What are Enligh galleons?

A galleon in Harry Potter is the coin that has the highest value in wizarding money. A Spanish Galleon ship is a large transport ship that had 3-5 sails, depending on its size that transported...

Wood and wrought iron, mainly, but also manila rope and canvas.

If the galleon's mast is shot it is rendered immobile and therefore is out of a fight if it's mast is shot also leaving it widely open to attack from other vessels.

it doesn't say but i kno that somebody invented

it was invented in the 1500's