# Marginal stable airplane

by Imtheking
Tags: airplane, marginal, stable
PF Gold
P: 1,503
 Quote by Cyrus I'm going to make it a point to use it in conversation to sound smart tomorrow, lol.
Every time I try to do this, I forget within about 30 minutes.
P: 4,777
 Quote by boneh3ad Every time I try to do this, I forget within about 30 minutes.
Doubt is not a pleasant condition, but certainty is absurd.

— Voltaire
PF Gold
P: 1,503
 Quote by Cyrus Doubt is not a pleasant condition, but certainty is absurd. — Voltaire
Nice try, but it doesn't really apply here, chief.
 PF Gold P: 8,964 Maybe I'm missing something here because I didn't start flying until 1975, but I have never heard of a "neutral point" in relation to an aeroplane. edit: Alright, I have heard of it, but it was in relation to the mile-high club, so I doubt that it is relevant to this thread.
P: 43
 Quote by Danger Maybe I'm missing something here because I didn't start flying until 1975, but I have never heard of a "neutral point" in relation to an aeroplane.
Of course you have! You just didn't know it. I'm sure you were taught about CG movement for an airplane and the need to be sure how far aft the CG may move- for instance as you add passengers and bags for a GA airplane.

CG moving aft of the neutral point means bad juju!
PF Gold
P: 8,964
 Quote by dtango Of course you have! You just didn't know it. I'm sure you were taught about CG movement for an airplane and the need to be sure how far aft the CG may move- for instance as you add passengers and bags for a GA airplane. CG moving aft of the neutral point means bad juju!
Okay, yeah... I've never heard it called that, though.
P: 595
 Quote by Danger Okay, yeah... I've never heard it called that, though.
It's not. They're confusing it with the center of pressure. The neutral point and the center of pressure are very closely related, but they're not synonomous.
P: 4,777
 Quote by mugaliens It's not. They're confusing it with the center of pressure. The neutral point and the center of pressure are very closely related, but they're not synonomous.