ground level. This gives good performance, negating the need for more complex solutions.[來源請求] Some designs for SSTO attempt to use airbreathing jet engines
copy (PDF). [25 April 2020]. (原始内容 (PDF)存档于22 February 2017). That's a lowlevel strike: Iranian Air Force F-4 Phantom. theaviationist. February 9, 2012