15 seconds of flight about the same height as vanilla but slower

customizable but requires a .ini edit or console command to work = setgs fJetpackThrustSustained 99.5 increase to add more power and vice versa (more info in description)

30 seconds of flight about double vanilla height but slower

45 seconds of flight

60 seconds of flight

10 minutes of flight more than enough to hit the sky box and pacman back through the floor