A "'hypersonic wind tunnel "'is designed to generate a hypersonic flow field in the working section, thus simulating the typical flow features of this flow regime-including compression shocks and pronounced boundary layer effects, entropy layer and viscous interaction zones and most importantly high total temperatures of the flow.
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Today it has four sections : the Working section ( T; draught type ), Trotter section ( J ), Riding section ( R ) and Pony-sized section ( P ) In 1924, the first split in the stud book was created, with the working or draught type ( ) horses in one section, and the " all-around " or " universal " lighter trotting horses in another.
