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Part# 13-01040
MFR Model# ASA-CX-3


Note: To mount the CX-3 flight computer, use the MGF Sport Stratus mount combined with any MGF Sport yoke, suction, glare shield mount. (See Accessories)

The CX-3 Flight Computer provides a fast, accurate flight computing solution and takes confusion out of the equation for ground school study, preflight planning, and enroute navigation. Fast, versatile and easy to use, the CX-3 delivers accurate results quickly and efficiently through an intuitive menu structure designed to follow typical flight planning sequences with a minimum of keystrokes. It can be used on all FAA and Canadian pilot, mechanic, and dispatcher knowledge exams.

A multitude of aviation functions can be performed on the CX-3 flight computer including those related to time, speed, distance, heading, wind, fuel, altitude, cloud base, standard atmosphere, glide, climb & descent, weight & balance, as well as a holding pattern function to help determine entry method and holding details. A calculator, clock, timer and stopwatch are also built in along with multiple settings for lighting, backlighting, themes, scrolling speed, time zones and more.

The sleek design, and ergonomic fit and finish of the CX-3 make for easy transport. The removable cover provides protection for the computer when it's not in use and serves as a base for the unit when attached to the back. A no-slip-strip prevents the CX-3 from sliding around on smooth desk surfaces. A Theme feature provides a convenient way to switch from Standard view to Night or Daylight views. The backlighting feature controls the brightness or intensity of the screen, and the buttons on the keypad will light up in Dusk and Night modes for use in darker environments. A Favorite feature provides quick access to your most frequently used function, and aircraft profile memory to save weight and balance information for your specific aircraft.


  • Weight: 0.70 lbs
  • Dimensions: 3-1/3" W x 6-1/2" H x 3/4" D


May be used for FAA and Canadian Exams
The CX-3 complies with FAA Order 8080.6 and Advisory Circular (AC) 60-11, "Test Aids and Materials that May be Used by Airman Knowledge Testing Applicants"; therefore, you may bring the CX-3 with you to the testing centers for all pilot, mechanic, dispatcher, and FAA exams.

Numerous Aviation Functions
Calculate everything from true airspeed and Mach number, fuel burn, holding patterns, to headwind/crosswind components, center of gravity (CG), and everything in between. The menu structure provides easy entry, review, and editing within each function. Multiple problems can be solved within one function.

User Friendly
The color LCD screen displays a menu of functions, and the inputs and outputs of a selected function, for easy-to-read menus and data displays. The inputs and outputs of each function are separated on the display screen so it is clear which numbers were entered and which were calculated, along with their corresponding units of measurement. The menu organization reflects how a flight is normally planned and executed. The result is a natural flow from one function to the next with a minimum of keystrokes: to plan a flight, simply work from the menus in sequential order as you fill in your flight plan form.

Non-volatile memory
All settings including aircraft profile, weight and balance data, trip plan data, values entered by the user, and calculations performed by the device will be retained until the batteries are removed or the user performs a memory reset. Follow the CX-3 User Guide for info on backing up and restoring memory.

Ergonomic Design
The CX-3 features a simple keyboard and slim design. The non-slip cover will protect your computer inside the flight bag and it fits on the backside of the unit for easy storage while in use.

Unit Conversions
The CX-3 has 12 unit-conversions: Distance, Speed, Duration, Temperature, Pressure, Volume, Rate, Weight, Rate of Climb/Descent, Angle of Climb/Descent, Torque, and Angle. These 12 conversion categories contain 38 different conversion factors for over 100 functions.

Timers and Clocks
The CX-3 has two timers: a stopwatch that counts up, and a countdown timer. The stopwatch can be used to keep track of elapsed time or to determine the time required to fly a known distance. The countdown timer can be used as a reminder to switch fuel tanks, or to determine the missed approach point on a non-precision instrument approach. An internal clock continues running even when the flight computer is turned off. UTC, destination and local time can be displayed, and the time can be set with UTC, destination or local time.

Interactive Functions
The CX-3 is designed so the functions can be used together. You can perform “chain” calculations where the answer to a preceding problem is automatically entered in subsequent problems. Standard mathematical calculations and conversions can be performed within each aviation function.

Up to Date
The unit features a micro-usb port which can be used to update the CX-3 firmware and backup user data. The update procedure is outlined in Appendix B of the manual.

In The Box

  • CX-3 Flight Computer
  • 4 AAA batteries
  • Protective cover
  • Quick start guide
  • Accessories
  • Customers Also Viewed
  • Frequently Purchased With


I was studying for my instrument written exam and my mechanical slide-rule type E6B fell apart in my hand, so I decided to try an electronic one. I would have rated this computer 5 stars, but the first two I was sent did not work. The first one turned on but the screen malfunctioned as soon as I tried to use it. The second one turned on but locked up and would not function. In fairness, the second one came with half of the box so wet that it was held together only by the copious amount tape that was used. That said, the computer itself, including the box it was in, were dry and showed no signs of moisture, thanks to a large amount of bubble wrap and tape. This flight computer is simple to use. It took me a few minutes to figure out where to go to get the calculations that I needed, but the operation is still pretty intuitive. Aircraft Spruce was very good to deal with, but being without a computer for two weeks made it very difficult to study. I’m still a bit concerned that this computer may not hold up. I guess time will tell. I have apps on my phone for backup.

Clint H
July 6, 2019

Exactly as described

May 5, 2019

I own a CX-2 and used one of these CX-3s on my ground items for the flight exam - SO intuitive! I bought one for myself so now Im prepped for my written! Def prefer this model!

February 1, 2019

Very easy to use. If you get the ASA Android or iPhone app for the FAA Knowledge test and practice with that it will tell you how to solve the questions on the CX-3 which is nice. The buttons are large and the display clear and easy to read so this thing is actually usable in the cockpit! The competitors device is hard to read and impossible to use in flight in turbulence. The competitors device also has little icons it displays on its monochrome screen to signal which function you are performing. This has color and a backlit screen and there is no mistaking what you are doing with it. It is a must have for the FAA Knowledge test!

John B
January 31, 2019

Excellent product. I bought this to replace a Sportys electronic E6 B. This costs about $20 more but is worth every penny. It is much faster than the old circular unit. I highly recommend this product. The shipping was also very fast.

David R
September 11, 2018

Simple to use. Intuitive menu. Does every aviation calculation I can think of. Reasonable price. What else can you ask for?

Paul L
July 26, 2018

Excelent kit. Pitty not allowed for our CAA exams. Well thought out and easy to use.

Geoff S
May 2, 2018

Brilliant intuitive pilot tool comes with protective case and a quick start cheat card. Has a large backlit readable screen white letters and numbers on black background easy to see. Surprisingly unit conversions also include Mb for baro setting speed in kts weight in Kg to suit Australian aviation units used. I got the best price at Aircraft Spruce even after import taxes and freight cost. Its imperative to download CX3 Flight Computer instructions to be able to become conversant and to use its full potential.

Mr G
March 1, 2018

As a CFI I purchased this for my students to use on written tests. It takes a little bit to figure out how to use it. Not as easy to use as the Apps.it took about 30 minutes to start figuring it out. For the money spent It should be easier to use like the other calculators I’ve used.

January 21, 2018

This device is intuitive to the point I did not need to read the instructions. It is very easy to use.

Chad D
January 18, 2018


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