http://apcnasa3ozl2j74htizuzba5b6nhugbg2qze2nrz43siunkct555fpid.onion
Several space storable fluorinated propellants are under consideration by the USAF for SDI/BMD application. ClF 5 /N 2 H 4 , OF 2 /C 2 H 4 , and N 2 F 4 /N 2 H 4 , with I sp values of 329, 375, and 358 lb f -s/lb m , respectively, are being researched.