Mass - Revision history

IvoPivo: Added rotating mass

2020-05-20T14:26:27Z

Added rotating mass

IvoPivo: /* Unsprung mass */

2020-05-20T14:15:27Z

Unsprung mass

IvoPivo: /* Unsprung mass */

2020-05-20T14:14:07Z

Unsprung mass

IvoPivo: /* Unsprung mass */

2020-05-20T14:08:13Z

Unsprung mass

IvoPivo: /* Non-Suspended Mass */

2020-05-20T14:07:08Z

Non-Suspended Mass

Toaster: /* Center of Mass/Center of Gravity */

2020-05-17T17:24:56Z

Center of Mass/Center of Gravity

Toaster at 19:57, 16 May 2020

2020-05-16T19:57:11Z

Toaster: Toaster moved page Weight to Mass: Making title better

2020-05-16T19:56:13Z

Toaster moved page Weight to Mass: Making title better

Bertaveira: Add Non-suspended mass section

2020-05-16T19:31:09Z

Add Non-suspended mass section

Bertaveira: Add link to center of mass page

2020-05-16T19:10:59Z

Add link to center of mass page

@@ Line 5: / Line 5: @@
 The center of mass is the point that describes the average of the mass and position of every part of the vehicle, while the center of gravity is the point that describes the average of the weight and position of every part of the vehicle. For the purposes of this article, center of mass and center of gravity will be used interchangeably.
 ==Inertia==
 According to Newton's 1st Law, an object at rest stays at rest and an object in motion stays in motion. We are familiar with this concept in the form of momentum. As a general rule, engineers try to reduce the inertia of the vehicle in order to increase the maximum acceleration of the vehicle.
@@ Line 23: / Line 22: @@
 Make sure the car is in ready to race condition with tyres <span>(at least when it comes to wheel and suspension)</span>. Raise the car and put a weight scale under the tyre. Make sure the raise the car just enough for the wheels not to be touching the scale but as close to touching as possible. Then disconnect the pushrod from the chassis side. Let the wheel fall onto the scale and the mass you measure is the unsprung mass of that wheel. Do this for all four wheel to obtain the total unsprung mass.
 ===Analytical method===
 [[Category:Vehicle Dynamics]]

@@ Line 17: / Line 17: @@
 ==Unsprung mass==
-The unsprung mass is the mass that, as the name implies, is "not sprung", i.e. not suspended by the vehicles suspension. For example the tyres are unsprung mass. There are parts of the car that can not be described as purely sprung or unsprung mass. Parts like the push rod can be partially sprung. <br /><br />Unsprung mass is worse for the car's performance than sprung mass, as the unsprung mass negatively affects the tire's bump-following ability. This is further compounded by the fact that a significant porportion of the unsprung mass consists of the wheel assembly, which is also rotating mass. Because of this we need ways to measure the unsprung part of the vehicle's mass. There are three main ways of doing this.
+The unsprung mass is the mass that, as the name implies, is "not sprung", i.e. not suspended by the vehicles suspension. For example the tyres are unsprung mass. There are parts of the car that can not be described as purely sprung or unsprung mass. Parts like the push rod can be partially sprung. <br /><br />Unsprung mass is worse for the car's performance than sprung mass, as the unsprung mass negatively affects the tire's bump-following ability. This is further compounded by the fact that a significant portion of the unsprung mass consists of the wheel assembly, which is also rotating mass. Because of this we need ways to measure the unsprung part of the vehicle's mass. There are three main ways of doing this.
 ===English method===
 Measure the mass of all suspension components and assume that only a third is sprung while the rest is unsprung.

@@ Line 17: / Line 17: @@
 ==Unsprung mass==
-The unsprung mass is the mass that, as the name implies, is "not sprung", i.e. not suspended by the vehicles suspension. For example the tyres are unsprung mass. There are parts of the car that can not be described as purely sprung or unsprung mass. Parts like the push rod can be partially sprung. Because of this we need ways to measure the unsprung part of the vehicle's mass. There are three main ways of doing this.
+The unsprung mass is the mass that, as the name implies, is "not sprung", i.e. not suspended by the vehicles suspension. For example the tyres are unsprung mass. There are parts of the car that can not be described as purely sprung or unsprung mass. Parts like the push rod can be partially sprung. <br /><br />Unsprung mass is worse for the car's performance than sprung mass, as the unsprung mass negatively affects the tire's bump-following ability. This is further compounded by the fact that a significant porportion of the unsprung mass consists of the wheel assembly, which is also rotating mass. Because of this we need ways to measure the unsprung part of the vehicle's mass. There are three main ways of doing this.
 ===English method===
 Measure the mass of all suspension components and assume that only a third is sprung while the rest is unsprung.

