The RB. 211 was considered for the DC-10 during the development process, but McDonnell Douglas selected the General Electric CF6. Some later variants were equipped with the Pratt & Whitney JT9D, and there were plans in for an RB. 211 equipped DC-10-50 in the mid-1970s for sale to British Airways. Does anyone have any information on DC-10 designs with RB. 211 engines, or the DC-10 engine selection process?