Why 0.45 Gy.Jr?

1954: “stand-off” bombs. Blue Boar chopped, Blue Steel, 100nm. range, initiated. More range for a successor would need a light turbojet. RAE was leading all this, as MoS had no faith that industry could cope with its aeroplanes and take on long range ASMs. (ex-Power Jets) NGTE saw DH Gyron as lighter than, say Olympus; MoS saw DH as more “spare” than ASM/Bristol/RR. The down-size was driven by the ASM berth (funding); Blackburn then plugged it into NA.39 hole. In Bristol T.188, as wet PS.50, it soon so diverged as to be a discrete type.