The picture was simply the best visualisation of what I meant. I'm thinking of an angled gear that is long, with the teeth between 45 and 90 degrees to the airflow.
No, screws cause more drag. Conventional propellers started off as screws with one half turns.
Conventional propellers, however, have variable thrust with distance from the centre, which can cause the speed of sound to be broken towards the tips, causing high drag.
The idea of using a long...
I just want to know what the individual gears are called.
The reason is that I want to ask a question about their performance if they were used in place of traditional propellers.
Why not?
If we were to visualise the gravitational "force" as being made of field lines, the length contraction caused from the perspective of a moving observer would (intuitively, and of course I could be wrong) cause the field lines along the direction of travel to move closer together.