Přejít na obsah

IWC Portuguese Hand-Wound Eight Days


kloubik

Doporučené příspěvky

  • Odpovědi 111
  • Vytvořeno
  • Poslední odpověď

Uživatelé s nejvíce příspěvky v tomto témátu

Uživatelé s nejvíce příspěvky v tomto témátu

Když už tu je to OT: v čem je výhoda excentrů? Jejich umístění na vnitřním obvodu setrvačky? Ale klasické vyvažovací šroubky můžou být taky zevnitř na 4 bodech, jako Damasko excentry ... třeba Omega to tak myslím má u Co-Axu.

Odkaz ke komentáři
Sdílet na ostatní stránky

to omega video je moc pekny.

 

jen me zaujalo spojeni "it will keep its shape forever" a "this allows Omega to offer a full 4 year warranty on every co-ax movmn...." :lol2:

 

ale jo, ve svete 24mesicnich zaruk je to fajn.....

Nikdo přece nebude vyrábět hodinky, které nepotřebují servis (ani kdyby to uměl :-)

Odkaz ke komentáři
Sdílet na ostatní stránky

Návštěvník YPO

Když už tu je to OT: v čem je výhoda excentrů? Jejich umístění na vnitřním obvodu setrvačky? Ale klasické vyvažovací šroubky můžou být taky zevnitř na 4 bodech, jako Damasko excentry ... třeba Omega to tak myslím má u Co-Axu.

Uspora mista ?

Odkaz ke komentáři
Sdílet na ostatní stránky

Návštěvník Alda

Když už tu je to OT: v čem je výhoda excentrů? Jejich umístění na vnitřním obvodu setrvačky? Ale klasické vyvažovací šroubky můžou být taky zevnitř na 4 bodech, jako Damasko excentry ... třeba Omega to tak myslím má u Co-Axu.

 

Vyhodou je udajne rychlost serizeni, aerodynamika. A misto, pokud jsou sroubky z vnejsi strany (souvidi s prumerem kola setrvacky - moznost vetsiho prumeru).

 

Uspora mista ?

Tak tak.

 

Jistě. Takhle se inovuje :D

 

nechces se jit sklebit jinam ?

Odkaz ke komentáři
Sdílet na ostatní stránky

K tomu nepokoji, ktery "zase az tak velka inovace neni", par citaci z webu. Ty vyhody jsou zde jasne popsany a vysvetleny, stejne tak rozsirenost. Vymysl to novy, pravda, neni ( patent Patek Philippe, 1949), ale bezna vybava hodinek na trhu to taky neni. Moderni technologie a materialy to casem zpristupni pro daleko vice vyrobcu, to je jasne. Stejne tak se casem rozsiri i kremikove vlasky a kremikova krokova kola, to je taky jasne. A to je dobre, profitovat bude hlavne majitel hodinek. IWC se orientuje na keramiku. Na tyhle male soucastky to nebude nejvhodnejsi material, tak tim resi zase jina slaba mista v natahu, nebo pouzdre. Taky parada. mozna, kdyby se to zkombinovalo, tak by to byl ideal.

 

"...THE ADJUSTABLE-MASS BALANCE

Even as the smooth Glucydur balance was gaining widespread favor, there was a concurrent development, which deserves mention. This is the adjustable balance with rotatable weights instead of screws. Only two are in production today, the Gyromax by Patek Philippe and the Microstella by Rolex. Instead of using a balance rim with threaded holes and screws, these two balances use weights that can be rotated on their mounting pins to move the mass of the weight towards the inside or outside of the balance. A Patek Gyromax balance is illustrated in Figure 6. On the Rolex balance weights are at the junction of the four balance arms and rim, and only four weights are used. The most important advantage of the rotatable weight is that a larger diameter balance can be used because the screws are not projecting off the perimeter taking up space in the movement. Additionally, the weights can be used to adjust the daily rate of the watch, thus eliminating the need for a conventional regulator. (The significance of this will be discussed in a later essay). In the Patek design, with the weights set down into the rim, aerodynamic drag and dust snags are both reduced. Judging by its literature on the Gyromax, Patek considers the aerodynamic issue significant.

