Here is a fascinating extract from Rose Wilder Lane’s Discovery of Freedom
The bows of ships had always been bowls. They floated, they rose to the tops of waves; they stayed on the surface of water. They were safe. The Rainbow’s bow curved inward; the prow was as sharp as a knife. It would cut into the water; with wind in the sails it would drive headlong to the bottom of the sea. Sailors looked, and backed away. Sail, on a thing like that? straight to Davy Jones’s locker?Griffiths did not intend this ship to rise on the waves. Every rise and fall was a loss of speed. He designed the Rainbow to slice straight through the waves and keep going, fast.