Re: It's not really Linux
"More or less like UK gave Stalin the jet engines".
That is indeed a more or less simplified view of facts as they were sold to the Russians.
We copy and learn and eventually it's always open. As the Germans invented the internal combustion engine one could of course claim they gave it for free to the British enabling them to build the Merlin engine, that is, if one was very silly.
The British gave the Whittle engine to the Americans however.
This is a nice and old video of that occasion.
However the Whittle engine was not axial flow like the Junkers Jumo 004 the first successful axial compressor turbojet engine, the mother of the modern jet engine.
Some more about the MiG 15:
"The Germans had been unable to develop turbojets with thrust over 1,130 kilograms-force (11,100 N; 2,500 lbf) running at the time of the surrender in May 1945, which limited the performance of immediate Soviet postwar jet aircraft designs. They did inherit the technology of the advanced axial-compressor Junkers 012 and BMW 018 engines, in the class of the later Rolls-Royce Avon, that were some years ahead of the then currently available British Rolls-Royce Nene engine. The Soviet aviation minister Mikhail Khrunichev and aircraft designer A. S. Yakovlev suggested to Premier Joseph Stalin that the USSR buy the conservative but fully developed Nene engines from Rolls-Royce...."
"At the end of World War II, the Soviets seized many of the assets of Germany's aircraft industry. The MiG team studied these plans, prototypes and documents, particularly swept-wing research and designs, even going so far as to produce a flying testbed in 1945 to investigate swept-wing design concepts as the piston-engined "pusher"-layout, MiG-8 Utka (Russian for "duck", from its tail-first canard design). The swept wing later proved to have a decisive performance advantage over straight-winged jet fighters when it was introduced into combat over Korea.
The design that emerged had a mid-mounted 35-degree swept wing with a slight anhedral and a tailplane mounted up on the swept tail. Western analysts noted that it strongly resembled Kurt Tank's Focke-Wulf Ta 183, a later design than the Me 262 that never progressed beyond the design stage . While the majority of Focke-Wulf engineers (in particular, Hans Multhopp, who led the Ta 183 development team) were captured by Western armies, the Soviets did capture plans and wind-tunnel models for the Ta 183.[better source needed] The MiG-15 bore a much stronger likeness[according to whom?] to the Ta 183 than the American F-86 Sabre, which also incorporated German research."-
The Chinese gave us powder and I doubt they could have prevented it from becoming free and open.
We invent and copy and learn and improve stuff.