Editing Tilting train (section)

==Technology==
[[File:Electric Tilt Train at Roma Street, 2001.jpg|thumb|An [[Electric Tilt Train]]. In 1999, an Electric Tilt Train set an Australian speed record of 210 km/h, making it the fastest narrow-gauge train in service.]]
[[File:X2000 in Chicago showing tilting ability.jpg|thumb|The [[X 2000]] train on a US tour at [[Chicago Union Station]], [[Illinois]], in 1993. This composite image shows the extent to which the train can tilt in either direction.]]
[[File:NeiTech-Demo SBB RABDe 500.ogg|thumb|Demonstration of the Tilting-Technology of a SBB RABDe 500 in stand]]

Many of the problems with motion sickness are related to the fact that traditional servo systems respond inappropriately to the changes in trajectory forces, and even small errors, whilst not being consciously perceivable, cause nausea due to their unfamiliar nature. The original [[Fiat]] ETR 401 used individual gyroscopes in each carriage so there was a lag, even though nausea had not been a major problem with this train. The [[Advanced Passenger Train|APT]] was supposed to overcome this problem by using gyroscopes at the ends of the train and a leader/follower control system which defined a "tilting curve" for the whole train. It would appear that the technology of the era was unable to properly implement this technique.{{Cn|date=June 2024}}

Modern tilting trains profit from state-of-the-art signal processing which senses the line ahead and is able to predict optimal control signals for the individual carriages. Complaints about nausea have largely become a thing of the past.{{Cn|date=June 2024}}

Some tilting trains run on [[narrow-gauge railway]]s. In Japan there are many narrow gauge lines in mountainous regions, and tilting trains have been designed to run there. In Australia, the service between [[Brisbane]] and [[Cairns]] by the [[QR Tilt Train]] claims to be the fastest narrow-gauge train in the world, running at {{convert|160|km/h|mi/h|0|abbr=on}}. The [[Electric Tilt Train]] also holds the record for the fastest narrow-gauge train by maximum test speed, reaching 210 km/h.<ref>{{Cite web |url=http://www.smh.com.au/news/National/Worlds-fastest-on-narrow-tracks/2004/11/16/1100574468966.html |title=World's fastest on narrow tracks - National |website=smh.com.au |date=17 November 2004 |language=en |access-date=2017-06-27}}</ref>

With tilting EMUs, consideration is required on keeping the pantographs within the railway gauge. When mounted on top of a tilting car, the pantograph usually sways in the opposite direction in order to counter for the degree of tilting. This is done mechanically on for instance the British [[British Rail Class 390|Class 390 Alstom Pendolino]]. On the German [[ICE T|class 411 and 415]], the pantographs are however mounted on a separate non-tilting frame within the cars.