flight envelope


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flight envelope

[′flīt ‚en·və‚lōp]
(aerospace engineering)
The boundary depicting, for a specific aircraft, the limits of speed, altitude, and acceleration which that aircraft cannot safely exceed.

flight envelope

flight envelopeclick for a larger image
The defined conditions of air speed, altitude, g loading, sideslip, etc. the aircraft is permitted to operate within. It is a graph in which curves of the speed are plotted against altitude or other variables. It indicates the limits within which the aircraft can be operated safely.
References in periodicals archive ?
The squadron is equipped with a broad array of capabilities including electro optic and radar payloads, enhanced flight envelope altitude, speed and range, airborne endurance and larger payload capacity.
During the flight, the crew tested the aircraft's flight controls, engines and main systems including flight envelope protections, both at high and low speed.
Conversely, the stall speed for the M-345 is 82 knots, which means the flight envelope is impressively large, a key discriminator in live flying training.
The G5000 installation on the Citation Excel/XLS includes a fully digital Automatic Flight Control System (AFCS), offering precise performance and optimized for comfort throughout the aircraft's flight envelope.
Areas of the flight envelope and the performance of the systems, including at extreme temperatures, have been tested.
A test team from Air Test and Evaluation Squadron (HX) 21 reached that level in May as they met the challenge of conducting testing required to expand the flight envelope for the UHTY Venom helicopter onboard San Antonio-class amphibious landing dock ship USS Mesa Verde (LPD 19).
Utilizing a third stream of air that can be modulated to adapt the engine's performance across the flight envelope means a fighter can have the best of both worlds by accessing an on-demand increase in thrust or smoothly shift to highly efficient operations during cruise.
To establish basic handling characteristics of Airlander within a well-defined flight envelope, including assessment of the new ALS.
They realize and understand stalls are simply what happens at the lowest end of an aircraft's normal flight envelope.
so almost all of us are flying airplanes with known flight characteristics, fully developed technical orders and Dash-ls, and pages and pages of TTR The entirety of these documents describes a thoroughly understood flight envelope, within which pilots enjoy significant safety margins to accomplish their assigned mission.
The flight lasted five hours and 29 minutes during which tests were performed on the engine speed variation (low/high), systems behaviour and to validate the aircraft's flight envelope.
Flight envelope protections built into fly-by-wire systems can help get pilots out of trouble and could eventually eliminate the need for some upset recovery training, although pilots will always need training in the fundamentals of flying, especially how to recover a fly-by-wire aircraft in a mode where protections have been removed.