The Brabazon's 'Props' Turn -- The engines of the 'Brabazon' being 'tuned-up' outside its hangar at Filton, Bristol. Shortly after half-past seven this (Saturday) morning, the 'Brabazon', largest civil landplane in the world, was on its mile-and-a-half long runway at Filton, Bristol. ready to start taxi-in tests. It left its hangar yesterday for a final check-up, technicians using mobile scaffolding to inspect the wingh, rudder and the eight 2,500 h.p. engines. After its tests today the 130-ton