What are some indication errors that can occur in altimeters?

The presence of scale errors, hysteresis, and friction are indeed significant factors that can lead to indication errors in altimeters. Scale errors occur when the scale on the altimeter does not accurately reflect the true altitude, which can happen due to manufacturing variances or lack of calibration. Hysteresis refers to the lag in response of the altimeter needle, which can result in the needle not immediately reflecting changes in altitude as the plane ascends or descends. Friction can impede the movement of internal components of the altimeter, causing it to stick or respond slowly, leading to inaccurate readings.

These errors can significantly affect the reliability of altitude readings, which is crucial for aircraft operations, particularly during landing and takeoff phases. Understanding these types of errors is essential for pilots and maintenance personnel in ensuring accurate altitude readings and safe flight operations.