Editing Eclipse Geo (section)

== Operating systems ==

=== Original Geo drivetrain ===

The original Geo used an electronically controlled spool-valve mechanism.

Unlike the Ego's ram-driven poppet-valve arrangement, the Geo used a moving bolt assembly to control the release of compressed air.

Subsequent early Geo models incorporated revisions to the drivetrain, electronic controls and solenoid operation.

=== IV Core ===

The IV Core was introduced through the limited-edition Geo GSL and subsequently used in the Geo 3.5, CS1 and Geo 4.

The system incorporated breech-sensing technology intended to improve air efficiency.

According to Planet Eclipse, the drivetrain used the pressure pulse behind a fired paintball to help close the main valve before the firing chamber was completely exhausted.

This reduced the amount of compressed air released after it could no longer contribute significantly to the paintball's velocity.[2][3]

=== GR drivetrain ===

The Geo R5 introduced the GR drivetrain in 2024.

The new system retained breech-sensing principles but incorporated revised valve geometry, internal air volumes and operating characteristics.

Planet Eclipse identified improved efficiency, reduced operating pressure and easier maintenance among its design objectives.

The GR drivetrain should be distinguished from the IV Core used in preceding Geo models and the OP-R Core used in the [[Eclipse Gtek]] 180R.[3]