You mean... helicopters? Because they already exist and have limited use cases.
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http://www.dailymail.co.uk/sciencetech/article-4444874/Uber-...
https://www.theverge.com/2018/2/1/16961688/airbus-vahana-evt...
http://www.ibtimes.com/google-founder-larry-page-funding-fly...
Etc
I don't know how seriously to take all these projects, but they are clearly quite different to helicopters.
You mean... helicopters? Because they already exist and have limited use cases.
reply