http://apcnasa3ozl2j74htizuzba5b6nhugbg2qze2nrz43siunkct555fpid.onion
The propellant exhaust velocity can easily be found by multiplying I sp by the appropriate conversion value (g c , the standard acceleration of gravity, 32 ft/sec 2 or 9.8 m/s 2 ). Thus, a chemical propulsion system with an I sp of 400 s would have an exhaust velocity of 12,800 ft/s or 3,920 m/s.