http://realitypod.com/2013/02/worlds-first-aa-battery-powered-plane-makes-successful-flight/

though it is a past news, but it is remarkable. the era is changing... we are converting to electrics..we have seen so many examples of manned airplanes, not powered by IC engines.
an solar powered flight, a speedy electric flight using lipos, etc..

also found these. i think these are worth sharing

we have bee trying electric flight since a long time
http://en.wikipedia.org/wiki/Electric_aircraft
http://www.eaa.org/news/2011/2011-09-08_heli.asp

also refer the images. i think the image can inspire someone on forum to make a solar plane..