Salve,
cercando nel web ho trovato questa descrizione degli Ucs 908 / 909 - Kds 54 / 56 nel catalogo Brawa 2011:
"After 1945, the vast destruction of residential buildings
and infrastructure led to a high demand for the transport
of building materials. Due to the number of buildings
that needed to be replaced and the lack of manpower,
the order of the day was to build fast and cheap. Thus,
concrete was the building material of this period – this
also occurred before the war, but not the same extent.
One of the most important components, cement, was
almost exclusively packed in paper bags and transported
in covered trucks. This process was time-consuming and
expensive. Tank cars for powdered materials such as coal
dust had been available for some time, but their use was
limited at that point to a few private adjusters. One of
the reasons was that it was very difficult to completely
empty the cargo, which caused many interruptions in
loading and unloading. DB, jointly with the railcar industry,
developed a new two-axle powder tank car with two
standing containers. Westwaggon delivered the first ten
cars to DB for inspection in 1953. Since they still had a
Hik braking system, they were designated Kd 54. They
also had a dual link suspension system, as did the next
150 cars from Talbot and Westwagon. Because of this,
coupled with the very special undercarriage construction
of the Kds 54, all subsequent deliveries received a simple
link suspension system. After only 50 cars had been
made, the container volume was doubled to 27 m³. The
cars proved so useful that a total of 1222 Kds 54s were
ordered by 1964. In addition, a car was designed with
two tanks of 34 m³ capacity and put into service as the
Kds 56. In contrast to the Kds 54, which was rIv-compatible,
the Kds 56 could only be used internationally under
special agreements. In addition to DB, private adjuster
cars of this type were produced as well, for example, the
animal feed mill "Albert O. Petersen" ("Club Mast"),
varta and Heidezement."In sostanza la descrizione conferma quanto gia' detto da Dario, ossia che gli Ucs 908 sono compatibili con le norme RIV, mentre gli UCS 909 non lo sono.
La descrizione aggiunge, pero', che gli Ucs 909 "possono essere usati internazionalmente sotto particolari accordi".
Il che non ne esclude la possibilita' al traffico internazionale.
E per me sarebbe gia' piu' che sufficiente...
Quello che mi continua a rimanere misterioso e' perche' il VTG FS di Roco, che la foto pubblicata da Paolo dimostra essere fedele, sia marcato RIV.
Purtroppo dalla foto non e' possibile vedere in alcun modo la marcatura.
Uno svarione di Roco ?
Mi par strano che un certo tipo di carro possa essere considerato non RIV per le DB, ma esserlo per le FS...
Saluti
Stefano.