Thrusts adjusted

I have succeeded in establishing wheel alignment of two TOYOTA automobiles yesterday, though I was afraid of severe tasks for the purposes, a little efforts were enough to overcome them.
As I imagined, Altezza had minus thrust angle and toe out setting to be adjusted as left rear lateral arm shorter 0,40mm, actual measuring and calculations utilizing trigonometric function. I worked in a single attempt for SXE10. Of course some stable and unmovable steering reaction was obtained after that as to make me feel to continue this automobile much longer from now.

As for NCP10 Vits, also had minus thrust angle. At the beginning, rear axle construction with rigid torsion beam designing should make it difficult to be corrected at zero thrust, some idea made it very easy to do that. Just loosening rear right beam axle hinge bolt, side brake on and motor on with sift position o Drive, under this condition re-tightened the bolt. The trailing arm hinge bush would be fixed in 1G condition avoiding any stress while an automobile stands still on the ground and the compliance bush embedded in the trailing arm hinge portion should be positioned at the highest relation with the supporting bracket. So supported the body weight with the lever action of trailing arm design as a matter of fact. On the other hand, the compliance bush would be fixed in the most posterior position under the condition that stress by frontal wheels was born, to be precise, rearward and upward. As the result, the torsion beam axle would be twisted toward clockwise with this method.

The backlash clearance is smaller than 1mm at all, but this value is enough to perform physical change of thrust angle.
Marking on the steering column is a good indication to know an individual habit, the rate of resistance felt on the steering wheel and the position while straight running. This method has enough accuracy to observe the error of thrust angle of 4 wheel vehicles. It's very often the case that two steering wheel positions are observed while straight running if the driven automobile has thrust angle, the range is broader, the error is more ugly. This two positions steering phenomena is caused by  the offsetting effect of self steering action of frontal axle constructive design, caster, SAI and scrub. And the rate and balance of the action changes regarding on the road shifting back and forth, start and stop, hill climb and down. Consequently, I regard "Zero Thrust" when the steering centric discrepancy disappeared.