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HPA Polarstar Kythera SA AK Mechanical Engine V3 by Polarstar 
HPA Polarstar Kythera SA AK Mechanical Engine V3 by Polarstar
Altri prodotti Polarstar HPA
Prezzo Iva Inclusa: 269.00EUR
SDA: 8.50EUR
Ritiro in Sede: 0.00EUR
PostaRaccomandata: 7.00EUR
GLS: 8.00EUR
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The Kythera has been the most eagerly anticipated products
from PolarStar in the past decade.
This HPA system is a radical departure from all previous
systems that PolarStar has produced since the Kythera does
not use a battery, an FCU or any type of electronics.
The Kythera is completely mechanical.
This means you never have to worry about charging batteries
or work with delicate electronics. It also means that the system
is completely waterproof.
The name "Kythera" (ky-the-ra) was derived from the Antikythera
Mechanism which is a mysterious device that was discovered
by sponge divers off the coast of the Greek island Antikyther.
The mechanism was so advanced in design that scientists have
been studying it for decades to discover its purpose.
The machine dates from around the end of the 2nd century
B.C. and is the most sophisticated mechanism known from
the ancient world.
Nothing as complex is known for the next thousand years.
The Antikythera Mechanism is now understood to be dedicated
to astronomical phenomena and operates as a complex
mechanical "computer" which tracks the cycles of the
Solar System.
For this reason we used the name Kythera for the valve
mechanism at the core of a new line of PolarStar mechanical
HPA systems.
Although it contains very few parts and is easy to install and
maintain, the system incorporates a very intelligent design and
is unlike anything else on the market.
The system was designed as a mechanical system from the
ground up and uses a realistic trigger mechanism which can be
applied to single-shot, semi-automatic and fully-automatic systems.
The first of these systems is Kythera SA (Semi-Automatic), the
semi-auto-only variant for use in AEG gearboxes. 
So, what makes the Kythera so unique?
What sets this system apart from other mechanical systems is the
design of its trigger.
The trigger mechanism is designed to replicate the function,
weight and feel of a real single-action firearm trigger.
It feels real because it is real.
The hardened alloy steel sears catch and release the stainless
steel spool valve in the same way the sears of a real firearm catch
and release the hammer or striker.
This gives the Kythera trigger the distinct break and reset you
would expect to feel when firing a real single action firearm.
The trigger mechanism in the Kythera SA is also adjustable,
allowing the user to fine tune the weight and over travel.
Additionally, the internal firing valve is balanced and the only
force applied during firing is the main spring.
This means the function and feel of the trigger is independent of
input pressure and velocity.
The design of the Kythera SA completes a shot cycle on the
trigger pull.
This gives you the proven closed bolt performance of the Fusion
Engine and F2 in a completely mechanical, waterproof system
with a realistic trigger.
It does not require the trigger to be released before the nozzle
chambers the next round and the firing volume is refilled.
This occurs automatically and consistently every shot, with
adjustable nozzle dwell and return speed.
As the system resets and recharges immediately after firing,
it is ready to fire again before the trigger has been released.
This means the system can cycle very quickly for faster follow
up shots and a lower potential for double feeding.
The valve design of the Kythera operates without the need for
air to control the opening or closing of the valve.
Without a pilot valve, 100% of the air going into the system is
fired through the nozzle allowing it to operate very efficiently.
In addition to being extremely efficient, the system is also
extremely consistent.
The valve is released at the same point every shot with the
same force applied, regardless of trigger input.
The steel cord visible at the back of the system is attached to
a cocking mechanism for the internal spool valve.  
Although the system automatically cocks the spool valve when
the system is pressurized, since the Kythera uses a balanced
valve, it is possible in certain situations that the valve could stall
and needs to be manually cocked.
This typically only happens if the system is run completely out
of air so that the pressure drops below the operating range of
the system.
The cord is designed to be either routed through the grip of the
rifle for easy access or even possibly attached in some fashion
to the charging handle.
The Kythera SA system installs into a standard gearbox as a
single assembly and typically does not require any modification
to the gearbox.
There are no separate parts to install and the only parts needing
to be retained from the gearbox is the trigger, spring guide,
selector and safety components.
The Kythera has a wide operating pressure range of 60psi to
180psi which allows you to fine tune the velocity of the system
and tailor for different requirements and applications.
Within this pressure range we observed a muzzle velocity of
270 - 500fps w/ .20g using a 6.05x380mm barrel.
This lets a single Kythera be used in any role ranging from CQB
to Sniper by mainly just adjusting the input pressure from your air rig.
Designed from the ground up as a high performance mechanical
HPA system, not a modification of a solenoid operated design.
Patent pending valve mechanism provides excellent efficiency and
consistent velocity combined with a realistic trigger pull and reset.
Completes a full shot cycle on the trigger pull alone which
translates into consistent nozzle movement and rapid follow up
Adjustable trigger.
Adjustments include: Weight, length of pull and over travel.
Adjustable nozzle dwell/return speed.
Wide operating pressure range of 60 to 180psi.
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