This video gives you an introduction to the fascinating world of helicopter-recovery rockets. There are many different types of helicopters, and I'll show you a few of the different ones that I've come across in my journeys in rocketry If you asked me what is my favorite kind of rocket, I'd say it was the helicopters because they go fast like a rocket, but then they magically transform at apogee into something that operates completely different from a rocket. When the blades deploy, the rocket starts spinning down in a slow manner for a safe descent so that the rocket can be flown again and again. There is something unique about autogyro rockets, as they are technically known as, that makes spectators squeal with delight.