> I know the E6B is pretty common for pilots still.
I've used that before. It is not a standard logarithm stick but a vector addition tool. Does one thing very quickly.
I've used that before. It is not a standard logarithm stick but a vector addition tool. Does one thing very quickly.
The main difference between a straight and circular rule is that it has only one appearance of the index, so you don't have to move the slide around as much, and it's round so the equivalent of a 10" rule has around 3" diameter.
It also has other scales for converting altimeter/airspeed (really pressure gauge) readings into other numbers more useful for certain purposes like true altitude (good for missing obstructions) and "density altitude" (for estimating takeoff performance, also helpful for missing obstructions).