Sailplane Altimeter Tools to Show Flight Levels
Sailplane Altimeter Tools to Show Flight Levels
This Demonstration shows the use of two new tools that allow sailplane pilots to read off simultaneously their altitude (in meters) above Mean Sea Level (MSL), which depends on the local pressure at MSL, known as the QNH, as well as their height in Flight Levels (FLS), which is their height according to the International Standard Atmosphere (ISA). The basic idea behind these tools is that when the interior of the altimeter is turned to change the zero setting, a transparent disk fastened inside a nontransparent ring on the outside of the altimeter is turned by the same angle.