AMPHIBIOUS WINCH TRACTOR

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600320092-4
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: August 30, 2011
• Sequence Number: 92
• Publication Date: June 15, 1950
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/08/31 :CIA-RDP80-00809A000600320092-4
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CENTRAL INTELLIGENCE >3.^ENCY REPOR~ 5OX1-HUM
CIASSIFICRTIGti ~: ,:?c.1_AEra'Pi:H1? ~,~~1d~~~~i~ 11~~
INFORMATIOPi FROM
FOREIGN DOCUNIEN'i'S OR RADIO F3i20AQCASTS CD t:0.
COUNTRY ussR
CIIRIFCT Eco*_+~mic -Tractor industry, timber industry
H;.W
PUBLISHED Monthly periodical
WHERE
PUBLISHED ussR
DATE
PUBLISHED Mar 1950
LANGUAGE
DATE OF
INFORMATION 195
DATE DIST. ~S Tun 1950
N0. OF PAGES 3
SLIPpLEMFNT TO
REPORT N0.
SOURCE
THIS IS UNEVALUATED INFORMATION
Mekhanizats~!,a trudoyemkikh i tyazhelykh rabot, No 3, 1950-
AMPHrBIOUS WINCH TRACTOR?
G~ D., Yakovlev
Gaud Tech Sci
Ao. amphibious winch tractor for use in breaking log dams on river shoals
has been designed by Prof N~ S~ Ve?tchinkin and Engineer A~ N. Medvedev of the
Central Scientific Research Institute of Water Timber-Transport and Hydrotechny.
An. experimental model of this tractor was produced in. .19+9 and tested an the
T~YZ~,a pt,.o,- tidr +go xnatTnttil~sospiav Trust.
The tractor has the following specifications:
Type of tractoro floating caterpillar.
Engineo ZIS??5 (gasoline)
Power^ ?~ horsepower at 2,200 revolutions per minute
Speed (kilometers per hour)
On band
1st gear
2,?
2d gear
S~?
3d gear
4th gear
120
_m
Rated speed on water 10 Lsi]~_kilometers per hour
Traction power of winch^ 3,000 kilograms
Speeu of towlinee ~~3 meter per second
Dimensions (~aillimetersi: long*h 5,030, tirldth 3,200, height at board
l,$00, submersion 1,30.'1
STATE
IRMY
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 Sanitized Copy Approved for Release 2011/08/31 :CIA-RDP80-00809A000600320092-4
~ r, r~oa: ,,, .f.
t~~~~i~~'~~+~~t!~
a .-~;?h ~YFw; 9;000 kilograms
Total weight when fuiiy riggeu, .. -
Specific pressure on groundo 0.4-kilogram per square centimeter
The amphibian has a instal waterproof body, a screw propeller,. and a 3-ton,
two-drum winch. The caterpillar track, w~nc~hE designedPwith arviewlto mechaniz-
from the transmission box Originally,
ing the labor-?consumirg operations of floating loose timber. In the ilesSe of
testing, i.t, proved equally effective in disentangling congested log p. ,
rolling logs into water, raising sunken timber, and transporting loads. Its
the table belowo
i
n
tions is shown
in these opera
productivity
Output (cubic meters.
Rv AmAhibious Tractor
B,~$and
Per riachine-
Per Man-
Da
Per Man-
Day
Labor Pro-
ductivity
Operation
S'iift
y
,_
Disentangling logs
up tc 2.5 meters
thick
ROliiii6 driC.d logs
1,00
240.0
100.0
?~4 times
from banY. into
water over a dis?-
tance of 150 meters
Rolling dried logs
on a chute into
ver a dis-
?2
702
gal
3.4
water o
tance of 200 meters
Disentangling logs
40
8.0
1.7
4.7
buried. in sand on
?
6
4.7 ~~
;t,o hank
36
o
1..."0
_"
Raising sunken tim-?
2
(
2.6
ber
2n
6.7
0
The amphibian has great mobility both on roadless land and on water, and
can reach places, otherwise inaccessible, to break up log congestion. The dif-
ferent operations are performed.bv tY,e traction winch which is mounted on the
amphibian. In log-dam operations, the winch is aided by a pulley block which is
mounted on the t?Jab~r, and the towline is drawn backwards.
To clear a river bank of dried or sunken timber, ordinary skidding lines
are fastened to a hook on the a~phibistn. The tractcubicnmetersaonaarchutelogs
of up to 3 cubic meters on the ground, and up to 5
The amphibian can descend into and get out of water st a bank incline of
30 percent" On land, it can move at a 40-degree angle. It can easily bridge
small trenches, ride over logs and small obstacles, and move among brush and
light timber>
At a de +h of 1.3 metiers, the amphibian moves along the bottom on its
caterpillarspJa,nd at greater depths by means of the propeller. Dw:ing tests,
ii- passed aver dozens of. kilometers of roadless land., water stre}cheS~it~wi;h-
ri~er bars. Although it, performed intensive work in umber floating,
stood a1i. shocks without damage 'to ary of its parts. Its flcatadility is ade-
quate and it ig stead.,y in fast waters.
CONF:LDENTIAL
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 Sanitized Copy Approved for Release 2011/08/31 :CIA-RDP80-00809A000600320092-4
?lie A**plibiar., has a nu?rher of ShpTfCOmj-Rgs, however. Its parts are uneven
in strengtho The track shoot, and rollers come i'rom different types of .ach!n?`
and, therefore, do not fit, During ~.;uc te~ti.ng, the shoes often slipped from
the rollers. The engine?s cooling system is inadequatea The engine is located
in the body and the air supply to the radiator is inadequate. The winch. drum
is placed a i.ittle high, which. causes the nose of the amphibian to rise during
the operation of the upper drum.
How_ver, in a mcre recent design, the VI,-3, based on standard ItP-12 tractor
part, and, units of other standard machines, these shortcomings have been elimi-
nated. Moreover, improvements have been. made in the structure of the body In
appearance, i.iia ML-'1 differs little from the VL-l, but the difference in parts
is considerable>
The 1.enEth oP the VL?-3 has been increased to 7.5 meters and the width re-
duced to 315 meters, which makes it more mane~.verable nn .lands The r_ew model
will have slog-shover, patterned ad'ter that of the light bulldozer. It will
be raised by a winch anal. will descend by its own weigkit. '17ia speed of the new
amphibian is expected to be 9-10 kilometers oa land acid 1.2 hilonw_tPrs on water.
bike the 1Q-i2 tractor, it will have five forward speeds and one reverse. TLe
levers contscllinfz the transmission of power to the driving wheels of the rear
axle, wi.n.ch, propeller, and auxiliary winch of the 1_a-shover will be located
in the driver?s cabin, which is taken from the iCC~~l?_ i;r.acter~
lwo models of the amphibian will be tested this year, and it will then be
decided whether it will go into series production
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Sanitized Copy Approved for Release 2011/08/31 :CIA-RDP80-00809A000600320092-4