XT SERIES Air-operated logo

XT SERIES - THE MOST POWERFUL AIR-OPERATED CLARK MASTS AVAILABLE - UP TO 150 Kg HEADLOADS, USING 203 MM (8") BASE TUBES

The XT Series are Clark's "HIGH POWER" telescopic masts with the capability of lifting 150 kilograms (special versions to 300 Kg can be supplied) to 10 metres or 36 kg to 18 metres (special versions to 30 metres & 50 Kg headload capability can be supplied).

As a member of Clark's Phase 2 series, they also have the un-guyed rigidity which has become increasingly necessary for today's equipment, particularly when microwave dish antennas are used. Electronic News Gathering, Line of Sight Links, small Radars, surveillance equipment of all kinds, portable phone cells, these are the applications in which XT masts perform best.

The 203 mm (8 inch) base section diameter makes the mast too large to set up manually. In almost all cases they are built into or onto vehicles or shelters in the vertical position. The top of each mast is provided with a substantial flange for the attachment of large headloads. Each mast section may be optionally factory fitted with locking (combined) collars for semi-permanent erection if desired, allowing the mast to remain extended without an air supply for long periods of time. For minimum retracted height the Plain (non-locking) Collar version may be ordered.

When the XT mast is fully extended a locking key system gives high torsional strength. To increase the stability of headloads with large wind area in high wind conditions, Guys may be attached to optional factory fitted Guy Collars. However the real advantage of the XT masts is their unguyed stability for work in average wind conditions.

A range of mounting and guying Accessories are available for the Clark Masts XT Series. Also a number of Air Supply options are available, including Hand Pumps, 12/24 Volt DC and 230/110 Volt AC Controller/Compressors, Petrol powered compressors and accessories to allow a vehicle's air source to be used.

All of these qualities give the XT mast series equal suitability for use in civilian and military applications, as evidenced by its choice for the advanced Verdi-2 Military Reconnaissance vehicle shown below.

For applications where a heavy duty mast and very rapid deployment is required, Clark Masts' 804 Heavy Duty Trailer Mast Series offer XT masts trailer mounted ready for fast turn around operations.


XT Mast in military service
XT Mast in service

 

XT SERIES, HEAVY DUTY MASTS FOR HEAVY DUTY TASKS - SUPPORTING MICROWAVE DISHES &
CELLULAR PHONE ANTENNAS

 

Technical Specifications on standard XT Series Masts
Model XT6 XT8 XT10 XT12 XT15 XT18 XT26
Plain (Non-locking) Collar
Mast Cat #.
15074 15073 15069 15070 15071 15072 18721
Retracted Height of Plain
Collar Mast (mm)
1420 1700 1975 2305 2805 3391 4876
Combined (Locking) Collar
Mast Cat #.
15055 15054 15050 15051 15052 15053 18715
Retracted Height of
Combined Collar Mast (mm)
1560 1840 2115 2445 2945 3531 5016
Extended Height (m) 6.0 8.0 10.0 12.0 15.0 18.0 26.0
Diameter of Top Section (mm) 114.3
(4.5")
114.3
(4.5")
114.3
(4.5")
114.3
(4.5")
114.3
(4.5")
114.3
(4.5")
114.3
(4.5")
Diameter of Base Section (mm) 203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
Number of Sections 8 8 8 8 8 8 8
Weight of Mast (Kg) 60 70 85 100 125 140 180
Maximum Vertical
Headload (Kg)
130 120 110 100 100 60 50
Time to extend mast with 50 Kg
headload using Model 200 (min)
1.75 2 2.5 3 4 5.5 7.0
Diameter of Headload
Mounting Flange (mm)
190 190 190 190 190 190 190
Mast Working
Air Pressure (Kg/cm3)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)


