Firing drives the barrel backward on rails; a hydraulic buffer
forces oil through a narrow orifice to dissipate most of the recoil
energy as heat, while a spring (the recuperator) stores the rest
and slowly pushes the barrel back to battery.
F_hydraulic ∝ v² / orifice_area
F_spring = k · x
m·a = F_recoil − F_hydraulic − F_spring
- Hydraulic orifice size — smaller orifices resist oil flow more, absorbing energy faster but spiking peak force.
- Recuperator spring stiffness — how strongly the barrel is pushed back into firing position afterward.
- Charge — the recoil energy delivered by firing; a bigger charge needs proportionally more damping.
Without a recoil brake the entire firing impulse would be
transmitted straight into the carriage/mount — real guns from
WWI-era artillery to modern howitzers rely on exactly this
hydraulic-orifice damping to keep the mount from being torn apart.