What is the impact on the dynamics and comfort reducing weight the wheels.
Sat studied today, what is the use of lighter wheels (in my case magnesium wheels with tires R13 are lighter than Tires TOYO Proxes T1R 205/50R15, wheels ENKEI, which I rode last summer somewhere on 6.5 kg. each wheel) Information about what affects the weight of the wheels are different, from the comparison easier 1 kg. weight of the wheel is relieved of the weight of the body from 3 kg. (minimum), up to 20-30 kg. In theory it looks like this:
Unsprung weight — the concept is applicable to land vehicles having suspension, which means the mass including the mass of the wheels and other parts attached directly to it (rims, tires, brake components located on the wheel). Lots of other items that are held above the ground suspension, is called the sprung mass (eng.).
The ratio of sprung and unsprung masses is of great importance, since the force with which the unsprung components affect the car from the bottom up, must be compensated by the weight of the sprung mass. Otherwise, the car loses grip with the road surface, which affects its handling. To overcome this problem, a set of lightweight wheels and tires.
In addition to handling the weight of the wheel affects the vehicle dynamics. So, the heavier the wheel, the more energy and time it will take to change the speed of their rotation. The same applies to the braking process. However, the contribution of the rotational energy of the wheels into the overall energy of motion of the vehicle is negligible, and therefore really feel the change in the dynamics of acceleration and braking impossible.
The ratio of the unsprung and the sprung masses in a vehicle is on average 1:30. Changing this ratio you can achieve a high smoothness of the car. This ratio can be changed in two ways: by increasing the sprung mass or the unsprung reducing. However, if you increase the sprung mass, for example, to load to the maximum the interior of the car, performance will decrease. But reducing the unsprung mass, it is possible to maintain and even to improve the dynamics, while achieving a high smoothness. And this can be achieved only by reducing the weight of the wheels. The weight reduction of the wheels on the 1 kilogram from the point of view of dynamics is equivalent to reducing the weight in the car about 3 kg. From the point of view of the comfort — by 10. Thus, if you replace discs you reduce weight each is only 2 pounds (for a total of 8 pounds), then your machine will go as smoothly as if it got passengers weighing 110-150 kg, and just as quickly as if from the cabin threw a 30 kg (and the passenger did not sit down at all).
In my case, relieved of the weight of 4 wheels 26 kg. If you take the minimum, then when accelerating the car is tantamount to reducing the weight of the car on 97.5 kg (two girls of 50 kg. or one guy weighing 100 kg, which supposedly all summer rolled on old wheels and today landed (for new) and food without them)), and ride as if the car was loaded 357 kg (that is four passengers at 90 kg each), Ronki, which is lightweight, is very important!
For interest estimated estimated spread weight wheels and tires, depending on their materials and sizes. Can someone come in handy.
informative)) and on 205 rubber ronke nothing draws the front and back? or something eliminated "curtesy")) ?
Excellent article! I chase summer and winter on the forged disks. And other I don't recognize. Moreover, all-all suggest something like this. But chose not rubber 215 to 55, as a staff, and 205 for 60. Sensitive already(boast less of course!) but above 1cm, and this breakdown in the pits influences the rolling resistance is less.
And nobody believes that I have such a small (relatively) fuel consumption...
An article I copied in your *Inbox*
Support Your initiative. Your car passed it all, and there were moments of driving on the same tires, but on the stamps and forged. Now I have two sets of VSMPO 13". Every time you change forged wheels, forged felt improved driving dynamics, responsiveness of the machine to the actions of the wheel. Another plus — the strength of forging. This winter I have shot a tire plus had a couple of very bad holes. The result is a tire replacement, wheel balancing and moving on. A forged wheel would just throw (the rolling I do not believe)...
Mass — useful information! And how about these impact on the comfort and acceleration? Been looking for tests that can not be found.
Aha ha))) well, just mega experiment, and most importantly very accurate))))
Muscles as I play))) Ooh!)))
This resource is here are natural experiments: www.drive2.ru/l/1301219/?...3198347&page=2#a113198347
If you want a theory here: www.drive2.ru/l/3561077/
one guy on YouTube has tested the overclocking on molded disks and on the cast, weighed, and those and others/measure the difference, but in practice it did not give anything
Also thought the weight of wheels)))
Here you can credit. There are more than 5500 kinds of disck with their exact weights:
www.drive2.ru/l/5486028/
Now choose the rubber. And... the rubber has not less influence on unsprung mass. The rubber Tode is different weights and may differ seriously. For example in the amount of 225/45/27 one rubber can weigh 8.4 kg and another 12-13kg. The weight on the periphery of the disk and a large influence on the moment of inertia and in consequence on the dynamics, but the comfort is naturally the same weight effect as you zametil.
How to find if someone has two bridges neokessaria? Or Lite this parameter is not important due to low speed riding? :D
RomanSmirnov
First, the wheel is the flywheel, and then nepotushennaya weight for weigh you're not spinning the wheel, which is in the process of moving, actually, has a momentum has a kinetic energy and gyroscopic effect.
What is the flywheel we all know. The main component of the angular momentum.
Angular momentum — the amount dependent on how much mass is rotating as it is distributed about the axis of rotation and the speed with which the rotation occurs.
The observed gyroscopic effect is precession of the axis of rotation around its original direction when the external force does not coincide with the direction of the axis of rotation.
