rolling stock_oriol:Layout 1 19/5/08 11:53 Page 2
ROLLING STOCK
and Renfe’s Train-Ground communication trainset has a very low number of axles car bodies, are of single-axle type with
systems are also installed in this high- (approximately half as many as an their wheels on independent mountings. In
speed EMU. equivalent conventional trainset). This this way, it is possible to have sufficient
The cabin is also an important part of contributes to a perceptible reduction in space between the two wheels for passage
the power head and has a centred driving wheel-rail forces, low noise level emissions between the cars, maintaining the low
position for the driver with an ergonomic and reduced maintenance costs. height of the trainset.
desk and seat that has various adjustments This configuration makes it possible to Trailer bogies with independent
for comfort. The cabin is also pressurised, incorporate unique technical solutions to wheels offer significant advantages over
air tight and air conditioned to create an improve safety conditions (against axles using conventional techniques.
ideal working condition for the train driver. overturning or telescoping) and running This solution prevents the hunting of the
conditions. It also makes it possible to truck and allows excellent stability.
‘‘As in previous Talgo
reduce the height of the trainset. The need for the two wheels on the same
projects, priority has been axle being of identical diameter is also
given in the design and
Car bodies supported at three eliminated, offering important technical
points; better stability! and economic advantages.
construction of the
Each car body will be associated with a
coaches in terms of
Talgo bogie upon which one of its ends is Guided trailer bogies
passenger safety and supported by two large-section pneumatic All trailer bogies in the train are always at
comfort and simplicity in
suspension springs. angle zero and permanently guided on the
the design’’
The opposite end of the car body will track by simple and robust passive
be suspended from the adjacent car by a mechanisms. The guidance mechanism has
set of articulated shafts (weight bearers) the purpose of guiding the axles to
The passenger coaches designed to act as a point support. The car maintain the wheels are always parallel,
The Talgo design body will thus be supported at three both on straight and on curve tracks.
The intermediate coaches of the Talgo 250 points with its support base being It also avoids the longitudinal
belong to the 7th generation series of Talgo triangular. This provides great stability displacements of the rolling assembly with
Pendular coaches designed for 250 km/h. and prevents possible unloading of wheels. respect to the car bodies.
As in previous Talgo projects, priority Each axle has its own guidance
has been given in the design and Low centre of gravity mechanism constituted by the equaliser
construction of the coaches in terms of The articulated connection between cars, beam ‘1’ and the guidance bars. One of
passenger safety and comfort and with the Talgo bogies situated between the the ends of the lower steering bars ‘2-2’
simplicity in the design, in order to car bodies, along with the use of and the upper ones ‘3-3’ is joined to the
achieve maximum reliability while keeping independent wheels, makes it possible for supports ‘4-4’ and ‘5-5’ of the bodyshells
manufacturing, operating and the car bodies in the Talgo trainset to be by an elastic hinge and the other one is
maintenance costs low. at a low height above the track plane. It joined to the equaliser beam by an
The coaches incorporate the basic also means that their centre of gravity is at elastic box hinge.
technical principles of Talgo which are a low level. This feature improves When the two-coupled cars have the
ideally suited for high-speed equipment operating safety by increasing the dynamic same length, both arms of the equaliser
and for achieving the maximum safety and stability of the train. beam are equal and therefore, in a curve,
comfort standards for passengers. its axle is oriented in the radial position
Lightweight construction of regarding the centre of the curve. If the
Articulated connection between cars car bodies coaches have different lengths, then it is
The Talgo 250 consists of two power In order to reduce wheel-rail forces and necessary to have one of the arms longer
heads and a series of intermediates energy costs in commercial operation, than the other to orient the axles in the
coupled together in an articulated fashion. Talgo passenger cars are of lightweight radial position. When the trainset is going
The bogies are shared between the construction with low weight per seat. The into a curve, the supports ‘4’ and ‘5’
cars, on the same transverse plane as the passenger car bodies are constructed using situated in the bodyshells in the inboard
coupling point. The total number of Talgo large extruded aluminium alloy plates, side of the curve get closer and push the
trailer bogies is always equal to the welded together to constitute a self-bearing guidance bars ‘2’ and ‘3’, making the
number of passenger cars plus one. structure, and applying state-of-the-art equaliser beam ‘1’ turn around its axle,
The trainset thus forms an integral design and manufacturing techniques. which produces the displacement of the
assembly providing greater running stability axle of the wheel.
and greater safety, preventing the possible Single-axle trailer trucks with At the same time, in the outer side of
detachment of cars in the event of derailing. independent wheels the curve, the supports ‘4’ and ‘5’ move
This bogie arrangement means that the Trailer bogies, mounted between adjacent away and pull the steering bars ‘2’ and ‘3’
88 EUROPEAN RAILWAY REVIEW
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ISSUE 3
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2008
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