From http://www.physicsforums.com/showthread.php?t=2805 It looks like there's more info on there, and links.
music exends it's reach even here . at least the foo fighters aint bad like a german drawing board ufo
when did we or anyone ever make a working flying saucer?..iirc there was a ducted fan thing that hovered in ground effect ,early 60s?...it seems to me that except for gas bags all working aircraft have wings and a tail...
the avrocar was basicaly a flying saucer....really low flying but it flew...until the government trashed it like they did the Arrow.
A couple of feet I think. Enough to make it tippy. But yeah basivbasically a hovercraft without the skirt just a ducted fan (probably more than one)
so back to the basic fact...to have a practical flying machine one needs wings and a tail...there are no flying saucers ....being piloted by humans
everybody had a proto type flying wing ...none ever were produced because lacking a tail they were all horribly unstable and usually ended up smeared all over some hill or farm field...
dang ,black, a flyin wing WITH controls is a biotch to control...one built without controls would be kinda hard to sell to the taxpayers and i bet the test pilots would hate it....
v1s , of course had some type of self leveling device or everyone of them would roll into a steep dive and fireball within sight of the launch ramp...a perfectly balanced model plane can fly staight and level if you can fly it indoors ..ie a huge indoor stadium