REPLACED rFactor 2 Build 300 Released

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Tim Wheatley said:
We've also started to implement a new constraint system (which is used in the upcoming historic Howston cars), that allows many new physics features, such as chassis flex. Most importantly, this system allows suspension geometry and wheel rates to be more accurate than the old model was able to simulate. This system adds complexity and accuracy, but has already been optimized, with no notable additional CPU usage. Of course older cars will be updated in the future, and new cars will use the new system going forward. Fortunately, it's quite easy to convert... Documentation will follow.
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How is those documents going Tim?
 
for the layman what does chassis flex actually do? Should I see anything different in replays? Does the vehicle mesh twist and flex? I do not really understand the benefit of this new chassis flex? Can someone explain it? Thanks.
 
You don't see chassis flex. It's part of the physics model. Race car engineers design their cars to have as less chassis flex as possible. I think modern race cars have almost no chassis flex.

For karting I believe chassis flex actually helps the kart turn.


Disclaimer. I could very well be wrong here so feel free to correct me. :)
 
You might notice that changing alignment settings has less effect now. Also I don't think you'll feel any loss of sharpness on consumer hardware.

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o0thx11380o said:
for the layman what does chassis flex actually do? Should I see anything different in replays? Does the vehicle mesh twist and flex? I do not really understand the benefit of this new chassis flex? Can someone explain it? Thanks.
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From Wiki
Body flex is a lack of rigidity in a motor vehicle's chassis. It is often something to be avoided by car manufacturers as higher levels of body flex is a sign of structural weakness, and means that the vehicle's suspension cannot work as efficiently - the body takes up some of the 'slack', rather than the parts of the car which were specifically designed for this purpose. A chassis that flexes may be prone to fatigue and further "softening" with use will eventually result in failure. Cars of a sporting nature are, therefore, often very 'stiff', while convertibles or cabriolets are not often considered to be good candidates for high-performance sports cars because of their lack of a rigid roof.
Although, for some time, body flex was a result of attempts to keep a car's weight down, makers such as Audi (the A8), and Jaguar (with the 2003 XJ8) have employed the use of aluminium in chassis production to get around this obstacle, ensuring the weight of these cars and their level of body flex can both be kept to a minimum.
Typically, the stiffness of the body is measured in torsion. The body is supported at the spring caps at the rear, and then a torque is applied to the front spring caps via a long beam and a fulcrum. Values achieved range from 1,000 lb·ft (1,400 N·m) per degree for pre-War racing cars, up to 25,000 lb·ft (33,900 N·m) per degree for some modern production vehicles.
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o0thx11380o said:
for the layman what does chassis flex actually do? Should I see anything different in replays? Does the vehicle mesh twist and flex? I do not really understand the benefit of this new chassis flex? Can someone explain it? Thanks.
Click to expand...

Don't know if it is possible to see, may extrem soft body cars or parts of it with greater indulgence make it visible, depending on the degree of simulation and visuals. But I think it's more about the torsion around the longitudinal axis because it influenced the suspension behavior as well as sway bars effect and therefore the contact surface. I guess this can adversely affect driving dynamics strongly but probably also depends on the accuracy of the entire simulation, in how far it has influence and how good it works.
 
Jamie Shorting said:
For karting I believe chassis flex actually helps the kart turn.
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Correct: Go Karts have a solid rear axle, which makes both the inner and outer rear tyre move at the same speed through a corner. The outer wheel however, travels a greater distance, so excually should move quicker. Because that isn't possible (as said), the rear wheels are 'pushing' the kart forward (understeer), or they will spin very easy, causing you to lose speed or have an accident.

If you use the proper technique and/or go fast enough the chassis will flex, lifting the inner rear tyre off the ground. When the inner rear wheel if off the ground, it doesn't matter what speed it is moving at, it won't push your kart forward or spin. So that makes the kart way more stable.
 
speed1 said:
Don't know if it is possible to see, may extrem soft body cars or parts of it with greater indulgence make it visible, depending on the degree of simulation and visuals. But I think it's more about the torsion around the longitudinal axis because it influenced the suspension behavior as well as sway bars effect and therefore the contact surface. I guess this can adversely affect driving dynamics strongly but probably also depends on the accuracy of the entire simulation, in how far it has influence and how good it works.
Click to expand...

GTClub_wajdi said:
From Wiki
Click to expand...

Adrian said:
You might notice that changing alignment settings has less effect now. Also I don't think you'll feel any loss of sharpness on consumer hardware.

Sent from my Nexus 4 using Tapatalk 4
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Jamie Shorting said:
You don't see chassis flex. It's part of the physics model. Race car engineers design their cars to have as less chassis flex as possible. I think modern race cars have almost no chassis flex.

For karting I believe chassis flex actually helps the kart turn.


Disclaimer. I could very well be wrong here so feel free to correct me. :)
Click to expand...


Thanks for the info guys :)
 
Anyone with any suggestion about why "developer" is greyed out in the launcher after a re-install of this build? Not because I use it, I just wonder....


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its something wrong with tires pressure
center part of the tire always hotter then inner (no matter u do with pressure or other setup settings) and especially outter (its to cold) (motec telemetry). this happens especially on front tires - rear ones too but not so much ass front (marussia, FISI)
also i think tires temperature is something strange one - a can see on telemetry sometimes it may be 300 degrees (its not realistic at all) and often over 160-200...
 
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