Using distinct materials for the hydraulic cylinder and control unit enables differential expansion, lower mass and bulk, and more modular aircraft servo controls.
Dog gears and a spring-biased slider lock the aircraft door piston assembly to hold partial positions despite hydraulic pressure loss.
Automatic wing actuator control uses differential linkage and valve blocking to keep aileron roll response available during hydraulic failure.
A single centrally sized bushing supports actuator shaft motion without tilting, cutting pneumatic actuator size, weight, and sealing complexity.
Roller disks, a Belleville spring, and needle thrust bearings split axial load paths to limit excess torque and avoid glazing over time.
Dynamic flap actuation with feedforward elevator control suppresses angle-of-attack resonance and enables faster, more precise lift response.
When eVTOL torque is limited, a mixer reprioritizes pitch, roll, and yaw commands to preserve stability and show remaining torque.
Error monitors compare commanded and actual stick positions to detect detent sensor faults and switch rotorcraft control modes safely.
A cylindrical tank with circumferential valves balances loads, cuts vibration and shielding weight, and improves flow and heat dispersion.
Variable friction and force-gradient cues in rotorcraft pilot controls restore limit awareness in fly-by-wire flight control.
A secondary-piston end stop valve closes at full retraction to curb parasitic hydraulic flow while preserving actuator function in low pump conditions.