What does a negative moment tell us about the characterisics of the airfoil?

[boneh3ad]

Right... both of those are named specifically as subheadings because they aren't treated the same.

Another list of books...
In fluids:
"Principles of Ideal-Fluid Aerodynamics" by Karamcheti - Moment has its own entry in the sense I use it.

"Viscous Fluid Flow" by White - Moment is used as I have described it.

"Fundamentals of Aerodynamics" by Anderson - Moment is used in several contexts as I have described it.

"Fundamentals of Fluid Mechanics" by Munson, Young and Okiishi - Separate entries for moment of inertia and moment of momentum as I have described.

"Theory of Wing Sections" by Abbott and Von Doenhoff - Moment is used as I have described; has a lot of stuff about pitching moments in particular.

"Low-Speed Aerodynamics" by Katz and Plotkin - Index doesn't refer to "moment" specifically, but points to moment coefficient. That section uses it as I have described it in relation to the pitching moment.

Other areas of mechanics:
"Dynamic Systems: Modeling and Analysis" by Vu and Esfandiari - Moment is used as I have described it and has a separate entry for moment of inertia.

"Classical Mechanics" by Taylor - Only refers specifically to moment of inertia

Those are the only books in arm's reach for me that talk about moments. All of them support me. I don't know how much more plain I can make it for you. In common engineering practice, the term moment refers to the first force moment. All other moments that are important are referred to by name.

 

[Phrak]

Right... both of those are named specifically as subheadings because they aren't treated the same.

Another list of books...
In fluids:
"Principles of Ideal-Fluid Aerodynamics" by Karamcheti - Moment has its own entry in the sense I use it.

"Viscous Fluid Flow" by White - Moment is used as I have described it.

"Fundamentals of Aerodynamics" by Anderson - Moment is used in several contexts as I have described it.

"Fundamentals of Fluid Mechanics" by Munson, Young and Okiishi - Separate entries for moment of inertia and moment of momentum as I have described.

"Theory of Wing Sections" by Abbott and Von Doenhoff - Moment is used as I have described; has a lot of stuff about pitching moments in particular.

"Low-Speed Aerodynamics" by Katz and Plotkin - Index doesn't refer to "moment" specifically, but points to moment coefficient. That section uses it as I have described it in relation to the pitching moment.

Other areas of mechanics:
"Dynamic Systems: Modeling and Analysis" by Vu and Esfandiari - Moment is used as I have described it and has a separate entry for moment of inertia.

"Classical Mechanics" by Taylor - Only refers specifically to moment of inertia

Those are the only books in arm's reach for me that talk about moments. All of them support me. I don't know how much more plain I can make it for you. In common engineering practice, the term moment refers to the first force moment. All other moments that are important are referred to by name.

I've already said 'moment' commonly refers to the first moment of force by convention.

 

[boneh3ad]

Then what are you arguing about? That has been my point all along yet you keep telling me I am wrong.

 

[Phrak]

Then what are you arguing about? That has been my point all along yet you keep telling me I am wrong.

No it hasn't been your point all along. I made it first, and seem to have missed it. So what are you arguing about?

 

[boneh3ad]

No it hasn't been your point all along. I made it first, and seem to have missed it. So what are you arguing about?

Claim what you want, that was not your point. I am done with this as it is going nowhere and serves no purpose.

 

[Phrak]

Claim what you want, that was not your point.

It was.

I am done with this as it is going nowhere and serves no purpose.

See you later.

 

[mugaliens]

No, and this is the point. There is also the angular inertia, center of mass and total mass, and the moments involved in Euler buckling and torsional rigidity to obtain the radius or gyration.

None of which has anything to do with the question asked in the OP.

 

[Phrak]

None of which has anything to do with the question asked in the OP.

No. Indirectly, it does.