Read here - go to "news" and look at the still pictures and the video
DesignYourDreams | Designing and creating a prototype of a
The "rider" is a dummy, and looks very lightweight.
The "bike" is basically a frame stuffed with LiPo batteries, with wheels at either end.
I'm going to guess that dummy plus the "bicycle" specific components (wheels, fork, pedals, handlebar, saddle, etc) weigh 30 lbs.
So basically, the lesson is that a 15 foot long electrically powered helicopter can carry a payload of 30 lb for a couple of minutes.
Impressed?