Serious question for a QFI
Ladies / Gents,
Ones son has asked a question concerning the four forces on an aircraft when under 'G' and I would be grateful if someone were to offer a simplistic answer.
He understands the four forces and that to maintain flight lift has got to be equal or greater then weight or gravity. He has stated that when pulling '+G' the aircraft and occupants weigh many times their static weight. Logic therefore states that increased lift is required when pulling +G.
In trying to answer, I mentioned that G is always married to momentum at which time he shot me down by posing a question about approaching the top of a loop and losing momentum whilst maintaining +G. Clearly the aerofoil section and surface area are a constant on all but swing wing aircraft, therefore how is the need for increased lift met on a conventional aircraft whilst sustaining G.
To keep things resonably simple; in a scenario of a run-and-break for example. Genuine question requiring sincere replies please.