Bowstrings

I've got this project to make a longbow, string and arrows from first principles but am having trouble with the string. Anybody know a method to twist in short lengths of hemp or flax to make a thread which is long enough (and strong enough!) to use on a string jig? The standard two ply "rolling on your leg" method seems to untwist if you then try to join two of the threads together.

Any ideas?
 

BCUK Shop

We have a a number of knives, T-Shirts and other items for sale.

SHOP HERE