SELECT engine FROM table_name_77 WHERE entrant = "dr ing f porsche kg" AND chassis = "porsche rsk (f2)"
CREATE TABLE table_name_77 (engine VARCHAR, entrant VARCHAR, chassis VARCHAR)
เครื่องยนต์ใดที่ dr ing f porsche kg ใช้กับแชสซีของ porsche rsk (f2)
Which engine did dr ing f porsche kg use with the porsche rsk (f2) chassis?