Audemars Piguet Royal Oak Concept GMT Tourbillon Instructions for use manual - page 12
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About the watch
twIN-barrEL SyStEM
calibres 2913 and 2930 have a power reserve of
237 hours (about 10 days). This endurance is achieved
by a large diameter, dual barrel system developed
by Audemars Piguet, with a blocking mechanism
guaranteeing optimum performances.
energy aT iTs besT
The fast-rotating, dual barrel system - with
revolutions limited to 19.75 made possible by using
an especially thin spring - guarantees a constant
force during the ten-day running time, hence
improved efficiency and chronometry. in reality
the two barrels fitted in parallel produce a power
reserve of twelve days. but an ingenious blocking
system - in the high (c-d, see graph below) and low
(A-b, see graph below) load zones - concentrates the
watch rate on the ten median running days, with
the most regular (b-c, see graph below) providing
optimum efficiency.
This specific feature
transmits the energy
far more gently and
regularly to the
wheels, thus ensuring
optimum efficiency
and therefore greater
rate accuracy and
reliability.
Tremendous operaTing accuracy
The blocking system
a parallel barrel system
• reduces pressure in the gearing
• the friction in the barrels is used to offset torque
variations
• increased running precision, a greater power
reserve and enhanced reliability.
1 jour
10 jours
1 jour
1 day
10 days
1 day
1 Tag
10 Tage
1 Tag
1 giorno
10 giorni
1 giorno
1 día
10 días
1 día
1 dia
10 dias
1 dia
1
день
10
дней
1
день
1
日
10
日
1
日
1
天
10
天
1
天
Position of the gears
3 days before stopping
Position of the gears
when stopped
Position of the gears when
fully wound
Parallel system (AP)
10 days
10 days
series system
5 days
= 10 days
= 10 days
5 days
ENGLISH