Since the 1920's when the first "rocketpack" was introduced by Buck Rogers, science fiction groupies and futuristic dreamers have loved the idea of a jetpack, myself included. My question is this, and I have been thinking of ways to do it: is it possible to build a working jetpack?
I know there have been previous working models, so here are some criteria:
1. Would be capable of extended flight times
2. Would be capable of producing enough thrust to lift 10-20m