CX-3 Flight Computer
The common CX-3 functions: time-speed-distance, fuel, wind, climb, descent, density and pressure altitude, and crosswind.
Inputs
Result
Time en route
2:00
2 hours
Total minutes
120min
Fuel required
At the entered hourly burn
60units
2:00 en route, 60 units fuel
Formula
Ref- Time·speed·distance, fuel, and wind as on the E6B
- Climb/descent: gradient = tan(angle) × 6076 ft/nm
- Density & pressure altitude from field elevation, QNH and OAT
Worked example
RefDensity Altitude mode: field 2,000 ft, QNH 1013 hPa, OAT 30 °C.
- 1.Pick the Density Altitude function.
- 2.ISA deviation = 30 − 11 = +19 °C.
- 3.DA = 2,000 + 120 × 19 = 4,280 ft.
Density altitude ≈ 4,280 ft — plus 7 more CX-3 functions.
How it works
RefA digital version of the CX-3's most-used functions in one place. Choose a function and only its inputs appear; every mode reuses the exact Flight Deck core for that calculation — time-speed-distance, fuel, wind triangle, climb, descent, density altitude, pressure altitude, and crosswind — so results match the dedicated tools.
DGCA student tip
ExamThe CX-3 is approved for many exams because it just automates the standard formulae. Knowing which function to pick — and the rule behind it — matters more than the buttons; this tool mirrors that decision.
Common mistakes
Watch- Correcting to pressure altitude but forgetting temperature for density altitude.
- Using indicated altitude difference for descent without the target's elevation.
- Checking crosswind limits against the steady wind rather than the gust.