What does the BAK-12 hydraulic system use to maintain brake pressure in the battery position?

The BAK-12 hydraulic system utilizes static pressure to maintain brake pressure in the battery position. Static pressure refers to the pressure exerted by a fluid at rest, which in this hydraulic system is essential for ensuring that the brakes remain engaged when the aircraft is stationary. This pressure is generated and maintained in the system without the need for dynamic movement, making it effectively reliable for holding brake pressure in various situations.

The choice of static pressure is particularly relevant for braking systems, as they require a consistent and stable pressure to ensure safety and functionality while the aircraft is on the ground. Unlike dynamic pressure, which can fluctuate due to movement or changes in fluid flow, static pressure offers the steadiness necessary for effective brake engagement and holds the hydraulic fluid in place to maintain that pressure reliably.