Part 1: From the Minds of Engineers ...
In the opening days of the Cold War, the US Army
and American manufacturing industrial base were committed to the
development and fielding of a tracked infantry carrier. While
consideration was given to design concepts that would also make it a
"fighting vehicle", these were shunted aside and the simple design of
a steel enclosed, tracked box to carry a squad came to dominate
doctrine and design for over thirty years. But what of the scouts?
Just how much saber and how much stealth was
the appropriate mix for the scout units of both divisional cavalry
squadrons and the regiments? Deciding this would lead to the
appropriate evolution of doctrine, training and equipment. This is a
question that has been under intense study and debate since the end of
World War II and continues to this day as the Army reconfigures to
face the tasks of combat operations in the new century. Interestingly,
the major war experiences of the Army during this post WW II period,
Korea and later Vietnam, often clouded the discussion rather than help
provide a clear evolutionary path.
The US Army scouts of the reconnaissance
battalions from WW II through the early 1960s primarily operated out
of the ¼ utility wheeled vehicle. Other vehicles developed, the
M3A1 Scout Car and the heavier
M8 Scout also saw considerable service but the scouts who first
buzzed through the Rhoen area of Germany in April 1945, were in jeeps.
In the immediate post war period, the M3 was soon washed out of the
inventory, the M8 saw considerable service with Constabulary units and
remained in inventory well into the 1960s but was relegated to MP and
then Reserve and National Guard roles.
In an interesting sidelight, the German
military of WW II fielded a variety of very capable scout vehicles
running from light tanks to high mobility-lightly armor four wheel
variants to eight wheeled, fast tank killers. In the immediate post
war period, all were evaluated for "lessons learned" and all were
viewed as not appropriate for US needs. The Russians had a different
point of view.
As LTC Spurrier sat on a ridge with his driver
watching the 2-14 ACR road march from Schweinfurt to Bad Kissingen in
1951, the infantry squads were in ½ tracks, the tanks were M24s and
M26s and the scouts were in jeeps. Only ten years later, as SCO Judson
F. Miller observed his battalion deploy for Winter Shield maneuvers
from Daley Barracks, all of the major equipment had changed with the
exception of the scouts. They were still in jeeps, but not for long.
The Armored Jeep
To create a comparatively simple vehicle, it
took a fairly long time. In 1954, the Army notified manufactures of
the requirement for a light, multi-use combat vehicle to fill a
variety of roles to include "command and reconnaissance" missions,
medical evacuation and platform for the BAT, Battalion Anti-Tank
cannon. The initial guidance allowed for either wheels of tracks, it
was to have a crew of four, weight class in the area of 8000 pounds
and a top speed of 45 mph. The anticipated number of vehicles to be
purchased numbered in the 3000 range, a fairly significant number, but
the cost per unit was not to exceed a rather low boundary. The
manufactures were to submit prototypes that combined both proven
components and new materials as available.
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During the Army umpired evaluation of the final prototype, a T114
during road tests. Note the turret and upper hull configuration,
both were eliminated prior to production to control costs.
--Cleveland Press Archives |
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Seen from above, the
T114 with the M85 equipped machine gun turret. --Hunnicutt |
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Both Chrysler at Detroit Arsenal and Cadillac
Division of General Motors at the Cleveland Tank Plant expressed
interest, the former proposed diagrams bases on wheeled platforms, the
latter went with the "small-APC" format. Funding was initially granted
to pursue the designs from Cleveland and further funds for six
prototypes were allocated in 1957. The T114 program was well under
way. The light track concept had won the first round of the post war,
scout vehicle evolution.
The prototype scout vehicles delivered to the
Army for testing certainly had a "high tech" look and one can easily
visualize the concept drawings in Cleveland and Washington featuring
teams of T114s and T92 tanks prowling the nuclear battlefield. The
light tracked scout had a two man turret pushed to the rear of the
hull for the commander and observer; it was armed with the M85 .50
caliber machine-gun. Other manufactures were contacted for possible
turret variations and the Army specified that the final turret
decision was separate from approval of the general design of the
vehicle.
