E6-B Flight Computer

The E6-B flight computer was first introduced by Jeppesen Sanderson in the 1930s and quickly became a popular tool among pilots. The device consists of a circular slide rule and a rotating bezel, which can be used to perform various calculations such as ground speed, true airspeed, fuel consumption, and wind correction angle. The E6-B was designed to be used in flight planning and navigation, and it allows pilots to quickly and accurately perform complex calculations.

One of the most important calculations that the E6-B can perform is wind correction angle. The device allows pilots to determine the direction and speed of the wind, and then calculate the heading they need to fly in order to compensate for the wind and maintain their desired course. This is particularly important for pilots who are flying in adverse weather conditions or who need to navigate around obstacles such as mountains.

In addition to wind correction angle, the E6-B can also be used to calculate fuel consumption, time en route, and other important flight parameters. The device is particularly useful for pilots who are flying small aircraft that do not have electronic flight computers or who need to perform calculations quickly in an emergency situation.

While electronic flight computers have largely replaced the E6-B, many pilots still carry the device as a backup in case of electronic failure. In addition, the E6-B is still used in flight training, as it provides a valuable tool for teaching pilots how to perform calculations manually and understand the principles behind flight planning and navigation.

To use the E6-B, pilots must first align the rotating bezel with the appropriate measurement scale on the circular slide rule. They can then perform calculations by rotating the bezel and reading the results on the slide rule. The device requires some training to use effectively, but once mastered, it can be a powerful tool for performing quick and accurate calculations in the cockpit.

Most flight schools still teach this in their ground school programs.  Don’t think for a second that you will not have to.  As well, when you do your PPL flight test,  you will be asked to perform a diversion.  Depending on your Flight test examiner he or she me force you to use the E6-B.  So, know how to use it.

One important note:

Not all E6-B flight computers are the same.  I went to my ground school with an older E6-B computer.  When the ground school instructor started going through the calculations, the procedure differed on mine.  So, I suggest talking to your flight instructor and ensuring you get the same E6-B they will be using at the school.  This will save you time which means money in the long run.