In order to achieve accuracy in the shooting of successive arrows, their average velocity over the distance from bow to target must be kept constant to better than one foot per second.
Hence, a variation in average velocity of one foot per second Y over the short test distance is. A change from normal to hot, humid weather may reduce the cast of a bow constructed of organic material.
Reduced to simplest terms, what is required of a bow is that it shall shoot an arrow.
There are good, indifferent and bad bows; and all of them can shoot an arrow.
Bows of all-metal construction do not exhibit sensible hysteresis.