http://apcnasa3ozl2j74htizuzba5b6nhugbg2qze2nrz43siunkct555fpid.onion
JPL worked on F 2 /N 2 H 4 (fluorinated hydrazine) until NASA funding was terminated in the early 1980's. F 2 /N 2 H 4 has an I sp of 376 lb f -s/lb m , and is an excellent performer in both pressure and pump fed systems, and is space storable. OF 2 /C 2 H 6 is also space storable, and has an I sp of 370 lb f -s/lb m .