you reckon that one is cool, check these mini turbines out! About half the size of those ones.
www.lambert-modellturbinen.de/
and heres a vid of a foam model plane with one installed. Very very fast.
just skip to halfway if u get bored by models n stuff 
I fly RC planes and love the sound and speed of turbine jets, but with a price tag of between $10000 and $25,000 to build one is a bit out of my price range. Plus you need permits to fly them and they need to be inspected yearly.
I think it was Rick Kelly from the V8 supercars, he was trying to build a rc car with two 40 pound thrust turbines in it to have a crack at the world record. Have a look on youtube for it funny
theres a dude who flys a twin jet mini boeing 747 at Elwood.
its big and sounds fantastic, but not that fast....well not as fast as that german mini fighter !!!!!
