Four Dimensions
Faster, slower. Higher, lower. Bigger, smaller. Expensive, cheaper. Like the four dimensions physicists use to describe the universe, these four dimensions describe the universe of general aviation airplanes.
The speed, altitude and size of the airplane you fly determines the kinds and levels of risk to which you expose yourself. The most extreme example is one of a military pilot skimming the treetops at attack speed, who is in a decidedly riskier spot than that same pilot ferrying that same aircraft from one base to another in the flight levels.
The same could be said for general aviation airplanes, though perhaps the extremes are closer together. Flying a J-3 Cub at 1,500 feet agl…