Hawker Siddeley HS.141
... that the lift jets on the Hawker Siddeley HS.141 airliner were expected to provide a safety margin in case the V/STOL aircraft's main engines failed?
... that the <a href="./Lift_jet" id="mwAQw" rel="mw:WikiLink" title="Lift jet">lift jets</a> on the <b id="mwAQ0"><a href="./Hawker_Siddeley_HS.141" id="mwAQ4" rel="mw:WikiLink" title="Hawker Siddeley HS.141">Hawker Siddeley HS.141</a></b> airliner were expected to provide a safety margin in case the <a href="./V/STOL" id="mwAQ8" rel="mw:WikiLink" title="V/STOL">V/STOL</a> aircraft's main engines failed?