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Rudder Sluggish?

lionheart

lionheart

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us-arizona
Hey all,

Im having an issue with a plane I am making. The rudder input seems sluggish instead of crisp. If I get in the Maule and do some touch and goes, I can hit the runway everytime, landing dead on center. But in my latest bird, she is all over the place, I can never get her to land right on the center of the runway. Further more, she will fly off the side of the runway when I am taking off, no matter what kind of fancy rudder input I put in the controls.

Any idea on what settings would enable me to correct this? It seems like she is sluggish in moving/changing course, while the Maule is crisp and reactive.
 
Hello Lionheart

It sounds like you either have too much yaw stability or too little rudder control.

There are quite a few entries in the air and aircraft.cfg file which could affect this.
If it was me, I'd start with the aircraft.cfg [flight_tuning] section (if there is one) and check for too low rudder_effectiveness or too high yaw-stability. I'd enter 1.0 for both, just to be going on with.
Opinion seems to vary about this, but I'd also check the [airplane_geometry] section to make sure there is a decent area of rudder and that it has a reasonable travel.

Now for the air file.

Entry 1101, Yaw section
Check that the first entry, weathervane stability, isn't ridiculously high (I suspect a light aircraft should be no more than 200)

Then I'd go to Cn_dr Yaw Moment - rudder(control)
and increase that until I got some response.

If there is no improvement:

If there is an entry 343 make sure it peaks around 1.0 and doesn't drop off too quickly on either side. A flat line at 1.0 should work fine. Same for 519 and 1636.

Have fun

Alan
 
I know what you mean. I've been messing about with flight dynamics for years and still have to start again sometimes.

Alan
 
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