Quote:
Originally Posted by Rupert
1940 is decent, working, military radars. Primitive but useful ones date from the 30s.
As for jets, 1940 is just about the point flight-worthy jets started being produced, and the mid-point of the first turboprop's production run.
It's also the point where penicillin was shown to be producible in useful quantities, though mass production didn't start for a couple of years.
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https://en.wikipedia.org/wiki/List_o...f_World_War_II
...has no manned jet aircraft with an "entered service" date before June 1944.
As to the first turboprop's production run......
https://en.wikipedia.org/wiki/Vickers_Viscount
....has the Vickers Viscount not even flying until 1948.
Doesn't look much like 1940 to me.