Philip rosenblum at 21:22, 28 June 2006

2006-06-28T21:22:00Z

← Older revision		Revision as of 21:22, 28 June 2006
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	Body-on-frame is an automobile construction technology. Mounting a separate body to a rigid frame which supports the drivetrain was the original method of building automobiles, and its use continues to this day. The original frames were made of wood (commonly ash), but steel ladder frames became common in the 1930s.		'''Body-on-frame''' is an [[automobile]] construction technology. Mounting a separate body to a rigid frame which supports the [[drivetrain]] was the original method of building automobiles, and its use continues to this day. The original frames were made of wood (commonly [[ash tree\|ash]]), but steel '''ladder frames''' became common in the [[1930s]].

	In the USA the frequent changes in automobile design made it necessary to use a ladder frame rather than monocoque to make it possible to change the design without having to change the chassis, allowing frequent changes and improvements to the car's bodywork and interior (where they were most noticable to customers) while leaving the chassis and driveline unchanged, and thus keeping cost down and design time short. It was also easy to use the same chassis and driveline for several very different cars. Especially in the days before computer-aided design, this was a big advantage. [1]		In the USA the frequent changes in [[automobile design]] made it necessary to use a ladder frame rather than [[monocoque]] to make it possible to change the design without having to change the [[chassis]], allowing frequent changes and improvements to the car's bodywork and interior (where they were most noticable to customers) while leaving the chassis and driveline unchanged, and thus keeping cost down and design time short. It was also easy to use the same chassis and driveline for several very different cars. Especially in the days before [[computer-aided design]], this was a big advantage. [http://www.findarticles.com/p/articles/mi_m0KJI/is_2_115/ai_97872909]

	Most small passenger vehicles switched to unibody construction in the 1960s, leaving just ~~trucks~~, ~~buses~~ and large cars using conventional frames. The switch continued for several decades - even ~~SUVs~~ typically use unibody construction today. Body-on-frame remains the preferred construction method for heavy-duty vehicles, especially those which are intended to carry and pull heavy loads.		Most small passenger vehicles switched to [[unibody]] construction in the [[1960s]], leaving just [[truck]]s, [[bus]]es and large cars using conventional frames. The switch continued for several decades - even [[SUV]]s typically use unibody construction today. Body-on-frame remains the preferred construction method for heavy-duty vehicles, especially those which are intended to carry and pull heavy loads.

	The Lincoln Town Car dominates the American limousine market because it is the last American luxury car made with body-on-frame, which makes it easy to "stretch."		The [[Lincoln (automobile)\|Lincoln]] [[Town Car]] dominates the American limousine market because it is the last American luxury car made with body-on-frame, which makes it easy to "stretch."
	~~Contents~~
	~~[hide]~~

	* 1 Advantages and disadvantages compared to unibody		==Advantages and disadvantages compared to unibody==
	~~o 1.1~~ Advantages		=== Advantages ===
	~~o 1.2 Disadvantages~~		* Generally more comfortable because fewer vibrations from engine and wheels reach the driver
	* ~~2 See also~~		* Easier to design, build and modify (less of an issue now [[CAD]] is commonplace)
	* ~~3 External Links & Sources~~		* More suited for heavy duty usage and more durable
			* Easier to modify

	~~[edit]~~		=== Disadvantages ===
			* Heavier than unibody
			* Center of gravity is usually higher
			* Less resistant to torsion (flexing of the whole car in corners)

	~~Advantages and disadvantages compared to unibody~~		==See also==
	[~~edit~~]		* [[Coachwork\|Carrossery]]
			* [[Monocoque]]
			* [[Spaceframe]]
			* [[Subframe]]
			* [[Superleggera]]

	~~Advantages~~		==External Links & Sources==

	* Generally more comfortable because fewer vibrations from engine and ~~wheels reach the driver~~		1. [http://www.findarticles.com/p/articles/mi_m0KJI/is_2_115/ai_97872909 Article about body-on-frame in modern cars and trucks]
	* Easier to design, build and modify (less of an issue now CAD is commonplace)
	* More suited for heavy duty usage and more durable
	* Easier to modify

	[~~edit~~]		2. [http://www.findarticles.com/p/articles/mi_m3012/is_n1_v178/ai_20160852 Body on frame and unibody in SUVs]

	~~Disadvantages~~		3. [http://www.oldchesterpa.com/ford_assembly_pics.htm Ford assembly line featuring body-on-frame car (historic)]

	* Heavier than unibody		[[Category:Automotive technologies]]
	* Center of gravity is usually higher
	* Less resistant to torsion (flexing of the whole car in corners)

	[~~edit]~~

	~~See also~~

	* Carrossery
	* Monocoque
	* Spaceframe
	* Subframe
	* Superleggera

	[~~edit]~~

	~~External Links & Sources~~

	~~1. Article about body-on-frame in modern cars and trucks~~

	~~2. Body on frame and unibody in SUVs~~

	~~3. Ford assembly line featuring body-on-frame car (historic)~~
	~~Retrieved from "http://en.wikipedia.org/wiki/Body-on-frame"~~

	~~Categories~~: Automotive technologies

Philip rosenblum at 21:20, 28 June 2006

2006-06-28T21:20:45Z

New page

Body-on-frame is an automobile construction technology. Mounting a separate body to a rigid frame which supports the drivetrain was the original method of building automobiles, and its use continues to this day. The original frames were made of wood (commonly ash), but steel ladder frames became common in the 1930s.

In the USA the frequent changes in automobile design made it necessary to use a ladder frame rather than monocoque to make it possible to change the design without having to change the chassis, allowing frequent changes and improvements to the car's bodywork and interior (where they were most noticable to customers) while leaving the chassis and driveline unchanged, and thus keeping cost down and design time short. It was also easy to use the same chassis and driveline for several very different cars. Especially in the days before computer-aided design, this was a big advantage. [1]

Most small passenger vehicles switched to unibody construction in the 1960s, leaving just trucks, buses and large cars using conventional frames. The switch continued for several decades - even SUVs typically use unibody construction today. Body-on-frame remains the preferred construction method for heavy-duty vehicles, especially those which are intended to carry and pull heavy loads.

The Lincoln Town Car dominates the American limousine market because it is the last American luxury car made with body-on-frame, which makes it easy to "stretch."
Contents
[hide]

* 1 Advantages and disadvantages compared to unibody
o 1.1 Advantages
o 1.2 Disadvantages
* 2 See also
* 3 External Links & Sources

[edit]

Advantages and disadvantages compared to unibody
[edit]

Advantages

* Generally more comfortable because fewer vibrations from engine and wheels reach the driver
* Easier to design, build and modify (less of an issue now CAD is commonplace)
* More suited for heavy duty usage and more durable
* Easier to modify

[edit]

Disadvantages

* Heavier than unibody
* Center of gravity is usually higher
* Less resistant to torsion (flexing of the whole car in corners)

[edit]

See also

* Carrossery
* Monocoque
* Spaceframe
* Subframe
* Superleggera

[edit]

External Links & Sources

1. Article about body-on-frame in modern cars and trucks

2. Body on frame and unibody in SUVs

3. Ford assembly line featuring body-on-frame car (historic)
Retrieved from "http://en.wikipedia.org/wiki/Body-on-frame"

Categories: Automotive technologies

Body-on-frame - Revision history

Philip rosenblum at 21:22, 28 June 2006

Philip rosenblum at 21:20, 28 June 2006