[nandomrumber]

With diminishing results.

Turbofans and supercritical airfoils are done to the point of engine manufacturers looking to propfans and alternative materials (carbon fibre) to eke out further efficiencies.

Although carbon fibre has significant down sides.

[WalterBright]

I have patented the idea of replacing the nitrogen in the cabin air with helium. I'm waiting for the money to roll in!

[nandomrumber]

Looks like I picked the wrong week to quit sniffing glue.