My home-made Bow Saw:

This saw was made from a bing cherry tree that died in our yard.  The size of the saw was
determined by the length of straight members that I could salvage from the small tree.  All of
the wood and metal working was done using hand tools (except blade, nuts and washers).  
No sandpaper was used.  The blade is a 26 inch length of a Starrett 1 inch wide, 3 tpi , hook
tooth bandsaw blade.

To see the other side of the saw and a blade connection detail click here.