Antenna Products Dual Shipboard Tilt Units

DUAL-LIGHTWEIGHT SHIPBOARD TILT UNIT OA-9243A (V) 4 S/R

Weight: 1,037 lbs
Height:
Raised 38.375 inches
Lowered 26.25 inches
Depth:
Vertical 22 inches
90° 35.375 inches
Tilt Angle Presets: 90°, 105°, 115°
Operating Speed
Powered 90° in 19.6 seconds
Manual 132 turns -90°
Operating Capacity
Static Load 1,000,000 in/lb
Dynamic Load 100,000 in/lb
Motor: 1 HP 440 VAC, Ø Type 1 Shipboard
Controller: Size 1 conforming to MIL-C-2212
Environmental Qualifications (MIL-E-16400)
Shock: MIL-S-901C
VIBRATION: MIL-STD-167-1
MIL-STD-801D: Temperature, Salt Fog, UV, Electrical, Enclosure, Ice, Dust, Humidity, & Inclination

Description

Description

DUAL-LIGHTWEIGHT SHIPBOARD TILT UNIT
OA-9243A (V) 4 S/R

The STU-4series shipboard tilt units are modular electromechanical systems for lowering and raising dual shipboard communication antennas. These units and the single antenna variants (STU-3 series) have over 90% commonality of components.

The STU-4LW uses a 1-horsepower brakemotor. The electrical controls are located in the pedestal for local operation, while an optional remote control will operate up to three units at a maximum of 1,200 feet away. A manually operated handcrank provides emergency control in the event of electrical failure. Tilt angles may be preset to any angle from vertical through 115°, and powered rotation from vertical to 90 seconds. All units may be tilted inboard to expedite antenna maintenance, removal or installation. Converting from dual to single antenna configuration is accomplished by installing another support arm. Provisions for mounting antenna tuners and couplers are available in rotating elements, permitting antenna feedwire lengths to be kept to a minimum. Compression pads are activated at vertical and horizontal limits to reduce shock and vibration loads from being transmitted to the rotating elements. Cam operated limit switches control the vertical and horizontal positioning. An overtravel limit switch removes all power to the drive motor in the event of limit switch failure. The units are designed to with stand loads of 1,000,000in/lb, and are normally used where green water loads are a major concern. Manual crank versions are also available.