Density Altitude Explained: Hot and High Days
What density altitude is, how to calculate it from elevation, altimeter setting and temperature, and how it affects take-off and climb.
Aviation Guides
Aviation Guides
Aviation guides for student pilots, flight dispatchers and aviation enthusiasts: reading METAR and TAF weather reports, altimeter settings, flight levels, density altitude, crosswind components, weight and balance, fuel planning and flight-plan codes. Each guide explains the concept with worked examples and links to the matching USFITools calculator. Educational use only: always follow your aircraft flight manual, operator procedures and the regulations of your aviation authority.
Aviation Guides
Aircraft Weight and Balance: Calculating CG
How to calculate aircraft weight, moment and centre of gravity, why CG limits matter and how fuel burn moves the CG, with a worked example.
Aviation Guides
QNH, QFE and QNE: Altimeter Settings Explained
What QNH, QFE and QNE mean, when pilots use each one, how to convert between hPa and inHg, and why the transition altitude matters.
Aviation Guides
Zulu Time (UTC) in Aviation: Converting to Local
Why aviation runs on UTC, what the Z in 0830Z means, and how to convert Zulu time to UAE, Pakistan, UK and other local times without date mistakes.
Aviation Guides
Crosswind and Headwind Components Explained
How to work out crosswind and headwind for any runway using trigonometry or the clock-face rule of thumb, with worked examples and common pitfalls.
Aviation Guides
How to Read a METAR and TAF: A Line-by-Line Guide
Decode METAR and TAF aviation weather reports group by group, with real examples from Dubai International and a checklist for avoiding common mistakes.