In a standard IFR climb procedure, what is the common ground speed utilized for calculations?

In standard IFR (Instrument Flight Rules) climb procedures, the common ground speed used for calculations is generally 140 knots. This speed is established based on various regulatory recommendations and is seen as a practical average for many general aviation and commercial aircraft during climb phases.

Using this ground speed allows for effective calculations regarding climb rates, altitude changes, and fuel consumption, which are critical for flight planning and operational efficiency. It accounts for typical aircraft performance capabilities while providing a margin for varying aircraft categories and types that might utilize IFR procedures.

The choice of 140 knots as a baseline facilitates consistent and reliable calculations across different flight scenarios, making it easier for pilots and flight planners to adhere to prescribed climb gradients and safety parameters.