This is the Formsprag Clutch Application Manual for Overrunning Clutches.
It will teach you everything you don't already know about sprag clutches and allow you to choose the proper sprag clutch for your application, from bicycles to motorcycles to cars and trucks. It is such an excellent resource that I printed it out, all 52 pages, and mounted it in a 3-ring binder. Then I slobbered all over it. Joy! Oh, joy! It's an ecomodding miracle!
http://www.formsprag.com/litportal/pdfs/P-1052-FCLO.pdf