CREATE TABLE table_11279 ("Entrant" CLOB, "Constructor" CLOB, "Chassis" CLOB, "Engine" CLOB, "Tyre" CLOB, "Driver" CLOB, "Rounds" CLOB)

What chassis was used by roy salvadori?
SELECT "Chassis" FROM table_11279 WHERE "Driver" = 'roy salvadori'
SELECT "Chassis" FROM "table_11279" WHERE "Driver" = 'roy salvadori'