This exactly. Some
Airships R/C scale 1/4 have something about 10 meters of size.
Nothing badly if to consider that some with full power reach
30 Km/h. There are two types of airships: indoors and outdoors.
Indoors is for flights only in inwards, or either, gymnasia,
plants, etc. Outdoors is for flights in opened spaces, but
with calm wind and without turbulence, or either, sky of Brigadier
General. Rotational engines assist in the fluctuation and
also in the horizontal shift, it stops backwards or for front.
They use helium gas , that inflates a composite structure
of poliester, covered for an covering of dracon, like the
real balloons. Its sustentation is originated by the horizontal
movement of the airship or by the movement of the engines.
Or either, to go down the air stream it is guided for top,
to go up, the engine is deviated to order air for low. When
one of its is sped up two engines, the airship makes a curve.
The most amused is that with an airship, you can stop, go
backwards, closed curves and up to one stol.