Rolls-Royce concludes testing of plane technology to break electric speed record

Re:Rolls-Royce concludes testing of plane technology to brea... by virtue3 on Tuesday September 29, 2020 @05:09PM (#24633006)

The issue is that you do NEEd air in order to use the props. So there is a limit to how high you can go.

Air resistance vs not having enough air to push.

Basically - you can design the prop for high altitude, but then takeoff is gonna not be great. You could design a variable prop system (or even have 2 different ones?) but then weight / complexity.

https://www.hindawi.com/journals/ijae/2018/5782017/

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Re:Rolls-Royce concludes testing of plane technology to brea... by nickik on Wednesday September 30, 2020 @08:29AM (#24638059)

If you go supersonic you get enough air in even when flying higher.

His plane is VTOL so the overpowered engines for supersonic will work well for liftoff.

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