@@ Line 17: / Line 17: @@
 ==Unsprung mass==
-The unsprung mass is the mass that, as the name implies, is "not sprung", i.e. not suspended by the vehicles suspension. For example the tyres are unsprung mass. There are however parts of the car that are quite hard to describe as only sprung or unsprung mass. Parts like the push rod can be partially sprung. Because of this we need ways to measure the unsprung part of the vehicle's mass. There are three main ways of doing this.
+The unsprung mass is the mass that, as the name implies, is "not sprung", i.e. not suspended by the vehicles suspension. For example the tyres are unsprung mass. There are parts of the car that can not be described as purely sprung or unsprung mass. Parts like the push rod can be partially sprung. Because of this we need ways to measure the unsprung part of the vehicle's mass. There are three main ways of doing this.
 ===English method===
 Measure the mass of all suspension components and assume that only a third is sprung while the rest is unsprung.

@@ Line 16: / Line 16: @@
-==Non-Suspended Mass==
+==Unsprung mass==
-The non suspended mass is the mass that, as the name implies, is not suspended. For example the tyres are non suspended mass. There are however parts of the car that are quite hard to describe as only suspended or non-suspended mass. Parts like the push rod can be partially suspended. Because of this we need ways to measure the non-suspended part of the vehicle's mass. There are three main ways of doing this.
+The unsprung mass is the mass that, as the name implies, is "not sprung", i.e. not suspended by the vehicles suspension. For example the tyres are unsprung mass. There are however parts of the car that are quite hard to describe as only sprung or unsprung mass. Parts like the push rod can be partially sprung. Because of this we need ways to measure the unsprung part of the vehicle's mass. There are three main ways of doing this.
-===English Method===
+===English method===
-Measure the mass of all suspension components and assume that only a third is suspended while the rest is non-suspended.
+Measure the mass of all suspension components and assume that only a third is sprung while the rest is unsprung.
-===Scale Method===
+===Scale method===
-Make sure the car is in ready to race condition with tyres <span>(at least when it comes to wheel and suspension)</span>. Raise the car and put a weight scale under the tyre. Mke sure the raise the car just enough for the wheels not to be touching the scale but as close to touching as possible. Then disconnect the pushrod from the chassis side. Let the wheel fall onto the scale and the mass you measure is the non-suspended mass of that wheel. Do this for all four wheel to obtain the total non-suspended mass.
+Make sure the car is in ready to race condition with tyres <span>(at least when it comes to wheel and suspension)</span>. Raise the car and put a weight scale under the tyre. Make sure the raise the car just enough for the wheels not to be touching the scale but as close to touching as possible. Then disconnect the pushrod from the chassis side. Let the wheel fall onto the scale and the mass you measure is the unsprung mass of that wheel. Do this for all four wheel to obtain the total unsprung mass.
-===Analytical Method===
+===Analytical method===
 [[Category:Vehicle Dynamics]]

@@ Line 1: / Line 1: @@
 '''Mass '''is a property of any physical body. In terms of vehicle dynamics, the main effect of mass is to change the inertia of the vehicle which affects the way the vehicle accelerates and rotates. The position and amount of weight of the vehicle also affects vehicle handling and stability.
 ==Center of Mass/Center of Gravity==
-The [[Center of_Gravity_(CG)|center of mass]] is the point that describes the average of the mass and position of every part of the vehicle, while the center of gravity is the point that describes the average of the weight and position of every part of the vehicle. For the purposes of this article, center of mass and center of gravity will be used interchangeably.
+{{Main|Center of Gravity}}
 ==Inertia==

← Older revision	Revision as of 19:56, 16 May 2020
(No difference)

← Older revision		Revision as of 19:31, 16 May 2020
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		+
		+	==Non-Suspended Mass==
		+	The non suspended mass is the mass that, as the name implies, is not suspended. For example the tyres are non suspended mass. There are however parts of the car that are quite hard to describe as only suspended or non-suspended mass. Parts like the push rod can be partially suspended. Because of this we need ways to measure the non-suspended part of the vehicle's mass. There are three main ways of doing this.
		+	===English Method===
		+	Measure the mass of all suspension components and assume that only a third is suspended while the rest is non-suspended.
		+	===Scale Method===
		+	Make sure the car is in ready to race condition with tyres <span>(at least when it comes to wheel and suspension)</span>. Raise the car and put a weight scale under the tyre. Mke sure the raise the car just enough for the wheels not to be touching the scale but as close to touching as possible. Then disconnect the pushrod from the chassis side. Let the wheel fall onto the scale and the mass you measure is the non-suspended mass of that wheel. Do this for all four wheel to obtain the total non-suspended mass.
		+	===Analytical Method===


	[[Category:Vehicle Dynamics]]		[[Category:Vehicle Dynamics]]