UH-60 IPC SYSTEMS. MIXING UNIT. MIXING UNIT. TLO: To reinforce basic system fundamentals for the UH-60 IPC. MECHANICAL MIXING UNIT. The mixing unit provides mechanical control mixing functions which minimize inherent control coupling and reduce pilot workload. MECHANICAL MIXING UNIT.
UH-60 IPC SYSTEMS
TLO: To reinforce basic system fundamentals
for the UH-60 IPC.
The mixing unit provides mechanical control
mixing functions which minimize inherent
control coupling and reduce pilot workload.
Compensates for rotor downwash on the
stabilator. The mixing unit compensates
for this increased downwash by tilting
the rotor disk forward, or decreased
down wash by tilting the rotor disk aft.
Compensates for a right rolling moment
(translating tendency). It tilts the rotor
disk to the left with increased collective
and reduces left tilt with decreased collective.
Compensates for torque effect. An increase
in collective causes and increase in tail rotor
pitch, while a reduction in collective results
in decreased tail rotor pitch.
Compensates for the lift components of the canted
tail rotor. With increased pitch in the tail rotor (left
pedal), the main rotor disk is tilted aft, and with
reduced tail rotor pitch (right pedal), the main rotor
disk is tilted forward.
Collective to airspeed to yaw mixing helps compensate
for the torque effect in addition to collective to yaw
mechanical mixing by increasing or decreasing tail
rotor pitch by the use of the yaw trim actuator. This is
a function of the SAS/FPS computer.
Collective to airspeed to yaw varies its inputs to the tail
rotor based on both collective position and airspeed signals.
From 0-40 knots, electronic coupling is at its maximum
input. As airspeed increases above 40 knots, the tail rotor
and the cambered vertical fairing become more efficient.
Electronic coupling decreases the amount of tail rotor pitch
programmed until 100 knots, where no electronic coupling is