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, le il y a 14 années et 1 mois.
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Enfin moi, après 15 ans de bon et loyaux services en tant que mécanicien avion (Mir IV, Mir IIIB et Mir F1 CT) je suis tombé amoureux……… des plongeuses
et comme je suis lié à vie avec l’ aéronautique je me suis décidé pour une superocean, tout cela pour dire qu’une montre mécanique est un bijoux et que seule celle qui te fera vraiment craquer sera le bonne 
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Mon Chat ne fout rien à la maison……. Que faire ????Une X33 2°génération
ou une Speedmaster Z-33 si tu as un poignet de bûcheron.
http://www.omegawatches.com/fr/gents/product-presentations/spacemaster-z33
achètes la navitimer en premier! son prix augmente tous les 6 mois et son prix actuel est déjà élevé.
Le tarif de la speed est nettement plus abordable maintenant, donc tu auras le temps « d’économiser pr la speed » dans un deuxième temps.
merci, je dois dire que ma passion pour la conquête spatiale me fera craquer pour la speedmaster pro
La cosmonaute ! Si l’affichage de l’heure sur 24H ne te dérange pas. En plus elle existe avec un calibre 02 (70h de réserve de marche).
http://www.breitling.com/fr/navitimer-cosmonaute/Question pour les spécialistes : une montre mécanique, ça supporte combien de ‘G’ en ‘continu’, ex: virage serré sur un avion de chasse ? Il n’y a pas un seuil où le balancier risque de frotter ?
- dems a écrit:
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- BuckD. a écrit:
- La speedmaster peut prendre jusqu’à 40 G
merci pour la réponse. Ca devrait aller alors!
In 1962, NASA decided to equip the astronauts of its future Gemini programm with a highly accurate, legible, resistant and reliable wrist chronograph.
Donald K. Slayton, head of the flight Crew Operations , took action to select the chronographs :
For the purpose of comparison tests, NASA purchased chronographs different brands from Corrigan’s, a large retailer in Houston, Texas the following watches where purchased : Elgin, Benrus, Hamilton, Mido, Piccard, Omega, Bulova, Rolex, Longine and Gruen. Of theses only 3 where selected for the comparative evaluation testing :
Longines, Omega and Rolex (Omega movement : Omega 321 , Rolex movement : Valjoux 72 , Longines : Longines 13 ZN)
1965 first qualification program :
Model tested : probably 105.012 no documents found for the moment to firmly state this , but for sure a Speedmaster equiped with Omega 321 caliber
High temperature: 48 hours at 71º C followed by 30 minutes at 93º C. This under a pressure of 0,35atm and relative humidity not over 15%.
Low temperature: Four hours at -18º C.
Temperature-pressure: 0,000001atm and temperature raised to 71º C. Temperature then lowered to -18º C in 45 minutes and again raised to 71º C in 45 minutes. This cycle was repeated fifteen times.
Relative humidity: 240 hours in relatuve humidity of at least 95% and at temperatures varying between 20º C and 71º C. The steam had a pH value of between 6,5 and 7,5.
Oxygen atmosphere: Exposure to 100% oxygen atmosphere at a pressure of 0,35atm and a temperature of 71º C for 48 hours.
Shock: Six 11 millisecond shocks of 40g each in six different directions.
Acceleration: Linear acceleration from 1g to 7,25g within 333 seconds.
Decompression: 90 minutes in a vaccum of 0 10-6 atm and a temperature of 71º C and 30 minutes in the same vaccum but at a temperature of 93ºC.
High pressure: Exposure to 1,6atm for one hour.
Vibration: Three cycles of 30 minutes (lateral, horizontal and vertical), the frequency varying from 5 to 2000cps and back to 5cps in 15 minutes. Average acceleration per impulse 8,8g.
Acoustic noise: 130dB over a frequency range from 40 to 10000Hz for 30 minutes
Results of the tests :
Omega Speedmaster : gained 21 minutes during decompression test and lost 15 minutes during the acceleration test , the luminescence of the dial was lost during the test
Rolex Daytona : stopped running on two occasions during the relative humidity test and during the high pressure test when the sweep second hand wraped and press against the other hands
Longine Wittnauer : Crystal warped and disengaged during the high pressure test , same fault occured during the decompression test
Final conclusion : the Omega chronograph performmed satisfactorily
In 1965, NASA chose the Omega Speedmaster Professional as the official chronograph for the space program.
With the first Gemini flight (GT3) with astronauts Grissom and Young, the Speedmaster Professional became part of the standard equipment issued to the astronauts. The watch was worn on the outside of the pressure suit with the use of a large black velcro band.
The Speedmaster was worn during the first walk in space by an American, Edward White, in 1965. Two speedmasters were worn by each Gemini astronaut one set on mission time , the other one on GMT or Huston time.
- BuckD. a écrit:
- Shock: Six 11 millisecond shocks of 40g each in six different directions.
Acceleration: Linear acceleration from 1g to 7,25g within 333 seconds.
…
Ca m’étonnait aussi un peu : 40G c’est pour un choc, 8G pour une vibration, en accelération on est plutôt à 7G.
Ca suffit, à moins d’être un acrobate aérien ou un pilote de chasse…!
erature: 48 hours at 71°C followed by 30 minutes at 93°C
Low temperature: Four hours at -18°C
Temperature cycling in near-vacuum: Fifteen cycles of heating to 71°C for 45 minutes, followed by cooling to -18°C for 45 minutes at 10−6 atm
Humidity: 250 hours at temperatures between 20°C and 71°C at relative humidity of 95%
Oxygen environment: 100% oxygen at 0.35 atm and 71°C for 48 hours
Shock: Six 11ms 40 G shocks from different directions
Linear acceleration: from 1 to 7.25G within 333 seconds
Low pressure: 90 minutes at 10−6 atm at 71°C followed by 30 minutes at 93°C
High pressure: 1.6 atm for one hour
Vibration: three cycles of 30 minutes vibration varying from 5 to 2000 Hz with minimum 8.8G impulse
Acoustic noise: 30 minutes at 130db from 40 to 10,000 Hzsur le test ci-dessus seul la speedmaster ne s’est pas arrêter et continuait de fonctionner.
La navytimer est-elle étanche?- BuckD. a écrit:
- sur le test ci-dessus seul la speedmaster ne s’est pas arrêter et continuait de fonctionner.
La navytimer est-elle étanche?
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