Re: [Flightgear-devel] Abnormal surface friction factor

[Dany <da...@nu...>]

@wlbragg, to summarize a bit more:

Erik Hofman wrote
> Ah, that one I remember: it's to normalize rolling friction values to 
> that of rubber tires on asphalt. So yes, it's intentional.

> This would allow a different friction factor for different terrains 
> while preserving the possibility to set the friction coefficients in 
> the JSBSim configuration file. 

1- The 50 factor from (geodinfo) rolling_friction ---> (FG) 
rolling_friction-factor is not deleterious, it is a tool for 
normalization. Applied to every terrain material.

2- This normalization factor allows the rolling coefficients of 
different materials to be taken into account (proportionality), while 
leaving control over the final rolling friction coefficient, which is 
also proportional to the value given in the FDM (rolling_friction).