Incorporates two or more engines, enhancing survivability and / or performance.
Inherent ability of airframe to take considerable damage.
Fuselage volume includes space for internally-held weapons or special-mission equipment.
Can reach and operate at higher altitudes than average aircraft of its time.
EXTENDED RANGE PERFORMANCE
Capability to travel considerable distances through onboard fuel stores.
Ability to operate over ocean in addition to surviving the special rigors of the maritime environment.
Manual process of allowing its pilot and / or crew to exit in the event of an airborne emergency.
Beyond a pilot, the aircraft takes advantage of additional crew specialized in specific functions aboard the aircraft.
Features partially- or wholly-enclosed crew workspaces.
Features retracting / retractable undercarriage to preserve aerodynamic efficiency.