CREATE TABLE table_5271 ("Order Year" TEXT, "Manufacturer" TEXT, "Model" TEXT, "Fleet  ( Qty. ) " TEXT, "Propulsion" TEXT, "Length  ( ft. ) " FLOAT)

Which Model has hybrid propulsion?
SELECT "Model" FROM table_5271 WHERE "Propulsion" = 'hybrid'
SELECT "Model" FROM "table_5271" WHERE "Propulsion" = 'hybrid'