Referral-Tree-Impulse-Drives

• Spacecraft Drives (Interplanetary Drives)

• Reaction Drives:

• Reaction Rockets:

• R-Drive (Rocket Drive)
• O-Drive (Orion Drive)
• H/P-Drive (HEPlaR Drive)

• Impulse Drives:

(Field Drives / Propellantless Drives)

• Z-Drive (Lifter / <1.0 D)
• G-Drive (Gravity Drive / <10.0 D)
• M-Drive (Maneuver Drive or Thruster Plate / <1000.0 D)
• N-Drive (NAFAL Drive / <¹/₈ ly)

• Reactionless Drives:

• T-Drive (Reactionless Thruster: Gyroscopic Inertial Thruster (GIT) or Dean Space-Thruster Drive)