The automotive drive line of the T114 was
pulled to the front, engine to the right, driver to the left. The top
of the vehicle featured a rather complicated superstructure design
raising from a shallow raked front slope, however the overall height
of the vehicle remained low. The rear of the T114 had a large
rectangular hatch, the interior space, cramped for three troopers,
allowed for a jump seat and a possible fourth man. Many of the
automotive components were off the shelf GM items to include the 283
CI V8 gas engine and the Hydramatic transmission. This helped control
costs.
The tracks, developed by the Caterpillar
Corporation, were of the "rubber band" type, providing the supposed
advantages of lower costs, reduced weight and ease of maintenance in
comparison with a link track system. Manufactured as a single strip
with bolted in track pads and grousers, this development never lived
up to expectations. In an unsupported configuration on narrow road
wheels, the "rubber band" allowed for the small GM engine, this in
turn saved overall space and weight for the entire vehicle. In the
event of light damage from mines or direct fire, there was no plan for
a crew to repair broken track strips. In 1960, the Army began an
extensive series of tests at Aberdeen, Fort Knox and the Arctic Test
Center to evaluate the prototypes.
Cost Containment and Production
At the test centers and the production floor
at Cleveland Tank Plant, the T114 program was much anticipated as a
"winner". GM began serious planning for the assembly lines and hiring
began necessary to move the Cleveland plant towards full scale
production. In 1961, when the Army announced the required design
modifications resulting from the test phase, some significant changes
occurred, almost all of them designed to lower the cost per individual
vehicle. With so much time already invested in the program, the
designers went back to the blueprints.
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T114 seen from the ¾ view at rear. Note the rectangular rear hull
hatch. This feature was also eliminated at the end of the test
phase. --Hunnicutt |
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M114 early model as issued to the scouts, note pedestal mounted M2
and .30 caliber machine guns, round rear hatch and greatly
simplified upper hull. --Hunnicutt |
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The M85 armed two man turret was eliminated in
favor of a much more simple TC observation hatch-cupola arrangement;
this was moved forward of the previous location. The superstructure of
the hull top was greatly simplified into basically a flat piece of
aluminum, a small hatch was added to the rear of the TC hatch for the
observer and the large rear hull hatch was changed to a less costly
circular design. The armament was to consist of a pintle mounted M2
and a 30 caliber machine-gun for the TC and observer respectively. The
Army continued to look at other turrets that could be retrofitted
later and production funding was allocated to the budget when the new
design, based on the Army’s changes was approved.
As the modified blue prints went to
Washington, the first funds, 2.7 million dollars went to Cleveland to
begin plant modifications at Cadillac to accommodate M114 production
although the final contact had yet to be awarded. The plant had been
operating at about 20 % capacity manufacturing self propelled
howitzers and the Sheridan program was seen as still years away.
Politicians and union halls hailed the new jobs. A Cleveland Press
reported press release in July 1961 stated, " ... it (the M114) will
utilize a considerable number of aluminum parts to conserve weight for
airborne missions. It will carry infantry personnel and have special
weapons capability the details of which remain classified.". In
October of that year, the first large order was authorized with a
value of 15 million dollars. One third of this covered the costs of
the full scale assembly line, the balance paid for an initial run of
1215 vehicles.
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M114A1 featuring the M2 machine-gun in lowered cradle with new
cupola with sighting and internal traverse - elevation controls.
--Hunnicutt |
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Same model, seen from above. --Hunnicutt |
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In August 1962, the assembly line was in full
operation with a single shift of over 3600 employees involved. On hand
as the first M114 was completed was Plant Manager Clifford D. Dernier,
BG Wheeler G. Merriam, Development chief of the Army Material Command
and several local politicians. Counting other contacts in force at the
Cadillac Plant, the Army had committed $ 99, 000, 000 to GM’s defense
efforts. One year later, the Army and GM officials visited the plant
again to hail the 1000th unit built, 200 more were programmed for
delivery that calendar year.
