Overpowering
Milt
As a Rolls-Royce test bed for the bypass engines that would eventually power the Victor B2 and VC10, VX770 was flying with Conway 11s rated at 17,500lb thrust. As you say, it probably exceeded 415kts by a goodly margin. Ironically, the airframe broke up at the very point on the wing leading edge which Avro tests in 1950 had shown to be the weakest party of the structure. You were lucky.