量比F-22更大,且在機械複雜度上更低,燃油效率更高,並更加靈活。該計畫於2000年被終止。 Jenkins, Dennis R.; Tony Landis; Jay Miller. SP-2003-4531: American X-Vehicles: An Inventory, X-1 to X-50
(原始内容存档于2021-12-28). Template:JamesAbstract Jaffe, Jay. 2022 Golden Days Era Committee Candidate: Tony Oliva. fangraphs.com. FanGraphs. [23 November 2021]