Georgia Tech researchers have created a new engine for rockets that will help them go faster, reducing fuel spend by 40%. How? Well, in few words, this new system works as a "five-gear engine". The new system lets the rocket save fuel by using solar energy once the rocket is in outer space, using first gear only when acceleration is needed.
The project has been funded by the US Air Force with the first uses obviously in military, but let's hope it soon turns into some civil use!