The rim of the Gyromax balance, with weights, is shown in Figure 7. Because the slot in the weight reduces the mass of the weight at that point, rotation of the weight adjusts the distribution of mass around the balance rim. If a pair of opposing weights are adjusted equally, the daily rate of the watch can be adjusted. More mass towards the outside of the balance (slot towards the center of the balance) increases the effective diameter and slows the daily rate. Weights may also be rotated individually to adjust the poise of the balance.."

 
 
"..But perhaps the most famous aspect of a Patek movement is actually found on its balance wheel: the legendary Gyromax balance. Permit me a moment to discuss the theoretical advantages of this system. Today there are basically two major factions of engineering between how a watch ought to be adjusted. By far the most common solution today is the smooth balance/regulator crowd. This is the system used by Nomos, Seiko, ETA, Citizen, Christopher Ward, Breitling and many many more. I would wager that greater than 90% of mechanical watches today use this design. A small number of elite manufacturers use a competing design called a free sprung variable inertia balance. Examples of brands that use free sprung balances in their movements are Rolex, Omega, Patek, Damasko, Armin Strom, JLC and the higher end IWCs. Free sprung balances are almost exclusively in the domain of high end watche..."
 
"..The free sprung balance avoids these potential issues by doing away with the regulator altogether. Instead, the balance wheel itself can be adjusted. The only weakness of this system is difficulty in adjusting. The 5146G uses Patek's legendary Gyromax balance system. This uses tiny rotating weights that sit on top of the balance which have a heavy side and a light side. By rotating these weights, you can poise the balance and, by rotating two opposing weights together, adjust the rate as well. The Gyromax balance is generally considered to be the most sophisticated in the world and versions of it are used by only a few manufactures outside of Patek, namely Damasko and Audemars Piguet..."

 

"..Prior to the H35, the most affordable free sprung balance was available with one of the nicer Omegas or a Rolex, so this is quite an achievement for this price range..."

Odkaz ke komentáři
Sdílet na ostatní stránky

Bandi tady zminoval, nez se tu do toho vlozili lidove milice, zname problemy s presnosti starsiho kalibru. Mluvi se o tom prave v souvislosti s dvema perovnikama a vyssi frekvenci. Asi si toho Schaffhausensti byli vedomi a zamakali na tom. Novy osmidenni kalibr v rucne natahovanych Portugalech ma ale stale jeden velky perovnik, tak nevim. Mozna jim nakonec neslo o presnost, ale o misto na nastavbu rocniho kalendare. Nebo to v tom rucnim natahu diky absenci Pellatonu jde poresit jinym perem. Nevim.

 

 

 

" 52000 has dual mainsprings. There are three more likely reasons for this change--it may have allowed them to shrink the size of the movement (the 50000 is a very large diameter movement, although I don't know if the new movement is smaller, so this is purely speculative), they may have needed more energy to get the 7 day power reserve despite the increase in frequency, and most interestingly, this may be an attempt to address the well known accuracy concerns with the Portuguese Automatic movements by providing a more consistent delivery of energy to the escapement. This has been a frequent change in watchmaking recently, with Omega switching to dual mainsprings, and some companies, like Panerai, using two or even three mainsprings. 


With regard to the frequency, this is not particularly surprising to me. An increase in frequency may not only be an attempt to enhance stability, something needed in the 50000 line, but it was also forecast by the relatively new Portofino 8 Days hand wound movement, which was part of the 50000 family (59210), so it was already clear that IWC was toying with the idea of higher frequency, super long power reserve movements. However, that movement still uses a giant single barrel mainspring. I don't know if it's more accurate than the current, soon to be last-gen, Portuguese Automatic as a result of its increase in frequency..."

Odkaz ke komentáři
Sdílet na ostatní stránky

Pokud chcete odpovídat, musíte se přihlásit nebo si vytvořit účet.

Pouze registrovaní uživatelé mohou odpovídat

Vytvořit účet

Vytvořte si nový účet. Je to snadné!

Vytvořit nový účet

Přihlásit se

Máte již účet? Zde se přihlaste.

Přihlásit se

×
×
  • Vytvořit...