Technical Specifications on non-standard XT Series Masts
Model XT
SSSS4
XT
SSS5
XT
SSSS6
XT
10S
XT
14S
XT
18SS
XT
20S
XT
22SS
XT
26
XT
30S
Plain (Non-locking) Collar
Mast Cat #.
19054 18906 18975 18621 18251 18312 ---- ---- 18721 18722
Retracted Height of Plain
Collar Mast (mm)
1555 1720 2200 2012 2343 2979 ---- ---- 4876 4913
Combined (Locking) Collar
Mast Cat #.
18591 18591 18976 18620 18251 18306 19814 19889 18715 18716
Retracted Height of
Combined Collar Mast (mm)
1615 1800 2260 2172 2503 3059 3500 3550 5016 5073
Extended Height (m) 4.0 5.0 6.0 11.09 13.8 18.0 20.0 22.0 26.0 30.0
Diameter of Top Section (mm) 165.1
(6.5")
152.4
(6")
165.1
(6.5")
101.6
(4")
101.6
(4")
89.9
(3.5")
101.6
(4")
89.9
(3.5")
114.3
(4.5")
101.6
(4")
Diameter of Base Section (mm) 203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
203.2
(8")
Number of Sections 4 5 4 9 9 10 9 10 8 9
Maximum Vertical
Headload (Kg)
150         60 50   50 35
Diameter of Headload
Mounting Flange (mm)
190 190 190 190 190 190 190 190 190 190
Mast Working
Air Pressure (Kg/cm3)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)
1.4
(22 PSI)

For more information on delivery lead-times and pricing e-mail: GFS Electronics

The XT Series' heavy duty nature make these masts very suitable for
high stability un-guyed applications with large side area loads such as
microwave dish and cellular antennas exhibit.
XT Wind Loading Figures

 

BRIEF PHASE 2 MAST MECHANICAL
SPECIFICATIONS (INCLUDING XT)

Telescoping sections:
High strength Corrosion-resistant Aluminium Alloy.

Surface Finish:
Anodised natural colour or dyed.

General Finish:
Standard paint colour - white or NATO green. Other colours, including
desert sand, to order.

Maximum Operating Air Pressure:
1.7 bar (25 psi or 1.8 Kg/cm sq.).

Operating Temperature:
+55 degrees to -40 degrees C (dry).

Storage Temperature:
+65 degrees to -55 degrees C (dry).

Icing Risk:
Similar to any other mechanical device in conditions of temperature
change between +3 and -5 degrees C. Without precautions 5%. With
precautions <1%.

Air Leakage:
Expected pressure drop: Zero to 0.4 bar (0 to 6 psi).

Environmental Conditions:
Clark masts have been tested extensively in nature's test house for
Tropical Life, Salt Atmosphere, Dry Heat, Damp Heat, Driving Rain,
Shock, Vibration as well as High and Low Temperatures. Further
more, by following simple procedure there are no limitations for
transport in unpressurised aircraft.

Quality Assurance Standards:
AQAP 120 including ISO 9002.

 

A range of mounting options, as shown below, are available for all of Clark's masts
including the XT Series. For full details E-mail:
GFS Electronics
Mobile Mounting Arrangements


XT - the BIG mast

 

The photo at left is of an XT18, (an 18 metre mast with 60 Kg headload capability) and gives an ideal of the scale of the XT Series. Although they are normally vehicle mounted they may also be trailer or shelter mounted. Furthermore, longevity has always been a byword for Clark Masts. Many customers still operate masts 30-40 years old and are able to keep them in perfect order with readily available spares when necessary.

 

Next section, 802 Trailer Series Masts
Go to Phase 2 Series Information
Clark Mast General Accessories
Clark Mast Mounting and Guying Information
Equipment for Air Supply
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Web Article on "The History Of Clark Masts".





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Australian/Asia-Pacific distributors & service agents: GFS ELECTRONICS, PO Box 97, Mitcham, Victoria, 3132, Australia. 196 Jumping Creek Road, Wonga Park, Victoria, 3115, Australia. Phone +61 3 97222206 Fax +61 3 97222405

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This page was last updated 09/01/2010


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