In the late 2010s it initiated a high-speed intercity programme with rolling stock designed for operation at 220 km/h, including cross-border service into Austria. At the centre of the programme sat the IC+ driving trailer — the cab-carrying passenger coach at the head of the trainset — developed within the Hungarian rail-manufacturing supply base. Rolling stock in this operating envelope brings EN 14067-6 into scope: the European standard for railway aerodynamic behaviour, and specifically the framework governing how crosswind stability must be analytically demonstrated.
EN 14067-6 does not accept an unqualified CFD study as evidence of crosswind stability. Before a candidate analyst may apply CFD to a specific vehicle, the standard requires reproduction of a mandated wind-tunnel benchmark for one of three reference high-speed trains — ETR 500, ICE 3, TGV — within a fixed tolerance. MÁV engaged eCon to establish that qualified route and to build the analytical foundation the vehicle-specific assessment would sit on top of.
The mechanical and structural work that dominates rail engineering shares little methodological ground with the compressible, high-Reynolds-number external flow EN 14067-6 demands; the workforce, software and infrastructure for it rarely sit inside a passenger-rail design office, in Hungary or elsewhere in Europe.
eCon obtained the reference model and the public wind-tunnel dataset from the European standardisation body responsible for maintaining the benchmark; the model corresponds to one of the three reference high-speed vehicles — ETR 500, ICE 3, TGV — for which measured rolling-moment data across yaw angles is published.
The physical setup was assembled around the standard's own scene definition. The vehicle sits on a standard railway embankment in single-track configuration, defined explicitly by EN 14067-6 so that every analyst works against identical geometry. The CFD domain, boundary conditions and free-stream velocity were configured to reproduce the wind-tunnel test conditions rather than a scaled operational scenario.
Yaw angles from head-on flow through to lateral wind were resolved, and the rolling moment coefficient — the tipping tendency the crosswind exerts on the vehicle at each yaw angle — was extracted as the output-of-record. The most demanding angle is not full lateral flow but oblique flow near 50°, where lift and side force combine most unfavourably; the benchmark curve peaks in that region, and the reproduction is judged there.
Across the full sweep, eCon's simulated rolling-moment curve sat inside EN 14067-6's tolerance band and traced close to the mid-line of the band, not near its edge. The consequence is durable: the standard's own qualification gate is passed, and the method, mesh strategy, turbulence model and modelling ratios established here transfer to any subsequent high-speed vehicle — only the geometry changes.
The wider MÁV programme did not progress to the vehicle-specific analysis it was pre-qualifying for; the intercity plan halted for reasons unconnected to the aerodynamic scope. The benchmark qualification itself, however, is durable and vehicle-independent — for any subsequent high-speed rail programme requiring EN 14067-6 crosswind demonstration, eCon can begin at the vehicle model, not at the standard's qualification gate.
For a high-speed programme, EN 14067-6 sets the aerodynamic hurdle. eCon cleared the standard's benchmark within tolerance and gave us the qualified method the vehicle-specific work would have inherited.
— Firstname Lastname, [Role], MÁV
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