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A chassis (, ; plural ''chassis'' from French châssis ) is the structural load, load-bearing structural frame, framework of an artificial object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis.
In firearms, the chassis is a rifle bedding, bedding frame on long guns such as rifles to replace the traditionally wooden Stock (firearms), stock, for the purpose of better accurizing the gun. The chassis is usually made from hard metallic material such as aluminium alloy (and less frequently stainless steel, titanium alloy or recently magnesium alloy) due to metals having superior stiffness and compressive strength compared with wood or synthetic polymer, which are commonly used in conventional rifle stocks.
The chassis essentially functions as a more extensive pillar bedding, providing a metal-on-metal bearing surface that has reduced shifting potential under the stress of recoil. A gun barrel, barreled action (firearms), action bedded into a metal chassis would theoretically operate more consistently during repeated firing, resulting in better accuracy and precision, precision. With the increasing availability of CNC machining, chassis have become more affordable and sophisticated, and gained increasing popularity as it can also be expanded to accommodate customizable "furnitures" (buttstock, pistol grip, etc.) and rail interface systems that provide mounting points for various accessories.
A chassis (, ; plural ''chassis'' from French châssis ) is the structural load, load-bearing structural frame, framework of an artificial object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis.
Examples of use
Vehicles
In the case of vehicles, the term ''rolling chassis'' means the frame (vehicle), frame plus the "running gear" like engine, transmission (mechanics), transmission, drive shaft, differential (mechanical device), differential and suspension (vehicle), suspension. An underbody (sometimes referred to as "coachwork"), which is usually not necessary for integrity of the structure, is built on the chassis to complete the vehicle. For commercial vehicles, a rolling chassis consists of an assembly of all the essential parts of a truck without the body to be ready for operation on the road. A car chassis will be different from one for commercial vehicles because of the heavier loads and constant work use. Commercial vehicle manufacturers sell "chassis only", "cowl and chassis", as well as "chassis cab" versions that can be outfitted with specialized bodies. These include Recreational vehicle, motor homes, fire apparatus, fire engines, ambulances, box trucks, etc. In particular applications, such as school buses, a government agency like National Highway Traffic Safety Administration (NHTSA) in the U.S. defines the design standards of chassis and body conversions. An armoured fighting vehicle's hull serves as the chassis and comprises the bottom part of the AFV that includes the continuous track, tracks, engine, driver's seat, and crew compartment. This describes the lower hull, although common usage might include the upper hull to mean the AFV without the gun turret, turret. The hull serves as a basis for Car platform, platforms on tanks, armoured personnel carriers, military engineering vehicles, combat engineering vehicles, etc. In the intermodal freight transport, intermodal trucking industry, a Container chassis, chassis is a type of semi-trailer onto which a intermodal container, cargo container can be mounted for road transport.Electronics
In an electronic device (such as a computer), the chassis consists of a frame or other internal supporting structure on which the printed circuit board, circuit boards and other electronics are mounted. In some designs, such as older ENIAC sets, the chassis is mounted inside a heavy, rigid cabinet, while in other designs such as modern computer cases, lightweight covers or panels are attached to the chassis. The combination of chassis and outer covering is sometimes called an ''enclosure''.Firearms
In firearms, the chassis is a rifle bedding, bedding frame on long guns such as rifles to replace the traditionally wooden Stock (firearms), stock, for the purpose of better accurizing the gun. The chassis is usually made from hard metallic material such as aluminium alloy (and less frequently stainless steel, titanium alloy or recently magnesium alloy) due to metals having superior stiffness and compressive strength compared with wood or synthetic polymer, which are commonly used in conventional rifle stocks.
The chassis essentially functions as a more extensive pillar bedding, providing a metal-on-metal bearing surface that has reduced shifting potential under the stress of recoil. A gun barrel, barreled action (firearms), action bedded into a metal chassis would theoretically operate more consistently during repeated firing, resulting in better accuracy and precision, precision. With the increasing availability of CNC machining, chassis have become more affordable and sophisticated, and gained increasing popularity as it can also be expanded to accommodate customizable "furnitures" (buttstock, pistol grip, etc.) and rail interface systems that provide mounting points for various accessories.
See also
*Airframe *Backbone chassis *Body-on-frame *Coachbuilder *Monocoque, construction from a structural shell instead of a structural frame *Undercarriage (disambiguation)References
*Starry, Donn A. GEN. ''Mounted Combat in Vietnam.'' ''Vietnam Studies''; Department of the Army, Washington, D.C. 1978. {{CarDesign nav Automotive chassis types Vehicle technology Computer enclosure Carriages and mountings