I launched the new YouTube Channel “Akiyuki Brick Lab” .

I upload videos of my models in Akiyuki Brick Channel and I show some experiments in Akiyuki Brick Lab.

I uploaded following two videos.

Lego: An attempt to distinguish soccer and basketballs by their rolling traits
I try to sort the two kinds of LEGO balls, soccer balls and basketballs, without a light sensor.
Rolling-down speeds of the balls depend on their groove features.

Lego: Which is the strongest axle? (torsional stiffness test)
I compared the torsional stiffness of five Lego axle samples.