What is another word for maximum time aloft?
Pronunciation: [mˈaksɪməm tˈa͡ɪm ɐlˈɒft] (IPA) 
Maximum time aloft refers to the longest time an object can remain in the air without additional assistance or propulsion. It is often used in reference to aircraft, balloons, and other flying objects. Synonyms for maximum time aloft include "flight duration," "airborne endurance," and "hang time." These terms all describe the amount of time an object can stay in the air. Other phrases that may be used to convey the same meaning include "maximum flight time," "continuous flight duration," and "longest possible airborne time." Whatever the term used, it describes the maximum period that an object can stay airborne.
