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Funny Thing With Rudder Control
- Thread starter Brother23
- Start date
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Nothing goes wrong.
If you use rudder, an real-life airplane yaws as expected. But yaw means that it also gets into a sideslip: the airstream attacks the fuselage, wings, and tail surfaces at an angle and not frontal (sideslip angle BETA).
Roll Moment with Sideslip CL-beta is now active:
The coefficient for Roll Moment with Sideslip - CL-beta can be found in section ROLL in record 1101 of the air-file .
I´m surprised that you did not notice this effect in flying other simulator aircraft. What was the base aircraft for your modifications in the .air-file ?
Carl
If you use rudder, an real-life airplane yaws as expected. But yaw means that it also gets into a sideslip: the airstream attacks the fuselage, wings, and tail surfaces at an angle and not frontal (sideslip angle BETA).
Roll Moment with Sideslip CL-beta is now active:
- In any wing arrangement were the wings have positive dihedral (V-shape) the leading wing sees a greater angle of attack and therefore a higher lift as the other wing which induces a rolling movement in the direction of rudder deflection.
- In sideslip the airstream also meets the the tail fin not frontal but a an angle of attack . In the VERTICAL axes this this causes a force that tries to turn back the aircraft (directional stability -"weathervane effect") .
At the same time there is a moment in the LONGTITUDIONAL axes, as normally the surface of the fin is much bigger on the top of the fuselage (above the centerline) .This as well induces a rolling movement in the direction of rudder deflection.
- Similarily wing sweep and dihedral of the horizontal tail induce a rolling moment on defelction of rudder.
The coefficient for Roll Moment with Sideslip - CL-beta can be found in section ROLL in record 1101 of the air-file .
I´m surprised that you did not notice this effect in flying other simulator aircraft. What was the base aircraft for your modifications in the .air-file ?
Carl
Last edited:
Hello
No, it was not only that effect. The Aircraft did no jaw, it only rolled LOL.
Directly out of straight flight. But now its doing better.
If have still some trouble editing my airfile, because I cant simply edit
the 2d and 3d tables. When I use Airwrench it destroy my airfile and the
plane is only flying wild loops with 5 meter diameter. After five seconds my
virtual tespilot shots his breakfast all over inside my monitor and I have
to cancel that.
Now I make the changes in airwrench but only copy the hex info to AIRED.
This works fine, but I cannot change the tables inside that editor in the
graphical view. This neeeeeeeeeeeeeeeeeeeeds tiiiiiiiiiiiiiimmmme.
Greetings
No, it was not only that effect. The Aircraft did no jaw, it only rolled LOL.
Directly out of straight flight. But now its doing better.
If have still some trouble editing my airfile, because I cant simply edit
the 2d and 3d tables. When I use Airwrench it destroy my airfile and the
plane is only flying wild loops with 5 meter diameter. After five seconds my
virtual tespilot shots his breakfast all over inside my monitor and I have
to cancel that.
Now I make the changes in airwrench but only copy the hex info to AIRED.
This works fine, but I cannot change the tables inside that editor in the
graphical view. This neeeeeeeeeeeeeeeeeeeeds tiiiiiiiiiiiiiimmmme.
Greetings