WG.17D 138 seat compound helicopter with 4 T64-GE-16 turboshafts and two Bristol Siddeley M45H turbofans.
6-8 seat tiltrotor, unknown project number
1973 study for a naval helicopter with supersonic rotors and 3 x Avco Lycoming LTC.4V1 turboshafts. Weight 33.500lb; 49ft 3in diameter rotors.
Derek James, Westland Aircraft since 1915, Putnam