That design later became known as the Mig 15.
There was a great show on the MIG 15 on Modern Marvels (History Channel) a couple of nights ago---did you catch it?
I saw a program on the History Channel a while back in which they claimed the British gave them the engine based on losing a pool game.
I thought at the time that was probably total nonsense. The British government was full of Commies. I suspect that is how they got it. Anyway they got the best jet engine in the world without doing any development work. We then paid the price in korea.
I wonder how original the Yak-28's design was. It looks like it has some Sturmvogel genes.