News for hackers. Stuff that matters.

A comment on Why it's so hard to build a jet engine. Parent comment

Re:Why it's so hard to build a jet engine by abdullahkhalids on Saturday March 01, 2025 @05:26PM (#43224394)
On the other hand, only some fraction of the energy inherent in jetfuel is converted to work. So fuel based airplanes have to carry a lot of "extra" energy that is then just wasted as heat.
[ Parent | on HN ]
Re:Why it's so hard to build a jet engine by TylerE on Saturday March 01, 2025 @06:50PM (#43225428)
Jet engines are pretty good, over 50%, and electric is more lien 75 (not 100)
[ Parent | on HN ]