Maximum load factor is which value?

• A. 1.0
• B. 1.5
• C. 2.0
• D. 1.8

Answer: (D)

Maximum load factor is the highest positive g-load the airframe is allowed to endure in normal operation, as defined by the aircraft’s structural limits. It sets the upper bound of the flight envelope to protect the airframe from overstress and fatigue.

For the P-8A Poseidon, the positive limit is 1.8 g. This means that during any maneuver or gust encounter, the instantaneous g-force should not exceed about 1.8 times aircraft weight. This value provides a margin below higher hypothetical limits to keep stress within what the structure can safely handle over time.

In straight-and-level flight you’re at about 1 g, and many gentle maneuvers stay well inside the envelope. Pushing toward the limit means approaching the designed structural boundary, so 1.8 g is the correct ceiling.