**4.2 Efficiency**

Another benefit is efficiency. Compared to today's large turbofans, which are 55% efficient, and small turboprops, which are 35%, electric drivetrains can be more than 90% efficient. One of the reasons why the electrification of propulsion is beginning with the modification of regional aircraft powered is because of the disparity in efficiency between large and small turbines.

*Electrification for Aero-Engines: A Case Study of Modularization in New Product… DOI: http://dx.doi.org/10.5772/intechopen.109006*
