Quote:
Originally Posted by some_other_dave
Like I said earlier, the airship thing is a great idea. A neutral-buoyancy craft doesn't have to fight gravity. But to get to neutral buoyancy, most craft will have to be large enough that severe weather is a severe problem.
-soD
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That’s not a small problem. It reminds me of renewables to replace conventional electricity generation. It’s excellent when conditions are perfect, but conditions are hardly ever perfect.
There is efficiency of fuel, and there is efficiency of time, payload, schedule, versatility, etc.
Perhaps we don’t have airships because we’ve got a huge blind spot, or more likely it doesn’t strike the right balances of all the factors.