> We need better materials for the engines and the tanks to make them reusable. Better than which target? Yes there is a lot of stress, but what make you say w

> We need better materials for the engines and the tanks to make them reusable. Better than which target? Yes there is a lot of stress, but what make you say with such certainty that the stress levels are not suitable for 2, 3, 10 or 50 launches? Just reusing a rocket a single time would be a huge cost saver. I don't see how this is not "economically viable". > When you launch single-use rockets every next one is more advanced and reliable than the previous one Let's not forget that we have been using russian engines build in 1960 and stored in a hangar for decades in siberia on the Atlas and Antares...