CLARK MASTS FOR MILITARY USERS
CLARK MAST CLARK MASTS FOR MILITARY USERS
Type 73
MECHANICALLY EXTENDED
VERTICALLY ERECTED SECTIONAL FIELD MAST KITS UP 30 METRES (98 Feet)
For over 40 years Type 73 masts have been the communications backbone of many armies. The main features, such as the aluminium alloy mast sections, the winch system which controls the guys during errection, the 3-legged erection gear and the mast lifting hoist which made the first Type 73 mast unique, are still there today. Whilst the basic system has not changed, there have been many detail improvements. However, with each improvement the matter of interchangeability has not been neglected.
Type 73 is
a mast system which operators rapidly understand and can erect
with confidence, even in very adverse weather conditions. Type 73
masts are available as field deployable kits with extended
heights of 10, 13, 16, 18, 21, 30 metres and vertical headload
capabilities from 50 to 75 Kg having a horizontal component from
70 to 150 Kg.
| Standard Type 73 Kit
Components (Example here shows 10 Metre P/N 18130 mast) |
Item |
Part |
Title | Qty |
 |
1 | 18201 | Mast Guide Box | 1 |
| 2 | 10772 | Step Assembly | 4 | |
| 3 | 18020 | Leg Assembly | 3 | |
| 4 | 18114 | Foot Assembly | 3 | |
| 5 | 7600 | Hoist | 1 | |
| 6 | 13973 | Hoist Support Bar | 1 | |
| 7 | 5246 | Lifting Block | 1 | |
| 8 | 5426 | Bubble Level | 1 | |
| 9 | 5373 | Foot Adjustment Brace |
1 | |
| 10 | 18021 | Guy Winch Kit (Leg Mounted) |
1 | |
| 11 | 18037 | Picket | 3 | |
| 12 | 18039 | Picket Clamp | 3 | |
| 13 | 18034 | Picket Driving Cap | 1 | |
| 14 | 18033 | Picket Extractor | 1 | |
| 15 | 6409 | Leg Spike | 1 | |
| 16 | 18022 | Guy Collar Set | 1 | |
| 17 | 5231 | Mast Section | 7 | |
| 18 | 14522 | Mast Section Carrier (3 Section) |
1 | |
| 19 | 14523 | Mast Section Carrier (4 Section) |
1 | |
| 20 | 18150 | Guy Radius Line | 1 | |
| 21 | 18025 | Winch Bag | 1 | |
| 22 | 18026 | Hoist Bag | 1 | |
| 23 | 18027 | Equipment Bag | 1 | |
| 24 | 18031 | Accessory Bag | 1 | |
| 25 | 18035 | Leg Bag | 1 | |
| 26 | 18028 | Picket Bag | 1 | |
| 27 | B12173 | Hammer | 1 | |
|
The number of mast sections, mast section carriers, pickets, guy collars, spikes etc varies according to the actual height of the mast to be erected. The part numbers shown in the table above include all items needed for a 10 metre field mast kit, Part Number 18130 |
|||
| Packed 73 Mast Kit ready for transporting | ||||
BRIEF DESCRIPTION OF THE SYSTEM
1. Three adjustable legs are
attached to a central guide tube.
2. Tube sections are fed into the central guide tube and one by one lifted using a special hoist, thus building up the mast.
3. Guys are attached at levels determined by the maximum mast height and are held in controlled tension by the mechanical winch unit.
4. After erection the mast may be rotated through 360 degrees.
5. Retraction is the above proceedure reversed.
PICKETS
Type 73 mast kits are now supplied with a picket equally suited for hard or soft ground. Also supplied is a device for easy picket extraction.
FEATURES
| 1. Panclimatic |
| 2. Maximum component weight is less than 20 kilograms |
| 3. Capability: 8 to 30 metres, headload up to 75 kilograms |
4. Erection example 20 metres: three persons with typical antenna, 45 minutes |
73
SERIES BRIEF SPECIFICATION
| Mast Section Heat-treated light alloy to BS14171, 6082TF. Specially drawn and machined. Anodised to DEF STAN 03-25. Sections can be dyed green, gold or desert sand. |
| Aluminium Alloys Castings in LM6 alloy to BS 1490, gravity diecast. |
| Steel Where surface hardness is required, medium carbon steel to EN8D, HF induction hardened. Elsewhere EN 1a. |
| Finishes Zinc plating and passivation to DEF STAN 03-20. Paint finishes to Military Green or other colours on demand. |
| Bag Materials Nylon decontaminable cloth to UK/SC3501 with approved straps and buckles. Stiffening is by means of low density polyethelene removable plates inside the bag. |
| Guy Cable Standard 6/9 galvanised steel to BS 3530. Stainless or nylon covered to ISO 2232 or Kevlar on demand. |
| Performance of a 20 Metre Mast, P/N 18134 | |
| Number of operators required | 1 per 10 metres of height |
| Time to erect with 2 operators | 40 Minutes |
| Time to lower & store mast | 30 Minutes |
| Maximum Vertical Headload | 60 Kg |
| Maximum Horizontal Headload | 100 Kg |
TYPE
73 Optional Kit Accessories
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