Giant jet engines aim to make our flying greener January 16, 2020 at 04:21PMhttps://https://ift.tt/2uRPROV How much more efficiency can be wrung out of the jet engine - technology which is over 70 years old?

How much more efficiency can be wrung out of the jet engine - technology which is over 70 years old?

from BBC News - World https://ift.tt/2uWL4Ml