steam engines were replaced by oil, and then, the rulebook was rewritten when jets were invented. That was 80 years ago. Jets are old. We need to minimise the moving parts. To do so we need to increase the density of stored energy so more can be used. The answer is atoms. Not old fashioned uranium atoms, but fresh, new fusion reactors. They shall create not heat, but clean electricity. It is long overdue. Even professor calculus knew that the best way to get tintin to the moon was by using nuclear energy. We need to reinvent the plane, not make a better version.