>>998432So it's basically WW2 that was the deathblow of the Airship. Combined with the fact that WW2 lead to the construction of thousands of airfields all around the world.
If ww2 had not happened the Graf Zeppelin II would've been filled with Helium. Zeppelin engineering would've continued well into this day. In fact, I think Zeppelins would've been the primary mode of air passenger transport up to the 1960's / 1970s if ww2 had not happened, because around that time the amount of airports and airplanes would've increased to a degree that gigantic Zeppelins became redundant for efficient travel. Still, they would not have dissapeared like today. In fact, there would've probably been a few Zeppelin liners still in existence as the size of the Graf II providing world wide air cruises for a niche market. Sadly, HITLER fucked up everything, including the white race