In a cargo plane, the center of gravity must be between the front and rear landing gears in order to maintain?

Question

In a cargo plane, the center of gravity must be between the front and rear landing gears in order to maintain?

Answer 1

the cg of an aircraft-is the point where the aircraft weight is distributed equally on both sides of an imaginary line running fore and aft and side to side and from top to bottom ie all three axis..all equations used determining this is called weight-arm-moment,,,,,

Answer 2

balance/stability  while rolling or setting on the ground

Answer 3

As "kiss" mentions above, the flight CG range has nothing to do with the location of the landing gear, but is actually related to the center of lift and the working ranges of the flight controls.

If the CG is behind the main gear while the aircraft is sitting on the ground, the nose wheel will come off the ground, and the airplane may "sit back" on its tail.  This happens more often than you might think, and is always good for a laugh at the pub later.

So I guess to put the answer in the form of the question, it would be "...in order to maintain a level deck."

Answer 4

Any plane, cargo or otherwise, has to have that or it will tip over on the ground.  Really tells you where the GEAR have to be, not how it will fly.

Answer 5

The center of gravity is defined by the manufacturer, and must be within a certain area on the aircraft.  It actually has nothing to do with the landing gear, except that the main gear must be behind the CG if you don't want the aircraft to sit up on it's tail.  The CG for flight has to be within a certain envelope so that the aircraft flies correctly.  It's actually an area in relation to the wings.  Also, cargo planes and passenger planes are pretty much the same on this, as many can be converted to one or the other.

PS, I guess I was assuming that you were talking about a tricycle gear aircraft, as a taildragger would have the CG aft of the main gear.  They still fly some old DC-3's as cargo aircraft, but most aircraft these days are tricycle.

Answer 6

stability?

Answer 7

As mentioned by Oldguy and others.  The answer is stability when on the ground.

As soon as the aircraft is relieved of aerodynamic loading, and is relying only on the undercarriage for support, then the CofG must be between the various elements of the undercarriage.  If not, there would be a moment created due to all the reaction forces being on one side of the CofG and the aircraft would tip.

Answer 8

Yea. So what is you question?

Answer 9

it's center of gravity

Answer 10

There is an imaginary triangle that goes between the back two landing gear and the front one. As long as the CG stays in the triangle is can maintain a flight plan and landing.