ISO 1151-7:2023

Overview

ISO 1151-7:2023 - Flight dynamics - Vocabulary - Part 7: Flight points and flight envelopes provides a standardized vocabulary for flight‑dynamics studies used to specify aircraft flight conditions and flight envelopes. The second edition (2023) updates and replaces the 1985 version and is intended for analyses of operational, experimental or simulated flights for safety analyses and qualification, explicitly taking into account potential failures and likely environmental conditions.

Keywords: ISO 1151-7:2023, flight dynamics, flight points, flight envelopes, vocabulary, aircraft, safety analyses, flight tests.

Key topics

This part of ISO 1151 defines terms and concepts that support consistent communication in flight dynamics work. Major topics include:

• Mission, flight programme, phase and sub‑phase - terminology for planning and breaking down flights into objectives and stages.
• Controls and selectors - definitions for cockpit controls, distinguishing continuous piloting controls and position selectors used to set configuration.
• Configuration and systems situation - geometric configuration of aircraft components and the operating state of flight‑relevant systems.
• Loads and state of the aircraft - descriptions of loads carriage, mass distribution and the combined real situation resulting from selected configurations plus failures.
• Failure situation and real situation - terms for abnormal component positions, partial failures and their effect on the aircraft state.
• Flight points and piloting rules - vocabulary for the set of parameters, control positions and tolerances used to maintain sub‑phase objectives.
• Flight envelopes - concepts used to describe authorized or admissible combinations of flight parameters and limits.
• Environment definitions - state, model, reference and standard atmosphere; state of runway and other environmental factors relevant to flight dynamics.

Notes in the standard emphasize the use of tolerances for piloting rules, consideration of transition sub‑phases, and the need to document selected situations for experimental or non‑standard configurations.

Applications

ISO 1151-7:2023 is practical for:

• Safety analyses and airworthiness qualification studies that require unambiguous definitions of flight conditions and envelopes.
• Flight test and simulator programs where consistent terminology for phases, failure situations and piloting rules is essential.
• Modeling and simulation work that depends on standardized atmosphere and runway state descriptions.
• Operational documentation, flight manuals and procedure development that reference flight points and authorized envelopes.

Who uses this standard

• Aerospace engineers (flight dynamics, systems, structures)
• Test pilots and flight test engineers
• Simulation and avionics developers
• Certification authorities and safety analysts
• Technical writers preparing flight manuals and procedures

Related standards

• ISO 1151 series (other parts of flight dynamics vocabulary)
• ISO 2533 (standard atmosphere)
• Other referenced parts: ISO 1151-1, ISO 1151-2, ISO 1151-5 (as cited within the document)

Using ISO 1151-7:2023 helps ensure consistent, defensible terminology across flight dynamics, testing, simulation and certification activities.