physics flaw in AH?

[GScholz]

This page also is very informative conserning what makes a stable wing.

http://142.26.194.131/aerodynamics1/Stability/Page7.html

[Sikboy]

Originally posted by Eagler
cg shifts to rear as pilot deposits a hefty load in his britches

-Sik

[hitech]

The physics are correct.

And we do not loose mass when loosing the tail.


HiTech

[Rutilant]

Will the plane lose  mass as parts fall off in 2.0?

[funkedup]

Originally posted by GScholz
Interesting to read their conclusions in this chapter: Velocity changes do not produce pitch changes directly. In AH they do.

Please elaborate, on how velocity changes in AH directly produce pitch changes, and how this is different from real life.

[Rutilant]

watch hitech refuse to answer, as he never follows up after droppin in

[funkedup]

Gscholz, do you realize that the CM vs CL charts on the link you posted show the exact situation in AH, i.e. they support Hitech's conclusion?

[funkedup]

Originally posted by Rutilant
watch hitech refuse to answer, as he never follows up after droppin in

Yeah you gave him a whole 4 minutes to answer.

[Rutilant]

LOL, i didnt mean it as a response to him not answering  within 4 minutes - just tellin it like it always is

[GScholz]

Originally posted by funkedup
Please elaborate, on how velocity changes in AH directly produce pitch changes, and how this is different from real life.

If your plane is trimmed for level flight, no change in velocity would affect pitch. Change in thrust however will. If you turn off the engine and turn the rpm down and trim the plane; no change in velocity would affect pitch. I.e. if you nose the plane down in a shallow dive the plane should not start to level out as speed increases, but rather stay in the dive.

[funkedup]

What I meant was, "Tell me how what happens in AH is different from real life."

[GScholz]

Originally posted by funkedup
Gscholz, do you realize that the CM vs CL charts on the link you posted show the exact situation in AH, i.e. they support Hitech's conclusion?

When you see the flash display at the bottom of the following webpage it is clear that the horizontal stabilizer creates a downward force to counteract the upward force of the wing. If the plane looses this downward force on the tail the nose should drop.

http://142.26.194.131/aerodynamics1/Stability/Page9.html

CG is forward of the wing on dynamically stable planes. I have not heard of a WWII fighter that was dynamically unstable.

[SFRT - Frenchy]

Check this out Fester

[GScholz]

Originally posted by funkedup
What I meant was, "Tell me how what happens in AH is different from real life."

1. Loose tail and the nose goes up. R/L nose goes down because the horizontal stabilizer provides a down force that is in fact "holding your nose up".

2. Deploy flaps nose goes up. R/L nose pitches down because the CL of the wing moves back, further away from the CG.

3. Changes in airspeed requires drastic trimming changes. R/L not so, in fact the Fw190 didn't even have movable trim because it was so stable at all speeds, only small fixed trim tabs were needed. One example how dynamically stable aircraft are just that; stable at all speeds, because speed does not change the balance of forces acting on the pitch axis.

[bloom25]

The tail provides lift.  

(Why does the tail come off the ground during the takeoff roll on a taildragger type aircraft?)