María Pérez Muñoz

1º Find the contrary of these charasteristic FRAGILE - STRONG LIGHT - DARK RIGID - FLEXIBLE CLEAN - DIRTY ROUGH - SOFT HOLLOW - FULL INERT - ALIVE STRAIGHT - DISTORTED SHINY - MAT POINTED - ROUNDED 2º Find an item on an aircraft made of each os these materials COPPER  In  aircraft ,  copper  is  used  primarily in the electrical system for bus bars, bonding, and as lockwire STAINLESS STEEL  Common  uses  in the  aircraft  industry include jet engines, exhaust ducts, flanges, piston engine exhaust manifolds, afterburners, flash boilers, and more HONEYCOMB  Honeycomb  sandwich structures are widely  used  on  aircraft  flight control surfaces such as rudder, aileron, spoiler, and flap.  FABRIC  Currently, only a few approved fabrics are used for aircraft coverings, such as the  polyester  fabrics Ceconite™, Stits/Polyfiber™, and Superflite™ GLASS  used in aircraft  to build windshield and window panes, canopies, panels

TURBOJET The basic componets are still the compressor, combustor, and turbine. The turbojet gets its propulsive power from reaction to the flow of hot gases. Air enters the inlet and ts pressure is increased by the compressor. Fuel is added in the combustor and the expansion created by heat forces the turbine wheel to rotate. The turbine in turn drives the compressor. The energy remaining downstream of the turbine in the tailpipe accelerates into the atmosphere and creates the reaction we refer to as thrust. TURBOFAN The turbofa, in effect, is a ducted, multi-blade propeller driven by a gas turbine engine. This fan procedures a pressure ratio on the order of 2:1 or two atmospheres of compression. Generrally, turbofan contain 20 to 40 fixed pitch blades. They were developed to provide a compromise between the best features of the turbejet type cruise speed capability and yet retains some of the short field takeoff capability of the  turboprop. By compariso