THE SOVIET ESH-1 WALKING DRAG-LINE EXCAVATOR

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600330348-9
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: August 26, 2011
• Sequence Number: 348
• Publication Date: August 1, 1950
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/08/31: CIA-RDP80-00809A000600330348-9
CLASSIFICATION CONFIDENTIAEUNF'QE jT AL
CENTRAL INTELLIGENCE AGENCY REPORT
INFORMATION FROM
FOREIGN DOCUMENTS OR RADIO BROADCASTS CD NO.
COUNTRY USSR
SUBJECT Economic - Coal
HOW
PUBLISHED Monthly periodical
WHERE
PUBLISHED Moscow
DATE
PUBLISHED Jan 1950
LANGUAGE Russian
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II AND II. A/ ArIrOID, ITS TIAII/rl/pr OI 101 I101IA710r ANY A..
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NIIITIDD IT TLAS. I IITIODUCTION 0 TNII 1005 II P5001 ITIO. IS ~IO?
DATE OF
INFORMATION 1950
DATE DIST. / A'uD.~950
SUPPLEMENT TO
REPORT NO.
THIS IS UNEVALUATED INFORMATION
TI SOVIET ESh-1 WALKING DRAG-LINE EXCAVATOR
The ESh-1 walking dragline excavator was developed to facilitate open-pit
mining by the nontransport jxcavation and removal of overburden by excavator]
system of mining. With open-pit mines reaching depths of over 100 meters, the
removal of overburden has become an especially important and labor-consuming
process, requiring the most efficient equipment and methods of removal. Labor
productivity by the nontransport system of mining is 3-6 times higher than by
the trans ort system joverbui-den conveyed from the pit by railroad7.and it
costs 2-2k times less to remove a cubic meter of overburden.
The first ESh-1 excavator was developed by the Karpinskiy Machine-Build-
ing Plant and the State Institute for Planning Coal Machinery. At present, it
is in series production. No single plant of the Main Administration of Coal
Machine Building was equipped to handle such a machine, so it was manufactured
through the cooperation of the administration's various plants. The excavator
is of welded construction, making it light and simple to produce.
The machine is controlled by a combination pneumatic-electrical system.
Acceleration and brake action are automatically regulated. The traction, lift-
ing drums, and propelling mechanism are engaged by compressed air by means of
a special electromaetic valve. The excavator can operate on 6,000 volts with
a 6,000400 transformer, or 380 volts without this transformer.
The excavator's lightness and walking mechanism permit operation on swampy
ground, loose ground, and open pits. Moreover, it may be used for other excava-
tion work, such as digging canals and irrigation systems.
Unlike US excavators which use a similar but expensive direct-current elec-
tric drive, the ESh-l uses an original alternating current drive proposed by
construction engineers of the "Elektroprivod" Trust of the Ministry of Electri-
cal Industry. This electric drive cuts the cost of electrical equipment in
half, simplifies operation, reduces electrical consumption, and makes - operations
UIBENTIA1
Sanitized Copy Approved for Release 2011/08/31: CIA-RDP80-00809A000600330348-9
SOURCE Ugol' No 1, 1950.
 Sanitized Copy Approved for Release 2011/08/31: CIA-RDP80-00809A000600330348-9
The electrodynamic brake action on the ESh-l works very satisfactorily
and uses 40 times less electricity than braking by counterflow.
Data of a year's operation of the ESh-l shows that it uses 12 percent
less electricity than US excavators of the same type.
Technical data of the ESh-l excavator follows:
Dragline
Full swing; shovel capacity
Length of boom
Operating range when boom is at 35-degree angle
Maximum radius, unloading
34.0 meters
11
height, unloading
17.0
Velocity
Length of step (theoretical)
Maximum angle of grade in moving
Pressure on ground
0.3 km/hr
1.83 meters
15 degrees
Base
Shoe
Dimensions of machine in working condition
Length
0.37 kg/sq cm
47.0 meters
Height
24.0
Width
10.0
Total weight
Power
Motor capacity
163.0 tons
Alternating current
31.3 kw
C~~~~~d~ SAL
We-
Sanitized Copy Approved for Release 2011/08/31 CIA-RDP80-00809A000600330348-9