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Re:Snap’s Rise and Fall: How a Big, Splashy IPO Prompted the... by TylerE on Saturday November 11, 2017 @08:23PM (#15679163)
> start a new car or airliner manufacturer since the 1920s (except for Tesla

  Porsche (1931)
  Nissan (1933)
  Volkswagen (1937)
  Toyota (1937)
  Kia (1944)
  Hyundai (1947)
  Honda (1948)
  Land Rover (1948)
  SEAT (1950)
  Lotus (1952)
  Subaru (1953)
  Lamborghini (1963)
  Dozens of Chinese companies in recent years...
On the aero side:

  Antonov (1946)
  Embraer (1969)
  Airbus (1970)
  Diamond (1981)
  ATR (1981)
  Cirrus (1984)
  Bombardier (1989)
These lists are very far from inclusive.
Re:Snap’s Rise and Fall: How a Big, Splashy IPO Prompted the... by cft on Saturday November 11, 2017 @09:53PM (#15679413)
A lot of these companies are government (or at least government-backed) projects: VW, Embraer, Antonov, Airbus, SEAT, etc. And Japanese situation after WW2 was special. It's like saying that healthcare.gov is a new upcoming web giant.
Re:Snap’s Rise and Fall: How a Big, Splashy IPO Prompted the... by pcurve on Saturday November 11, 2017 @09:22PM (#15679349)
Bombardier bought airplane mfr that was founded in 1940s. Airbus was just pooling of several air companies and expertise in 1970. ATR was founded and backed by another plane company. Etc...

I think your list shows how difficult it is to start a company in these two sectors .