roll cage on:
[Wikipedia]
[Google]
[Amazon]
A roll cage is a specially engineered and constructed frame built in (or sometimes around, in which case it is known as an exo cage) the passenger compartment of a vehicle to protect its occupants from being injured or killed in an accident, particularly in the event of a rollover.
There are many different roll cage designs depending on the application. Hence, various racing organizations have differing specifications and regulations, although most of these organizations harmonize their rules with those of the FIA.
Roll cages help to stiffen the
File:Atkinson WRC Impreza in shop.jpg, A 2006 Subaru Impreza WRC bodyshell with integrated roll cage
File:2010 Porsche 997 GT3 RS 3.8 red roll cage.jpg, Roll cage in a Porsche 997 GT3 RS.
File:RacecarRollcage2003.jpg, A race car stripped down to its roll cage and firewalls
Designs
There are many different roll cage designs depending on the application. Hence, various racing organizations have differing specifications and regulations, although most of these organizations harmonize their rules with those of the FIA.
Roll cages help to stiffen the chassis
A chassis (, ; plural ''chassis'' from French châssis ) is the load-bearing framework of a manufactured object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart ...
, which is desirable in racing applications. Racing cages are typically either bolt-in or welded-in, with the former being more straightforward and cheaper to fit while the latter is stronger and more substantial.
A roll bar is a single bar behind the driver that provides moderate rollover protection. Due to the lack of a protective top, some modern convertibles utilize a strong windscreen frame acting as a roll bar. Also, a roll hoop may be placed behind both headrests (usually one on older cars), which is essentially a roll bar spanning the width of a passenger's shoulders.
Road cars
A newer form of rollover protection, pioneered on the Mercedes-Benz R129 in 1989, is deployable roll hoops that are usually hidden within the body of a car. When sensors detect an imminent rollover, the roll hoops quickly extend and lock in place. Cars that have a deployable rollover protection system include the Peugeot 307 CC, Volvo C70, Mercedes-Benz SL 500,Jaguar XK
The Jaguar XK is a two-door 2+2 grand tourer manufactured and marketed by Jaguar Cars from 1996–2012 and by Jaguar Land Rover from 2013–2014 in hatchback coupé and convertible body styles, across two generations. The XK was intro ...
, and the Lamborghini Reventón Roadster.
Other applications
Roll bars are also used historically on row crop tractors, and roll cages are incorporated as part of the cab on modern tractors.See also
* Active rollover protection *List of auto parts
This is a list of auto parts, which are manufactured components of automobiles. This list reflects both fossil-fueled cars (using internal combustion engine
An internal combustion engine (ICE or IC engine) is a heat engine in which the c ...
* Rollover protection structure
A rollover protection structure or rollover protection system (ROPS) ( or ) is a system or structure intended to protect equipment operators and motorists from injuries caused by vehicle overturns or rollovers. Like rollcages and rollbars in ...
References
External links
{{commons category, Roll cages Vehicle safety technologies