The concept still processes it is possible to take a Bicycle wheel, spin it to different speeds in the hands and try to tilt in different directions, the effect will be entertaining. =))
Accordingly, the wheel with a large radius is more difficult to spin the motor, but, meanwhile, it has great gyroscopic effect.
But such wheel at low speeds easier "catches" the precession, when the rotation speed is small for its rapid stabilization and it begins to "sausage".
This process often occurs on the front wheels of motorcycles. when the precession of the wheel through the fork and the wheel transmits to the hands of the pilot oscillating movement. To mitigate fluctuations put the dampers.
Especially strongly affected by the precession not ambulancewoman wheel!
I think wheels with a large radius should be used for high-speed tracks where a greater gyroscopic effect will give more stability to the wheel and car in General.
Wheels with smaller radius should be used where the gyroscopic effect is not so noticeable because of stichnoth track, but it's faster to spin the wheel faster to accelerate.
The word wheel when zavalena castor return to straight position, due to the gyroscopic effect of the wheels and not through castor. Castor only fills up the wheel, changing the angle of tilt and the gyroscopic effect when rotating tends to return to its original position and because of it the steering wheel becomes heavier with increase of speed, the effect increases!
Separately want to highlight the brakes. Wheel with a large radius is more difficult to block because of the greater energy of rotation, and that means you can brake later and more aggressively.
Small wheel, in turn, easier to block and slow need to start early.
In General, choose a weight discs necessary for the track, the pilot motor.
Everything, everything, done clever. =))
PS don't forget about the law of balance! Reducing the radius and weight of the wheel, we, in turn, reduce the gyroscopic effect of the wheel easier to lock.
in the case of cars on the ease/gravity locking the wheels the main importance is the friction force, i.e., the hook between rubber and road. Most clearly, all these points are felt on the bike. Try to put light wheels, for example, from dassera, and then on MTV. The difference will be significant and in braking and acceleration.
First, the wheel is the flywheel, and then nepotushennaya weight for weigh you're not spinning the wheel, which is in the process of moving, actually, has a momentum has a kinetic energy and gyroscopic effect.
What is the flywheel we all know. The main component of the angular momentum.
Angular momentum — the amount dependent on how much mass is rotating as it is distributed about the axis of rotation and the speed with which the rotation occurs.
The observed gyroscopic effect is precession of the axis of rotation around its original direction when the external force does not coincide with the direction of the axis of rotation.
The concept still processes it is possible to take a Bicycle wheel, spin it to different speeds in the hands and try to tilt in different directions, the effect will be entertaining. =))
Accordingly, the wheel with a large radius is more difficult to spin the motor, but, meanwhile, it has great gyroscopic effect.
But such wheel at low speeds easier "catches" the precession, when the rotation speed is small for its rapid stabilization and it begins to "sausage".
This process often occurs on the front wheels of motorcycles. when the precession of the wheel through the fork and the wheel transmits to the hands of the pilot oscillating movement. To mitigate fluctuations put the dampers.
Especially strongly affected by the precession not ambulancewoman wheel!
I think wheels with a large radius should be used for high-speed tracks where a greater gyroscopic effect will give more stability to the wheel and car in General.
Wheels with smaller radius should be used where the gyroscopic effect is not so noticeable because of stichnoth track, but it's faster to spin the wheel faster to accelerate.
The word wheel when zavalena castor return to straight position, due to the gyroscopic effect of the wheels and not through castor. Castor only fills up the wheel, changing the angle of tilt and the gyroscopic effect when rotating tends to return to its original position and because of it the steering wheel becomes heavier with increase of speed, the effect increases!
Separately want to highlight the brakes. Wheel with a large radius is more difficult to block because of the greater energy of rotation, and that means you can brake later and more aggressively.
Small wheel, in turn, easier to block and slow need to start early.
In General, choose a weight discs necessary for the track, the pilot motor.
Everything, everything, done clever. =))
PS don't forget about the law of balance! Reducing the radius and weight of the wheel, we, in turn, reduce the gyroscopic effect of the wheel easier to lock.
As the article in General))) the Dependence is wheel weight and acceleration, but the obvious is not 1-10)))
I have 235/35/19 tires Hakka z according to the table, she should weigh 10 kg I weighed in my life she is 13 kg why such a difference? Table about...
I do not understand what kind of math do you) change weight 1kg neravnotsenno 3 and 10
You're reduced to 26 and received at 97.6 and 370
And was supposed to get 78 and 260,what is the secret?)
Compared weight 14 stamp TZSK =6.8 kg and 14 forging VSMPO "Solaris" = 5.0 Difference was 1.8 kg per one wheel.
Clock is a mechanism by definition and theory . In practice, this machine on the battery . Same with the wheels . What's the point to draw a cart on a spring . Calculate how much weight is all unsprung mass including the wheel hub-brake -levers — in short everything that is between the strut and the fastening of levers to the beam . The weight change of all this on a half or even two pounds -any ride will not change .
About the dynamics of acceleration, perhaps, but only weak engines and a tenth of a second . More reduces the acceleration and forward tire width and not its weight .
And Prachatice called the radius of the wheel size, is the size of the openings (holes) inside the tyre = internal bore DIAMETER . And have a rim diameter under the bus = xx inches .
And radius do not measure the hole circle . The tire radius is, by definition, no-because the center of the circle is not marked and measure only the inside diameter . If you really need the radius is =divide it in half, but why is it needed ?
And it is not clear what becomes the head corner radius, or mass. If two disks with the same radius and different masses, then what will be the balance?