Editing Disc brake (section)

=== Rail and aircraft ===
[[File:Tōkyū 7000 series EMU 011.JPG|thumb|A railroad [[bogie]] and disc brakes]]

Still-larger discs are used for [[railroad car]]s, [[tram]]s, and some [[airplane]]s. [[Passenger car (rail)|Passenger rail cars]] and [[light rail vehicle]]s often use disc brakes outboard of the wheels, which helps ensure a free flow of cooling air. Some modern passenger rail cars, such as the [[Amfleet|Amfleet II cars]], use inboard disc brakes. This reduces wear from debris and provides protection from rain and snow, which would make the discs slippery and unreliable. However, there is still plenty of cooling for reliable operation. Some airplanes have the brake mounted with very little cooling, and the brake gets hot when stopping. This is acceptable as there is sufficient time for cooling, where the maximum braking energy is very predictable. Should the braking energy exceed the maximum, for example during an emergency occurring during take-off, aircraft wheels can be fitted with a [[fusible plug]]<ref>{{cite web|url= https://patents.google.com/patent/US4628953A/en |title= Fusible plug safety device for venting aircraft tires}}</ref> to prevent the tire bursting. This is a milestone test in aircraft development.<ref>{{cite web|url= https://www.airbus.com/newsroom/press-releases/en/2014/07/a350-xwb-msn001-successfully-conducted-maximum-energy-rejected-take-off-test.html |title=A350 XWB MSN001 successfully conducted 'Maximum Energy Rejected Take-Off' test|date=14 June 2021 }}</ref>