE-TURNING
- Lapped and polished ends - Burnished pivots

WHEELS
- Diamond-polished sinks
- Circular decorations on the front surfaces
- Rhodium-plating (before cutting the teeth)
- Minimal corrections are made to the wheels to preserve
their geometry and overall performance

DIMENSIONS
Dimensions: 45.98 mm x 38.90 mm x 10.05 mm.

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