Heavier. The article is about an hybrid vessel that uses helium to decrease its weight but is still heavier than air. I'm not a physicist, but I assume that lighter than air objects tend to have more wind resistance than heavier than air objects.

> lighter than air objects tend to have more wind resistance than heavier than air objects.

They have a larger cross-section relative to their mass than heavier than air vehicles. The larger the cross-section, the larger the force wind exerts on it.

Oh, I get it now.

The idea of heavier than air but lighter than deadweight seems to be a worthy compromise to explore but of course, if the engines fail or it runs out of sunshine/fuel, it will not be able to stay up very long, just like any other heavier-than-air aircraft.

Lest anyone brings up skilled gliders, I don't think with its wind-resistance this craft will glide for long either.