Production continued at full pace through the
following year then, in 1965, began to decrease as the Army expressed
no interest in further large scale orders. The lay offs began as
Chrysler won the contract to operate the plant and M114 production
line went to "slow mode" in anticipation of closing by the end of
1965. A total of 3710 copies were manufactured with an evolution of TC
turrets before M114 production ceased. Fielding appears to have begun
in 1962-1963 to the armored cavalry regiments and divisional
reconnaissance battalions / squadrons.
The Turrets
The pattern later seen with the selection of
the M551 gun system first can be traced to the turret and weapons
associated with the M114. The Army decided to not buy the two man
turret featuring the M85 machine-gun that had survived the design
conferences and prototype models as an austerity measure. However,
just as the Soviet PT 76, with it’s swim capability, had effectively
ended the T 92 program, as the M114 went into production, active
consideration and debate was under way as to how to arm the "armored
jeep" with consideration to the family of light but well armed Soviet
tanks and scout vehicles seen regularly on parade in Moscow.
The Soviet designers had fielded a wide
variety of both tracked and wheeled scout vehicles, many with both
troop carrying and fighting capabilities, that had virtually no NATO
counterparts. The heavy wheeled BTR 60 series, robust BRDM and BMP all
initially dated from this period. In the West, only the British seemed
interested in scout specific vehicles; as West Germany began their own
weapons production in the early 1960s, the first combat vehicles
approved were "heavy scout" platforms.
As the M114s progressed down the assembly
line, the first 600 or so featured the agreed upon pintle mounted M2
and 30 caliber machine-guns. A minor modification involved the
observer’s weapon as the M60 machine-gun entered the Army inventory,
the rear pintle mount changed on the M114. Then, at approximately
vehicle number 601, the turret was changed to accommodate a new sight
and manual traverse and elevation set of controls that would allow the
scout commander to engage targets with the M2 with all hatches closed.
This vehicle eventually was designated as the M114 A1 model.
Other turret and weapon configurations
continued to receive developmental funding and to give the scouts a
heavier weapon, a combination of the built under license- Italian
designed Hispano Suiza 20mm cannon with a powered turret, was funded,
approved for production and retro fitted to previously issued M114A1s.
This 20mm cannon had a long and unhappy life in the US Army; seemingly
every question at the Armor Board at Fort Knox could be answered in
the 1960s by saying, "... well ... lets add the 20mm cannon and see
what happens!". Both the M551 and the MBT 70 were evaluated with the
H-S cannon bolted to the turret top. It was only with the M114,
however, that the weapon actually reached the troops. Once configured
with a new powered cupola and cannon, the vehicle was designated as
the M114E2 if the original platform had been a low serial number M114
or, as the M114A1E1, if the platform had been first designated as an
M114A1.
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M114A1E1 featuring
the H - S 20mm cannon and powered turret, the final design
variant. The blank sheet scout vehicle was taking on a greater
combat role. --Hunnicutt |
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Hunnicutt, with a wealth of wonderful facts
and dates, does not discuss if any of the 20mm equipped M114s were
actually produced at the Cadillac Tank Plant or if the work was done
as either depot level rebuilds or by field modification teams.
Nevertheless, by 1964-1965, the MTO&E for a scout platoon specified
four M114s; operating in pairs, the 20mm cannon equipped vehicles
provided over watch for the M2 equipped vehicles. The platoon leader
was in a jeep or M114, he had an infantry squad and a 4.2 mortar in
their respective tracks and three M60 tanks. Through the 1960s and
well into the 1970s, cavalry, armor and infantry units saw different
vehicle mixes and totals depending on the MTO&E in use.