Why not?
Add a fin to a baloon and you can steer it.
And once the baloon can hold direction in the wind with the help of the fin, you can add sail to actually get some propulsion in direction other than wind.
Add a fin to a baloon and you can steer it.
And once the baloon can hold direction in the wind with the help of the fin, you can add sail to actually get some propulsion in direction other than wind.
There is no keel on a balloon. Without a keel, one is only going downwind.
Mind == blown*
*Sincere, but pun intended