If we’re talking about orbital propellant depots, the individual launches of fuel don’t have to be very big, as long as the price per kilogram to LEO is favorable. Rockoons are but one method of circumventing the rocket equation. Many others are known, with some being more realistic than others in the short term.
If we’re talking about orbital propellant depots, the individual launches of fuel don’t have to be very big, as long as the price per kilogram to LEO is favorable. Rockoons are but one method of circumventing the rocket equation. Many others are known, with some being more realistic than others in the short term.