"Astrodynamics without the mathematics - how to fly spacecraft" -  John Cooke GM8OTI

Summary: "We send a lot of stuff into Earth orbit, and (more interesting) to other planets, moons and other objects in the solar system (and even beyond). As radio amateurs we know how to communicate with these probes - but how do we get them there, and how do we put them where we want them? This talk explains, without recourse to detailed mathematics - though lots of physics concepts are used, along with diagrams and demonstrations."




 (John is bottom-right).