planned vertical short landing fighter aircraft designed developed alongside smaller derived proposal meet consequently born capable aircraft retained chamber burning previously designed technical winner submissions follow testing production proceed result political strife considered modifying airframe joint specification aircraft raf royal_navy services specifications preserve design raf desired configuration precedence royal_navy number proposals submitted stage twin design considered rejected following labour government coming power project cancelled royal_navy acquire phantom raf continued foster development raf leading successful family development nato requirements development considered feasibility aircraft influenced general perception time aircraft held significantly value aircraft consequently april decided conduct preliminary work guidance aircraft designated larger employ chamber burning essentially previously cold forward engine engine development named exhaust equipped uses principle allowing aircraft theoretically reach speeds design effort initially undertaken cater issued august specifications called strike fighter combat radius kilometres nmi cruise speed dash speed aircraft kilogram able clear metre obstacle following metre takeoff roll requirement specifications changed aircraft considered subsequent studies confirmed fears bristol enlarged original engine raised exhaust heat increase thrust lbf new larger design emerged initially named redesignated attracted contenders principal competitor design employed separate lift thrust engine concept rolls engines provide lift single thrust supported submitted design nato january year emerged winner competition judged technically superior politically operative development production member nations project terminated french government subsequently withdrew following selection design raf royal_navy requirements december design submitted nato decided developed requirements use raf royal_navy february royal_navy admiralty received aircraft concept great interest royal_navy seeking new aircraft aircraft carriers single aircraft replace raf fleet air arm services sought different characteristics aircraft raf desired single seat fighter secondary intercept capability royal_navy wanted seat capable secondary low level strike capability financially politically committed joint requirement royal_navy raf single seat design took precedence seat version royal_navy raf accommodate navy large airborne intercept radar submitted design august royal_navy criticised proposal tandem layout incompatible catapult operations consequently design investigated accepted practical december year offered equipped thrust twin design alternative seen inferior considered great detail aircraft required vertical takeoff caused significant ground erosion aircraft armed red missile raf royal_navy requirements aircraft development started modifications naval requirements july weight gain considerable issue navy openly criticising choice despite stated navy preference swing wing fighter july services agreed aircraft completely common exception different radar systems august expressing view range changes damaging aircraft potential export time navy stated regarded second rate raf openly loss strike performance october concerned project progress noted effort combine strike aircraft fighter single aircraft trying fit airframe services cancellation november raf found suitable platform royal_navy appeared consider phantom better fit needs response focused efforts raf version february announced house_of_commons conservative government development contract placed equipped engine raf strike aircraft time announced naval requirement met engined positive news emerged october engine ran time received favourable reports competitive performance aircraft including phantom february incoming labour government led cancelled grounds cost aircraft strike aircraft transport time cancellation prototypes construction following cancellation raf royal_navy adopted instead government gave contract continued work raf led originally reserved enter service retrospect aviation author considered cancellation aircraft justified noting time consuming expensive failures attempts nations soviet russia west_germany aircraft aircraft multiple engines configuration like single thrust likes went great success specifications raf version data general characteristics crew length wingspan height max takeoff weight powerplant thrust engine lbf performance maximum speed sea level altitude service ceiling armament bombs
Hawker Siddeley P.1154