Comments by "seneca983" (@seneca983) on "Why Helicopter Airlines Failed" video.

  1.  @KuraIthys : "1/4th the lifting power so balloon needs to be much bigger for a given payload" But that's not correct. Hydrogen has about 8% more lift for a given volume. Not a huge difference though big enough to have some importance, but still pretty far from the incorrect 2x difference that's sometimes posited (let alone 4x).
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  2. "just use commuter blimps" I remember from some documentary that some of the early pioneers of air travel used to make his commute by a blimp that he had constructed. Unfortunately, I don't remember who it was. I think it was some French guy (Henri Giffard?).
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  3. Here in Finland, there was a helicopter airline named Copterline that flew passenger flights between Helsinki and Tallinn in 2000-2005 with two Sikorsky S-76 helicopters. It was a much faster way to travel than by a ferry though also more expensive, I imagine. However, in 2005 one of the Sikorskys suffered a malfunction soon after taking off and fell into the sea killing both pilots and all the passengers and the company sold the remaining one next year. https://en.wikipedia.org/wiki/Copterline
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