B1-(also called T1), normally 430.. 480 Hz

This strongly radiating mode has predominantly long-grain bending of the back and cross grain bending of the front. Frequently the g-side C bout moves in the opposite direction to the g-side bridge foot.

Again, the grid shows maximum movement, while the colors show areas of maximum bending; cross-wise, lengthwise and then twisting.

B1- with X (cross-grain bending)

B1- with Y (long-grain bending)

B1- with twist.