Quote:
Originally Posted by Busy Bee
Not every passenger coach in europe uses a Jacobs bogie. Theyre actually the minority. On highspeed sets yes but the majority of coach cars are dual truck independent suspension.
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Very true, dual trucks and Jacobs bogies exist in Europe. So, why one over the other - there must be a reason Jacobs bogies exist? What are their advantages and disadvantages?
Per Wiki Jacobs bogies
Advantages
Safety, because the trains are less prone to collapse like an accordion after derailing. A Eurostar train has been recorded as having derailed at a speed close to 300 km/h with no resultant loss of life or severe injuries among its passengers.
Lower weight and simpler and cheaper construction because bogies are heavy, expensive, and complex structures.
Less rail squeal and other wheel-to-rail noise because of fewer bogies (wheels).
Disadvantages
The vehicles are semi-permanently coupled and can only be separated in the workshop. However, some flexibility may be achieved by coupling two or three trains together.
Fewer bogies and fewer wheelsets mean greater axle loads – if everything else is equal (in actually - rail cars are usually shorter for clearance purposes which reduces the amount of greater axle loads).