Chapter XX, Part Two

After turning and milling this piece on a lathe and mill using electricity, I became curious how mediaeval balistaria accomplished the same task with only manual tools. The remarkable thing is that brass is quite soft and easily turned, but Payne-Gallwey describes mediaeval bowmakers turning sockets and nuts from blanks of steel. It is difficult to imagine turning steel by hand, even with a so called “pole lathe.” The answer “turns” out to be simply mechanical advantage. Old lathes apparently used a massive wheel rotated manually at first and by water by the end of the seventeenth century. Here are some links on the subject:

said on 25 Oct 2010 at 07:08 AM

Please visit my [url=http://www.dordztwo.sklep24h.beskidy.pl/a/Uzywane-Audi,3509]site.[/url]

Regards

said on 10 Nov 2010 at 04:40 AM

sainulubculse

of the uterus[/url] enlaccelt
sayeth as follows:

* do fancy stuff in your comment.