Thrust and behavior

The error of thrust angle value on automobile is permitted within plus minus 10 minutes(angle) in European Automobile Safety Standard. Strange report from VW Japan AG contained the permitted thrust angle value plus minus 20 minutes, how come? Why changed into big tolerance as twice only in the models for Japan? The newly produced model but in the condition, being out of European standard are exported to the poor country without checking standard, to Japan? Because another adjusting procedures invite more production costs, they export ill wheel aligned new models to another country except to Europe.

I wrote the wheel alignment adjustment on BC7 SUBARU Legacy LSi US model. The error of thrust angle was not 40 minutes but 40 seconds(angle value). The distance scaled on handle column was about 3mm between two centric steeling positions while straight running.

Though the physical phenomena based on some error are already reported in Web site, the relations between the magnitude of the errors and the resultant behaviors are not shown enough.

Actually the reaction, self-steer covers and automatically adjusts all of the ill settings on wheel alignments, and at the speed below 100km/h, no sensitive adjustment is required in slow traffics like in Japan. This is why the ordinal drivers in Japan may be indifferent to the negligence of the car producing company.

But in high speed condition like in Germany Autobahn, precise wheel alignments are indispensably necessary for the traffic safety.

As walking with restless dog is tiresome, so an ill wheel alignment set automobile invites nervous fatigue after a long driving.

The reason for unpleasant results are caused by sudden and unintentional adjustment of connecting chain or steering adjustments required without any previous notice.

Any way a continuous concentrations to something obliged without own choice preparing some stimulations occuring without previous notice is boring, I wanna run away to my own tent from such circumstances,if possible.