"Mitchell Holman" wrote

They are anti-matter nacelles.

Just smaller versions of what you see on Startrek ships.

A very helpful answer, thank you. :-)

This very small aircraft as another picture shows does fly.

Those things look more like oversized hair dryers to me.

This link does show real propellers.

http://en.wikipedia.org/wiki/CriCri

Another link explains that real jet engines can be used although they are
quite tiny.

Google: Cri-Cri F-PZPR

I wonder about the safety of this contraption.