Lightweight power source for two 2' diameter propellors

[Andrewlackey]

Hey everyone!

I am designing an experimental, manned aircraft that uses twin caged propellors for VTOL, and I'm looking for a lightweight, high-output power source to power them. Any ideas?

 

[mfb]

Manned, and two 2' propellers?

Batteries? Capacitors have a higher power output, but their capacity is bad.

http://en.wikipedia.org/wiki/File:Power_vs_energy_density.png