“The YESLAM Aviator” is the first watch that can calculate the true airspeed of an airplane – with just one turn of the bezel.

With the up rise and integration of electronic and satellite navigation, the calculation of True airspeed became less and less necessary, but every pilot has and needs a watch. Based on the ICAO model of the International Standard Atmosphere (ISA), this watch will approximate the True airspeed for every combination of Indicated airspeed and flight level possible), within 5 knots. This margin is due to physical limitations of the size of the watch and human error.

The speed indicated by the instrumentation of a jet(I.A.S Indicated Air Speed) does not correspond to its real speed (True Air Speed). This measure is modified by the height and temperature at which travels the plane because they have a direct influence on the density of the air. This has naturally a significant incidence on the duration of a flight with all the evident consequences which it can have for organization and navigation.

Naturally today’s airplanes are all equipped with integrated flight computer which calculates exactly the true airspeed of an airplane. However, the electronic breakdowns of the instrumentation do not constitute an extremely rare phenomenon. Furthermore, it can also be useful to anticipate ‑ even before being on board – a schedule of flight. Here were two of the main reasons that drove to the development of a mechanism of bi directional rotating bezels allowing to perform in an instant this calculation. For that purpose, it was necessary to create a complex graduation, this one not being linear. The result is an international patent.

The Aviator hides the big complexity of its case. Aerospace industry materials such as titanium and ceramic were used. Dials are produced in a single block in the workshop of the brand according to a unique and exclusive process.

In the gold and Titanium versions, the open worked dial offers the view of disks and cogs of the mechanism of big date. The motive evokes the fans of a reactor and is decorated with “côtes de Genève” in helixes by the technicians of the brand for this model. The luxurious colour anthracite of these is obtained by treatment with electrolysis in black rhodium. The construction staged bezel, dial and movement give to The Aviator the balanced perspectives evoking the volume and the depth of the engines of jets.

Available in steel with vulcanized rubber “surmoulage” of the bezel or in titanium with pink or white gold 750, The Aviator is adorned with a thick bracelet drilled in calf closed by a folding clasp. According to the versions, The Aviator contains a mechanical automatic movement indicating the date, the day, the month and moon phases or the date as well as a second time zone “indispensable” to the travellers many of whom are pilots.

Technical details

• 250393450074 – Stainless steel
• 250393550074 – Titanium and rose gold 750
• 250393650074 – Titanium and white gold 750

Automatic + 2nd time zone and big date module
Frequency 4Hz
Power reserve 42H

• 44mm stainless steel/rubber
• 44mm titanium and rose gold 750
• 44mm titanium and white gold 750
Crystal Sapphire with anti reflective treatment
Water-resistance 50m (5ATM)

Engraving and opening through an exclusive machining process

Calf with folding clasp

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