Just for fun I will use my newly converted CNC lathe to make a 1:10 bombard. The original was cast in 1464 and was thought to be a close copy of the bombards which Mehmet 2 (“the conqueror”) used to breach the walls of Constantinople in 1453. There are several of these bombards still in existence, including one in UK, which was given to Queen Victoria by the then Turkish Sultan.
These bombards were last used, against the British, in 1807, when a British warship was holed with substantial loss of life. Pretty amazing for a 340 year old weapon.
My model will be about 520mm long. I would like to make it from bronze, or gunmetal as in the original. Any mistakes will be costly.
So I have decided to make a prototype in wood. That will test my drawing, the machining procedure, and the final appearance. Not to mention how the CNC lathe will handle the task.
I will use a very dense, tight grained Australian hardwood (red gum). The wood was salvaged when my house stumps were replaced with concrete. Some was used to make parquetry, and the rest was put aside for possible future use. Such as this.
I have used Ezilathe to generate the G codes.
to be continued….