ORBIT FR RCS Pylons User Manual
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RCS Pylons
Support structures designed for low RCS measurements
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Unique ogival
shape = extremely
low backscatter
A broad selection of pylons, combined with the choice of rotator types allows for a custom fi t
between pylon and DUT (Device under test). As a result of the unique ogival shape, front and
rear sharp edges, and structure surface accuracy, ORBIT/FR pylons demonstrate extremely low
backscatter, essential for RCS measurements.
Our pylons can be installed on a concrete base, adapter plate, ORBIT/FR positioner, linear slide,
elevator or any combination of the above.
SOLUTION FOR
• RCS measurements
• R&D applications
• Far-fi eld measurements
Key Features
• Ogive ratio: 1:4 standard, 1:6 and 1:7
available for most models
• Pylons for multiple applications
(RCS, Antenna measurement)
• Height: standard from 3 to 70 feet
(1 to 21 meters), or custom order
• Interchangeable tips (Optional)
• Three types of rotator heads: two AZ/EL
and one AZ only
• Load capacity: From 500 - 80,000 lbs.
• Sharp edges: 0.004 - 0.008 inch
• Surface fi nish – 63 microinch
• Optimal power-to volume ratio
• Position feedback readout: synchro or rotary
encoders
AZ/EL
"HAT" TYPE
Pylon structure
AZ/EL
LOW PROFILE
AZIMUTH
ONLY
System Confi guration
• Pylon structure: steel, aluminum or combination
of steel and aluminum
• Rotators: AZ/EL and AZ only
• Environment: indoor (standard), outdoor (optional)
• Mini model tower (optional)
• Storage fi xture
• Cover and edges protection kit
• Lifting device for installation
Storage fi xture Lifting device Edges protection kit
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ORBIT/FR offers three types of DUT rotation mechanisms
(heads): two Azimuth-over-Elevation (AZ/EL) rotators and
one Azimuth (AZ) - only rotator.
Rotators / AZIMUTH - OVER - ELEVATION (AZ/EL)
"HAT" type rotator with pylon
d1
d2
EDGE SHARPNESS
0.004-0.008 INCH
HEIGHT
d1
Rotator turntable
diameter (flange)
d2
h
t
A
B
C
D
E
OGIVE
w
Rotator base diameter
h
Rotator height
t
Flange thickness
A
Rotator (head)
B
AZ & EL drive and
control system
Tip
C
Through hole
D
for cables
Pylon structure
E
Support base
F
SURFACE FINISH
63 MICROINCH
60°
The “HAT” type pylon rotators are used for heavy
duty DUT measurement.
This unique hat-shaped rotator is positioned on top
of the pylon and provides a mounting interface on its
bottom fl ange to allow the rotator to fi t inside the DUT.
Fitting the rotator inside the DUT minimizes the
rotator’s interference in the measurement results.
Above a 20 ton DUT load, the mounting interface is on
top of the rotator.
l
OGIVE RATIO
w/l=1/4, 1/6, 1/7
F
Pylon with "HAT" type rotator
3
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