production and use
the most expensive part of the launcher is its propultion system. designing a reusable launcher requires the ability to reuse its engines after use with several consequences :
Many parts of a launcher engine operate under extreme conditions: some parts must be designed to
ability to withstand multiple uses with impact on manufacturing cost and performance
Rehabilitation after use must be done at economic conditions that do not jeopardize the financial viability of the reusable launcher. This condition
was not fulfilled for the orbiter of the American Space Shuttle.
LANDING
In order to lower launch costs, the reusable launcher must be able to return to its base.
To achieve this the launcher must be able to correct his descent trajectory. This goal imposes a high Finesse. This allows
the launcher to behave like a glider and to choose its landing place by being able to move away from its path of descent significantly.
CONCLUSION
The cost of launching a spacecraft is a major obstacle to the development of space activity.
The price of placing one kilogram in low earth orbit is included according to launchers between a few thousand dollars per kilogram
