CREATE TABLE table_203_823 (id NUMBER, "model name" CLOB, "date" CLOB, "type" CLOB, "thrust  ( kg )  / power  ( eshp ) " CLOB, "fitted to" CLOB)

which model has a thrust of at least 12,000 kg ?
SELECT "model name" FROM table_203_823 WHERE "thrust (kg) / power (eshp)" >= 12000
SELECT "model name" FROM "table_203_823" WHERE "thrust (kg) / power (eshp)" >= 12000