E6B Flight Computers and Fuel Testers

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• Use: FAA and Canadian pilot, mechanic and dispatcher knowledge exams (ASA)
• Functions: Time, speed, distance, heading, wind, fuel, altitude, cloud base, glide, climb/descent, weight and balance, holding pattern entry, plus clock, timer and stopwatch
• Screen: Backlit, with Standard / Night / Daylight themes; keys light in Dusk and Night modes
• Build: Cover snaps onto the back; non-slip strip
• Price: $126.47 on Amazon, Oct 18, 2026

• Menus follow the order a flight is planned, so answers chain into the next problem
• r/flying owners in 2023 and 2026 threads recommended it for the knowledge test
• $126.47 on Amazon Oct 18, about 8× the paper E6B
• Aircraft Spruce buyers mention a 20–30 minute learning curve and a stiff battery cover

Choose the ASA CX-3 when you want to work knowledge-test problems on a keypad instead of a wheel.

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• Type: Manual circular slide rule (calculator side) plus wind side
• Power: None needed
• Use: Allowed in FAA knowledge tests as a manual computer
• Price: $16.25 on Amazon, Oct 18, 2026

• $16.25 on Amazon Oct 18
• Nothing to charge or replace on test day
• Every answer is read off a scale by hand, and the wheel takes practice
• Paper-and-plastic construction; the aluminum version is $41.12

Choose the ASA E6B Paper Flight Computer when you want a $16.25 test-day tool for the DPEs who ask to see a manual E6B.

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• Type: Manual circular computer, aluminum, with color-coded scales
• Power: None needed
• Stock: Only 8 left at the Oct 18 check
• Price: $41.12 on Amazon, Oct 18, 2026

• Metal body for a flight bag that gets thrown around
• Color scales help separate the windows
• $41.12, which is $24.87 above the paper version, with the same scales
• Low stock at the time of checking

Choose the ASA Color E6B (aluminum) when you want a manual E6B that survives years of flight-bag use.

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• Capacity: 12 oz
• Design: Separates water and debris so clean fuel can be returned to the tank, where your operator allows it
• Price: $23.00 on Amazon, Oct 18, 2026

• r/flying posters say it fit the drains on every GA airplane they flew
• r/flying posters say it means less fuel on their hands
• Durability is the common complaint: 2024 r/flying threads report cracked lids on newer jars, and Amazon’s review summary flags the threaded lid

Choose the GATS Jar 12 oz when you sump many drains (posters cite the 13 on late-model Cessnas) and want a 12 oz jar.

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• Design: 6 in transparent cylinder with octane color coding molded in; fits quick-drain valves, with an adapter for recessed drains
• Extra: Screwdriver blade with Phillips and slotted heads
• Stock: In stock at the Oct 18 check
• Price: $13.98 on Amazon, Oct 18, 2026

• $13.98 on Amazon Oct 18
• Doubles as a cowling screwdriver
• Small sample per drain
• No filter for returning fuel

Choose the ASA Aircraft Fuel Tester AFT-1 when you want a $13.98, 6 in tester for a flight-bag pocket.

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• Design: Fuel tester plus catch cup, per the product label
• Stock: Only 14 left at the Oct 18 check
• Price: $43.03 on Amazon, Oct 18, 2026

• Tester and catch cup come together
• $43.03, $20.03 more than the GATS Jar
• Two pieces to carry instead of one

Choose the MultiSump Aviation Fuel Tester when you want a tester and a separate catch cup in one kit.