ASA CX-3 Flight Computer: Ultimate Electronic E6-B Calculator

Is the ASA CX-3 FAA approved, and can I use it on the Private Pilot written exam?

Yes. The CX-3 is an FAA approved electronic flight computer, and you can bring it to a testing center for the Private Pilot knowledge exam. ASA states it is accepted for pilot, dispatcher, and mechanic knowledge exams in both the United States and Canada, so it supports you from written test preparation into real flight planning.

What can the CX-3 calculate, and is it really an electronic E6B?

Yes, the CX-3 is an electronic E6B that streamlines flight planning math. It computes airspeed, fuel burn, density altitude, weight and balance, and center of gravity, and it handles tasks like crosswind components. You can also store customizable aircraft profiles for quick access to specifications, so routine calculations take only a few keystrokes.

Does the CX-3 replace a traditional mechanical E6B or whiz wheel?

Yes. The CX-3 is built to do what a mechanical E6B whiz wheel does and more, handling the same time, speed, distance, wind, fuel, and altitude problems electronically. Many pilots use it as their primary computer because it is faster and easier to read, though some students still keep a manual E6B as an inexpensive battery free backup.

Does the CX-3 remember my data when I turn it off?

Yes. The CX-3 uses data-saving memory that preserves your information even when the unit is powered off. Saved aircraft profiles and flight parameters stay in memory, so you do not have to re-enter critical data each session. This is a clear advantage over basic calculators and is handy for repeat trips in the same airplane.

Is the CX-3 easy to read in the cockpit at night?

Yes. The CX-3 has a clear LCD screen built for easy readability in any cockpit condition. You can choose from three display themes and four backlighting options, giving you bright daylight viewing and dimmed settings for night operations. The intuitive layout guides you through calculations with minimal keystrokes, helping reduce heads-down time while you fly.

Can I use the CX-3 for instrument training and IFR flight management?

Beyond core E6B math, the CX-3 includes integrated timer functions and a UTC clock that support comprehensive flight management. These tools are useful for instrument students and rated pilots, not just at the Private Pilot stage. Flight instructors favor it because it bridges exam preparation and practical operations, giving you a lasting tool well past your first knowledge test.

Does the CX-3 handle aviation unit conversions?

Yes. The CX-3 includes built-in unit conversions for common aviation measurements, so you can switch between the units you need without juggling separate charts or apps. This keeps your work fast and consistent during flight planning, study, and everyday flying, and it complements the airspeed, fuel, wind, and weight and balance calculations the computer already handles.

How does the CX-3 compare to the Sporty's Electronic E6B?

Both are FAA exam approved electronic flight computers that handle the core navigation, wind, fuel, and weight and balance math. The CX-3 stands out with its clear LCD screen, three display themes, and four backlighting options, and one customer noted its larger font and layout were easier to read than the Sporty's unit. The best choice comes down to display and feature preference.

How big is the CX-3, and is it easy to carry?

The CX-3 is compact and portable, listed at 3.33 inches wide, 6.5 inches high, and 7.5 inches deep, so it slips easily into a flight bag. Its lightweight design makes it convenient to carry to a testing center or out to the aircraft, and the clear screen and simple controls keep everyday flight planning fast and straightforward.

How is the CX-3 powered, and is it rechargeable?

The CX-3 is not a rechargeable unit. It runs on replaceable batteries, so when the cells run low you simply swap in a fresh set rather than plugging it in to charge. Battery life is generally long for everyday flight planning and exam preparation, and a spare set is easy to tuck into your flight bag as a backup.