Spacegraf Zero-G 39mm YMHF2019-GG Stainless Steel Case Blue Dial Epson YM90A Quartz Caliber
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|Thickness||13mm thickness, 19mm lug width|
|Bezel||Black tachymeter bezel|
|Case Material||316L Stainless steel Case|
|Dial||Textured blue matt dial Minutes/seconds track with 2G zones in white and Zero-G zone in red|
|Strap||Canvas (fabric) with leather lining with PVD coated pin buckle|
|Crystal||Domed Mineral Crystal|
|Movement||Epson YM90A Caliber Frequency: 32,768Hz Antimagnetism greater than 1600 A / m (DC magnetic field)|
|Function||Hour, minute, 1/5 second chronograph Chronograph minute counter at 6 o'clock|
|Water Resistance||10 BAR / 330 Feet / 100 m|
- Designed in collaboration with France’s Space Agency (CNES) this new Spacegraf commemorates the 30th anniversary of French simulated gravity flights
- YEMA's latest French moonwatch designed in collaboration with France’s Space Agency commemorate the 30th anniversary of French parabolic flights (simulated gravity). Designed to meet the strict requirements of ZERO-G flights' crew members, this new Spacegraf combines perfect readability at all times with high precision. The chronograph feature allows precise reading of G periods during parabolic flights and easiness-of-use when in weightlessness.
- Precise time measurement and high accuracy (to the nearest second) is a highly sensitive matter for astronauts. France's Space Agency has privileged a quartz movement over a mechanical one so as to ensure high precision at all times and under all extreme conditions of parabolic flights. During flight tests, the Epson YM90 movement managed to meet all these requirements by perfectly timing zero G periods (chronograph function in combination with red highlighted seconds markers) and parabolic flight stages (minute chronograph feature at 6 o’clock).
Parabolic flights (or zero G flights) are a gateway to weightlessness. They are dedicated to scientific experiments and to space equipment technological testing. From a flight attitude at 24,000 feet, the ZERO-G aircraft increases attitude. During this phase, the weight is 1.8 times greater than normal weight for 22 seconds. Then the aircraft trajectory is piloted to follow a kind of parabola and the power thrust is reduced. The vertical load factor goes from 1.8G to zero gravity for about 22 seconds. The first pilot adjusts the control stick tilt to maintain the vertical load factor at zero, while the second pilot maintains the roll angle at zero, and the mechanic adjusts the thrust of the engines to cancel the longitudinal load factor. An exit phase at 1.8G symmetrical with the entry phase, is then performed on the descending part of the parabola to return the aircraft to a stabilized altitude level within 22 seconds.
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