[Takahashi, Sato, Horiuchi]

1. Set the height of secondary coil to -20mm.
2. Calibrated the LVDT in the F0 (plot1).
3. Measured the rage of FR (plot2).
4. The height of F0 keystone was -19.0mm with the ballast (25 +5x5 +1.8 +0.5 = 52.3kg).