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|  MIL-T-63533(AR)
3.4.1.5 Turret velocity and acceleration.
3.4.1.5.1 Azimuth slew rate. The turret azimuth slew rate
shall be a minimum of 60 degrees per second. Full azimuth
rotation of 220 degrees left or right shall be a maximum of 4.2
seconds. Operation of the turret at any slew rate shall be smooth
and not result in any oscillatory or erratic movements.
3.4.1.5.2 Elevation/depression slew rate. The turret
elevation and depression slew rate shall be a minimum of 50
degrees per second. The maximum travel (elevation to depression
or depression to elevation) of at least 65 degrees shall be
attained in a maximum of 1.8 seconds. Operation of the turret at
any slew rate shall be smooth and not result in any oscillatory or
erratic movement.
3.4.1.5.3 Azimuth velocity error. With the azimuth command
signal to the turret changing at a constant rate corresponding to
a gun movement of 5 degrees per second in azimuth, the position
error shall not exceed 2 milliradians.
3.4.1.5.4 Elevation velocity error. With the elevation
command signal to the turret changing at a constant rate
corresponding to gun movement of 5 degrees per second in
elevation, the position error shall not exceed 2 milliradians.
3.4.1.5.5 Slew acceleration. The UTS shall accelerate the
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turret at a minimum rate of 120 degrees/sec in any axis or
combination of axes. The acceleration shall be determined using a
step input to accelerate the turret from a standstill condition.
Operation of the turret at maximum slew rate shall not result in
any oscillatory or erratic movements.
3.4.1.5.6 Functional check-slew rate. During functional
check or boresighting, at the operator's discretion, a signal with
reference to ground shall be supplied to the turret. As long as
this signal is present, the turret/gun azimuth and elevation slew
rates shall be limited to a 6 + 2 degrees per second velocity.
This signal and slew rate shall have no adverse effect on boresight
accuracy.
3.4.1.6 Weapon stowage. The UTS shall provide the capability
for:
a. Fixed forward firing
b. Stow the gun during flight and during landing for
ground clearance
c. Stow the gun in the event of loss of system power at
speeds up to 100 knots.
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