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.
Manual process of allowing its pilot and / or crew to exit in the event of an airborne emergency.
Supports pressurization required at higher operating altitudes for crew survival.
Beyond a pilot, the aircraft takes advantage of additional crew specialized in specific functions aboard the aircraft.
Defensive gun positions for engagement / suppression.
Defensive rear-facing gun position to neutralize enemy targets emerging from the rear.
Features partially- or wholly-enclosed crew workspaces.
Features retracting / retractable undercarriage to preserve aerodynamic efficiency.