The B707 and the Russian equivalent, the VC10 ditto, wasn't the BAe146 supposed be be 2 engines whilst Antonov have achieved it, the B727, the DH121 and the TU154, the BAC1-11, the DC9 and the TU134, the Fk27 and the AN24, the C5 Galaxy and the AN124, the B757 and a Russian equivalent ... All of these are just too much of a coincidence that one party isn't copying another!