other payment options acceptable to Ebay's Payment Policies. csm 04-28-08/pic 11-19-11 jlc Myasishchev M-50 The Myasishchev M-50 ( NATO reporting name Bounder ) was a Soviet prototype four-engine supersonic bomber which never attained service. Only one prototype was built, which was believed to have first flown in 1957. The M-50 was