Dirigable

Tell me how it is that, in this day and age, we still don't have the technology to create personal dirigibles.

I've been thinking about those old competitions people used to have that involved a single person, their crazy, mad-cap contraption and a long drop into a body of water.  All those attempts to make personal, one-man airships...  Why have none of them ever lead to us being able to take our dirigibles out for a spin?

We have motorcycles, ski-doos and jet-skis.  Why can't we have personal dirigibles?  How hard can it be to make a little one-person airship? 

Sure the practical applications of dirigibles have long since disappeared, but surely they are ripe for entertainment possibilities?

It's not like they would to go particularly high to be worthwhile.  If they can clear the trees, then great.  If they can't, people will just take them to parks, fields and beaches to play with them.

Oooh, I just had a vision of a dirigible park.  Can't you imagine it?  A wide open space full of people swooping around in personal airships...