Falconry training and technique the jesses lying on the scale can change the reading, so the falconer has to be careful to lift them up while the bird is being weighed. Above that range of weight, the bird will be unresponsive in the field, lacking in motivation to hunt or return to the falconer in timely fashion. Gauntlets or gloves are used by the falconer to turn the arm into a suitable perching surface. Falconry gloves may only cover the fist and wrist, while gauntlets for larger species extend to the elbow. An eagle glove may cover the entire arm and a portion of
Momentum exchange tether than the orbital velocity of the tether and the upper endpoint is moving faster. The word is a portmanteau derived from the words "rotor" and "elevator". If the tether is long enough and the rotation rate high enough, it is possible for the lower endpoint to completely cancel the orbital speed of the tether such that the lower endpoint is stationary with respect to the planetary surface that the tether is orbiting. As described by Moravec, this is "a satellite that rotates like a wheel". The tip of the tether moves in approximately a cycloid, in which it is momentarily