The following question is from the FAA PAR (Private Pilot, Airplane) exam :

The load factor on an airplane increases with :

(A) Any moderate change in pitch attitude, increase in weight, and steep turns.

(B) Increase in weight, an increase in power, and any moderate pitch changes.

(C) Increase in weight, steep turns, and abrupt changes in airplane attitude.

The correct answer is supposed to be (C).

All of the answers say that load factor increases with an increase in weight. However, load factor is inversely proportional to weight by definition.

What am I misunderstanding?

Edit: I think it is supposed to say "load" instead of "load factor" but it was not written that way.

• Weight is the force on a mass from acceleration. The aircraft mass is constant, so if the weight increases, it must be from an increase in acceleration. Load factor is the ratio between normal acceleration and gravitational acceleration, hence weight goes up with load factor. What surprises me is that the FAA does not confuse weight with mass, as they usually do in those exams. – Peter Kämpf May 7 '19 at 10:47
• @PeterKämpf The weight of an airplane does not change (appreciably) during flight maneuvers (e.g. steep turns). It is the force due to gravity, not the force due to acceleration. The load factor is 2g in a constant altitude 60 degree turn, so the pilot feels twice as heavy. However, his weight has not actually increased. – simple jack May 7 '19 at 17:16
• You are confusing weight with mass. What's your weight on the lunar surface? – Peter Kämpf May 8 '19 at 15:28
• No I’m not. I think you are confusing fictitious forces with weight. Are you saying that an airplane in a coordinated 60 degree constant-altitude turn literally becomes twice as heavy? – simple jack May 8 '19 at 19:54
• Yes, it has twice the weight and therefore needs twice the lift. Mass will stay constant, though. Which unit do you use for weight, and which for mass? – Peter Kämpf May 8 '19 at 21:33