Aviationluver,
Wikipaedia is correct, as is Microburst. You just have to be consistent with the units.
I.e. if you want metres for the radius you must use metres per second for v and metres per second squared for g.
If you want the radius in Nautical Miles you must use Nm per second (!) for v and Nm per second squared (!!) for g.
If you really have to use Kts for speed (Nm per hour) then you'll also have to use Nm per hours squared for g (!!!)
As I say, you MUST be consistent with the units in the formula.
Good luck
