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## How a passenger changing seats in flight can affect performance

Bob decides to move to a rearward seat for a better view. Will this affect how your aircraft flies, even though the total mass has not changed? The answer is most certainly yes, but let us see what happens, and how to make sure you don’t cause yourself any unexpected problems…

## What is the difference between Climb Gradient and Flight Path Angle?

Climb gradient has nothing to do with speed. Let me repeat – nothing to do with speed. If speed is concerned, then we are talking about the rate of climb… But what is flight path angle?

## “Coffin Corner” – Aerodynamic Ceiling Explained

An interesting occurrence, related to Mach number, occurs at high altitudes in the troposphere, called ‘coffin corner’. If you are having visions of some deadly myth as scary as flying into the Bermuda triangle, fear not…

## What is the difference between absolute and service ceiling?

Ceiling applies to how high an aircraft can climb, but this is further divided into an absolute ceiling, and a service ceiling. Let’s have a look at the difference and what they mean…

## What is ISA temperature deviation, and why should you calculate it?

Let’s start with a brain jiggle – if the actual outside air temperature (OAT) differs from the ISA for the particular altitude or flight level that you are at, then this will affect your aircraft’s performance…