Celebrating 20+ years! This shuttle was introduced at Convergence in 1996. The concept is mine, but the actual design is copyrighted by Terry Lavallee at Bluster Bay Woodworks, who makes them for me.
Actually the concept is not new, but has not been in use for over 50 years; the wooden bobbins you see in antique stores were filled with freshly spun yarn on a spinning mule, then went directly into shuttles for weaving. When the weaving industry developed shuttle-less looms, the practice went by the wayside.
Handweaving boat shuttles that hold bobbins today have a rod that is not removable. This shuttle was developed without the rod in order to hold the charkha spindle so you can take your handspun directly to the loom.
Yes! you can weave with singles; khadi in India is made with singles in both warp and weft, and most commercial fabrics are woven with singles in both directions as well.
The shuttle was designed for the book charkha spindle; the aluminum yarn stop is 7/8"/2.3 cm in diameter. Yarn stops larger than this will rub on the bottom of a closed bottom shuttle, so it is best to order an open bottom shuttle if you have yarn stops an inch or so in diameter.
Go here to find exercise books to help you get started.