*** Motorcycle-Video-Thread ***

[HornetMaX]

This is why I'm wondering if the current tyre model is sufficient to very accurately model deformation of the tyre and therefore contact patch size on a motorcycle?

The tyres are a crucial link in the chain of how a bike handles, that is why I question the tyre model in GPB because the tyres don't seem to me to be reacting how they should in real life right now in my opinion?

It would be nice to see the deformations graphically in the tyres as we ride the bikes(like rFactor2 has for the car tyres), but that is not required to actually have them deforming mathematically in the programme physics.... so I'm just wondering if the "Magic tyre formula" does actually calculate tyre deformation and the varying resultant contact patch size?

But if there is still physics changes that need to be made or tweaked in GPB then this is maybe what is making me doubt the GPB tyre model.  Let's see what Beta 8 brings.

First off, WRS is showing visually the tyre deformation (sprint car) and it may be that GPB does it / will do it too, at least in a simplified manner.
But don't mix what you see visually in GPB with what is done internally.

The Magic Formula does not calculate tyre deformation or contact patch size. The two things are included in the empirical model the magic Formula provide (as a proof, the MF depends on the tyre vertical load).

The Magic Formula ir more or less a "black box" approach: you measure the output stuff (longitudinal force, lateral force, twist momentum) under different conditions and you create a semi-empirical model out of that. You don't really care about all the intermediate details (like contact patch size or tyre deformation).

So yes, the MF keeps into account patch size and tyre deformation, even if visually you may not be able to see it.

[Hawk]

This is why I'm wondering if the current tyre model is sufficient to very accurately model deformation of the tyre and therefore contact patch size on a motorcycle?

The tyres are a crucial link in the chain of how a bike handles, that is why I question the tyre model in GPB because the tyres don't seem to me to be reacting how they should in real life right now in my opinion?

It would be nice to see the deformations graphically in the tyres as we ride the bikes(like rFactor2 has for the car tyres), but that is not required to actually have them deforming mathematically in the programme physics.... so I'm just wondering if the "Magic tyre formula" does actually calculate tyre deformation and the varying resultant contact patch size?

But if there is still physics changes that need to be made or tweaked in GPB then this is maybe what is making me doubt the GPB tyre model.  Let's see what Beta 8 brings.

First off, WRS is showing visually the tyre deformation (sprint car) and it may be that GPB does it / will do it too, at least in a simplified manner.
But don't mix what you see visually in GPB with what is done internally.

The Magic Formula does not calculate tyre deformation or contact patch size. The two things are included in the empirical model the magic Formula provide (as a proof, the MF depends on the tyre vertical load).

The Magic Formula ir more or less a "black box" approach: you measure the output stuff (longitudinal force, lateral force, twist momentum) under different conditions and you create a semi-empirical model out of that. You don't really care about all the intermediate details (like contact patch size or tyre deformation).

So yes, the MF keeps into account patch size and tyre deformation, even if visually you may not be able to see it.

That's good to know. Thanks for the info Max. 

Hawk.

[Vini]

Still, would be nice to have a bit more visual effects.
http://gfycat.com/PowerlessFlakyGrackle

I also think that the grip on the (rear) tyre edge is too big compared to the rest of the tyre.

[HornetMaX]

Still, would be nice to have a bit more visual effects.
http://gfycat.com/PowerlessFlakyGrackle

Well, the visual part of GPB is not really top notch in general

But as far as the tyre behaves correctly physically, I don't care too much if visually it doesn't deform, it's just eye candy.

I also think that the grip on the (rear) tyre edge is too big compared to the rest of the tyre.

That's something that could be tackled. Validity of the magic formula (the version used) at high lean angles is something that is sometimes questioned.
And there're some weird things in the current calculations that I reported a long ago (http://forum.piboso.com/index.php?topic=1922.0).

[doNico]

https://www.youtube.com/watch?v=NsZKmbXJdcw

Suter mmx 500... The real deal. Lovely aye??!!

[Vini]

reported a long ago

[Napalm Nick]

http://youtu.be/NsZKmbXJdcw

Suter mmx 500... The real deal. Lovely aye??!!

Aye man sweet.

[Hawk]

http://youtu.be/NsZKmbXJdcw

Suter mmx 500... The real deal. Lovely aye??!!

That's what we like to see and hear! Shame we can't smell it too! Hehe! 

The fairings could've been better designed though in my opinion, but I'm old school. 

Hawk

[matty0l215]

http://youtu.be/NsZKmbXJdcw

Suter mmx 500... The real deal. Lovely aye??!!

That's what we like to see and hear! Shame we can't smell it too! Hehe! 

The fairings could've been better designed though in my opinion, but I'm old school. 

Hawk

You already know the answer for that

[doNico]

https://www.youtube.com/v/NsZKmbXJdcw

yay ... there we go...

btw, this one is built like 90km far from me

https://www.youtube.com/v/xX6_LlXtt48

[Vini]

Yes, that's how a racing bike is supposed to look
And the Ronax is actually 500cc but sadly a little bit underpowered.

[LOOPATELI]

I guess you all have seen this video, but I post it anyway. Simply amazing this technique, sliding both wheels at the same time


https://www.youtube.com/v/NylIcbXeqZc

[Hawk]

Not bad at all Loopa, but I prefer to watch Speedway Racing..... No brakes, faster and more exciting! 

https://www.youtube.com/v/F-z77W8UgZo

Hope it will be possible to create a Speedway bike(if physics allow) for MXB?

Hawk.

[tseklias]

Hawk, be cautious with ur uploads!

I picture Piboso sneaking in here to see what's more enjoyable these days. 

[CapeDoctor]

here's a bit of holiday chaos, two wheels vs four 

https://www.youtube.com/v/uoiVtXtS444

edit: watch at 7:19 - and you thought the forward view on some of the MotoGP mod bikes was bad...!