One of the items I identified in yesterday's post about the latest issue of Sport Rocketry was a talk about amateur rocketry by Bill Colburn. A reader kindly pointed me to the LUNAR club's NARCON 2013 page, which includes links to videos of the technical presentations. The one that interested me most was by Bill, who has been an amateur and professional rocketeer for over 60 years. He's also considered to be the inventor of the first sugar motor and has contributed to major projects, including Apollo. This is long, but worth watching.