Tourbillon 24 Secondes Incliné - third invention. Mastering speed
Inertia
The major difficulties encountered by the Inventor Watchmakers in developing the T24Si are partly linked to the high angular velocity, and to the inertia of the masses that have to be set into motion much faster than in a standard Tourbillon. Cutting-edge research into the weight of various components and the definition of a dedicated gear system successfully overcame these problems.Micro-aeronautics
Aluminium and its alloys feature a set of properties rendering them indispensable in many circumstances, and particularly in the fields of aeronautics and aerospace. These virtues include its low density, almost three times lower than steels; and its resistance to atmospheric corrosion ensured by the layer of Al2O3 oxide that forms on its surface.The particularly lightweight Avional alloy chosen by the Greubel Forsey laboratory is highly resistant to mechanical stresses, since its properties are as good as those of carbon steel. Greubel Forsey determined that the A1CuMg2 (Avional) alloy, featuring a mechanical resistance ranging from 200 N/mm2 in its soft state to over 470 N/mm2 in its most resistant state, would be ideal for making the four pillars of the T24Si cage.Titanium too
In addition to mechanical properties that are very similar to those of Avional, Titanium has even higher resistance and is ideal for making the upper and lower carriage bridges of the T24Si.Extreme difficulty
The task was even harder when it came to solving the geometry of the inclined gearing of its satellite pinion. A number of complex simulations backed by laboratory tests drew upon the entire range of EWT® resources.Representing a technical achievement that would have been impossible prior to the developments undertaken by Greubel Forsey for the Quadruple Tourbillon à Différentiel, a unique and original conception was selected to ensure the best efficiency according to the speed and the forces. For a given angle, numerous options were explored and various profiles were studied to ensure ideal meshing of the moving parts, while eliminating the risks of butting and optimising the efficiency of the overall system.
The major difficulties encountered by the Inventor Watchmakers in developing the T24Si are partly linked to the high angular velocity, and to the inertia of the masses that have to be set into motion much faster than in a standard Tourbillon. Cutting-edge research into the weight of various components and the definition of a dedicated gear system successfully overcame these problems.Micro-aeronautics
Aluminium and its alloys feature a set of properties rendering them indispensable in many circumstances, and particularly in the fields of aeronautics and aerospace. These virtues include its low density, almost three times lower than steels; and its resistance to atmospheric corrosion ensured by the layer of Al2O3 oxide that forms on its surface.The particularly lightweight Avional alloy chosen by the Greubel Forsey laboratory is highly resistant to mechanical stresses, since its properties are as good as those of carbon steel. Greubel Forsey determined that the A1CuMg2 (Avional) alloy, featuring a mechanical resistance ranging from 200 N/mm2 in its soft state to over 470 N/mm2 in its most resistant state, would be ideal for making the four pillars of the T24Si cage.Titanium too
In addition to mechanical properties that are very similar to those of Avional, Titanium has even higher resistance and is ideal for making the upper and lower carriage bridges of the T24Si.Extreme difficulty
The task was even harder when it came to solving the geometry of the inclined gearing of its satellite pinion. A number of complex simulations backed by laboratory tests drew upon the entire range of EWT® resources.Representing a technical achievement that would have been impossible prior to the developments undertaken by Greubel Forsey for the Quadruple Tourbillon à Différentiel, a unique and original conception was selected to ensure the best efficiency according to the speed and the forces. For a given angle, numerous options were explored and various profiles were studied to ensure ideal meshing of the moving parts, while eliminating the risks of butting and optimising the efficiency of the overall system.
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