Kind of cool link courtesy of Jim Rutherford at the FAA Small Aircraft Directorate.




https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/47436d482fcd9d8b86257bcf006373cf/9d18a2c751ace00b86257beb00529fe2/$FILE/Basic%20Glider%20Criteria%20Handbook.pdf