## Re: [Speed-dreams-devel] Speed-dreams-devel Digest, Vol 19, Issue 20

 Re: [Speed-dreams-devel] Speed-dreams-devel Digest, Vol 19, Issue 20 From: Kristóf Kály-Kullai - 2010-04-28 17:46:02 Attachments: Message as HTML ```Hello Kennet, > The friction coefficients work together with the friction in the surfaces? > Yes, they are multiplied. > Are the friction and rolling resistance values somewhat correct there? > Seems the rolling resistance in the car.xml is never used, but in tracks looks right. I found it should be 0.01-0.015 for road cars on concrete, and we have something like 0.01-0.02 in different tracks, so that is OK. Friction should be like 1.0-1.5, whereas we have 1.3-2.0 in cars, multiplied by 1.1-1.4 in various tracks - I think it is too high. > The car loosing control when accelerating on a curb seems suspicious too > me. I do of course never lose control when driving, I only practice my fancy > driving... > My guess is it is mainly an issue with setups, for example the GP1600 is quite good on curbs, while for example the supercars tend to lose control. Kristof ```

 Re: [Speed-dreams-devel] Speed-dreams-devel Digest, Vol 19, Issue 20 From: Kristóf Kály-Kullai - 2010-04-28 17:46:02 Attachments: Message as HTML ```Hello Kennet, > The friction coefficients work together with the friction in the surfaces? > Yes, they are multiplied. > Are the friction and rolling resistance values somewhat correct there? > Seems the rolling resistance in the car.xml is never used, but in tracks looks right. I found it should be 0.01-0.015 for road cars on concrete, and we have something like 0.01-0.02 in different tracks, so that is OK. Friction should be like 1.0-1.5, whereas we have 1.3-2.0 in cars, multiplied by 1.1-1.4 in various tracks - I think it is too high. > The car loosing control when accelerating on a curb seems suspicious too > me. I do of course never lose control when driving, I only practice my fancy > driving... > My guess is it is mainly an issue with setups, for example the GP1600 is quite good on curbs, while for example the supercars tend to lose control. Kristof ```