The E6B flight computer, nicknamed the “whiz wheel” or “prayer wheel”, is a form of circular Manual E6Bs/CRP-1s remain popular with some users and in some environments rather than the electronic ones because they are lighter, smaller. A Pilots Guide on How to use the E6B Flight Computer by lriccc in Types > Instruction manuals. E6B Flight Computer Instructions. Instructions for the E6B Flight Computer. ASA’s E6-B features a wind component grid and comprehensive crosswind correction.

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It is well designed to assist you in solving the planing and navigating problems associated with flying. I thought to myself, what reassuring words! Learning how to use an E6B is going to be a piece of cake! The words in quotations above are the first words printed in the 50 page instruction manual that came with my E6B.

If you fast forward five hours from the time I first read that quote you get this:. Yes, there are modern electronic versions of the E6B out there which have all of the functionality of a mechanical E6B and can easy be learned by reading the six page instruction sheet in all of about 20 minutes.

So then, is the mechanical E6B dead?

Believe it or not, a mechanical E6B is actually faster at making calculations, and can populate a navigation log faster than its electronic competition.

This coupled with the fact that a mechanical E6B requires no batteries, is essentially indestructible, and looks a lot cooler than a electronic E6B means that the mechanical e6B is here to stay. The only thing keeping pilots from buying a mechanical E6B is the learning curve. This small dent was created when I threw my beloved E6B across the room against a wall in frustration.

The reality of the E6B is that, although it is simple to operate, it is not an intuitive piece of equipment to learn. This is especially true for those of us who did not grow up in the slide fligut generation; as that is exactly what the E6B is, a slide rule.

I made this post with the goal of providing a reference which could be used to learn the bulk of the essential E6B skills quickly and without frustration. I designed it to be read through and practiced in about 20 minutes, the same time it takes to become familiar with the electronic version.

I am going to use a Jeppesen E6B for this write-up. Modern E6Bs are essentially copies of the original s design anyway! The E6B has two sides which are used to perform different tasks. The back side is used for calculating wind correction only crab angle and groundspeed. The front side is used for everything else. The center metal piece that slides up and down and makes up the majority of ee6b computer labeled 5 is only used with the back side. E66b a flight student, you will need to use your E6B to perform a couple of different calculations.

These can be placed into the three different task groups as follows:. Each one of these three skill groups require a different technique to perform and can be practiced independent of each other.

## ASA eBooks

Before actually getting into some problems, you have to learn a little about the parts of the E6B. First I will define the scales and the pointers, and then I will show you how to put them into action! The front side of the E6B is essentially a circular slide rule with three separate scales. These scales are named and highlighted below:. It provides a way to input and reference data with pointers kind of like the buttons on a calculator.

It is also where you will read all variables except time. It can also be used for multiplication and division.

Pointers are the input method of the E6B. Different pointers will give you outputs in different units or bases.

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It allows you to work with minutes and hours or do anything in base Ok, so now you are familiar with the three computet scales on the E6B and the three different pointers. Its time to put them to work! I decided to show how to multiply and divide on the E6B first.

Then find the number you want to multiply by on Scale B.

Read your answer directly above this number on Scale A. It instead has the numbers on it. One common feature of all slide rules, the E6B included, is that they do not account for order of magnitude. This is a good thing and a bad thing. On the positive side, It means any number on the scale can represent any order of magnitude of that number. So, the 90 in the example above could be a 9, 90,or , On the negative side, it means that you have to know the expected order of magnitude of your answer.

So, if I multiply 9 by 9, I need to know that the 81 output I receive is 81 and notor , Conversely, if I were multiplying 90 by 90, my answer would be 8, Now try an aviation related problem: On a cross country flight, you climb at feet per minute for 7 minutes. How much altitude did you gain? Again watch order of magnitude and apply logic as necessary. Your Cessna probably gained more than As your E6B skills improve, you will be able to do problems like this much faster than you could with a calculator.

Rotate the wheel to align your numerator on Scale A with your denominator on Scale B. You need to descend 5,ft in 7 minutes.

### E6B Flight Computer Instructions

What descent rate will you need? The rest are approximated in the scale. This is a common operation that needs to be done to fill out a Nav log or during a diversion in the air. Typically, time is though of in seconds, minutes, and hours rather than percentage of hours 1: Because this is a base 60 system, the multiplication pointer wont work for most problems. Before you start a leg time problem, you must first ask yourself: Is going to take hours, minutes, or seconds to get between these two points?

This will tell you which scale and which pointer you will need to use. At kts ground speed, how long will it take you to travel between two checkpoints that are 18nm apart? Find the f6b on scale Aand read the answer off of Scale B directly across from the distance.

Cpmputer, the E6B will not return an answer in minutes and seconds. It only works in whole units for minutes. You can either round your answer up or down 9. The nice janual about the mechanical E6B for these types of problems is that it does not have to be rotated again flitht calculate different legs if the ground speed is unchanged.

This is ccomputer useful for filling out Nav logs and makes the mechanical E6B much faster than its electronic counterpart.

If you suspect it will take hours between legs, the method is the same except: How long will it take to fly nm at a groundspeed of kts?

If you suspect it will take seconds between legs, the method is the same except: You can work in reverse to find ground speed for a known leg time and distance, and distance for a known leg time and ground speed using the following methods:. Align the distance you traveled on Scale A with the time you traveled on either Scale B for minutes or Scale C for hours.

Read you groundspeed off of the pointer. Align the pointer with the groundspeed. Follow the time directly across to Scale A to get the distance traveled. The procedure for determining fuel burn for a given leg is similar to finding leg time. Like leg time, the pointer and scales you use will be different if you are working with seconds, minutes, or hours. Find the leg time on either Scale B for minutes Scale C for hours.

For secondsuse the Second pointer and Scale B. How much fuel will a Cessna burn on an 8 minute leg with a fuel burn of 5. To find crab angle and groundspeed adjusted for wind, you will need to flip the E6B over to the backside.

On the backside of the E6B, you will notice a rotating dial and a metal slider. The metal slider is reversible and has one side for low speed aircraft like light training planes and one side for high speed aircraft like jets.

Now that you are oriented and have your trusty pencil, you can begin the process. Below are the steps:. Now slide the metal slider so that the pencil mark you made lines up with your true air speed. In this example, this will mean that the mark will be left of the center-line. Read the groundspeed corrected for wind at the center-line.

In this example, the ground speed is kts. Find the wind correction angle by counting the units between the pencil mark and the centerline. In this example you will get about 6 degrees. If you pencil mark falls to the left of the centerline, subtract the value from your True Course to get your True Heading.

If your mark falls to the right add the value. Because the process for finding TAS and Density Altitude is the same, I have combined these two tasks into one example. The E6B can do a bunch of conversions.

Rather than outline each one, I have made a collage of sorts to highlight a couple:.