What does aerostatic or aerostatical mean?
The definition of aerostatic and aerostatical
A`ër*o*stat”ic (, A`ër*o*stat”ic*al (, a.
Etym: [Aëro- + Gr. aérostatique. See Statical, Statics.]

1 Of or pertaining to aërostatics; pneumatic.
2 Aëronautic; as, an aërostatic voyage.