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A comment on The Death and Life of Helicopter Commuting [video]. Parent comment

Re:The Death and Life of Helicopter Commuting [video] by Pulcinella on Wednesday August 30, 2017 @10:54PM (#15137846)
They are not "useless" for cars, just currently impractical. The problems are the catalyst requires rare, precious metals and, even using hydrogen, efficient fuel storage.
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Re:The Death and Life of Helicopter Commuting [video] by tarikjn on Thursday August 31, 2017 @03:00AM (#15138663)
Correct me if I am wrong, but AFIAK the efficient fuel storage issue has been solved with using Methanol/Ethanol (liquid at room temperature) instead of Hydrogen as a fuel.
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